NZ622445B - Selective weed control using d-napropamide - Google Patents
Selective weed control using d-napropamideInfo
- Publication number
- NZ622445B NZ622445B NZ622445A NZ62244514A NZ622445B NZ 622445 B NZ622445 B NZ 622445B NZ 622445 A NZ622445 A NZ 622445A NZ 62244514 A NZ62244514 A NZ 62244514A NZ 622445 B NZ622445 B NZ 622445B
- Authority
- NZ
- New Zealand
- Prior art keywords
- napropamide
- clomazone
- weed
- locus
- herbicide
- Prior art date
Links
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Classifications
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- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
- A01N37/20—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof containing the group, wherein Cn means a carbon skeleton not containing a ring; Thio analogues thereof
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- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof
- A01N37/22—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing the group —CO—N<, e.g. carboxylic acid amides or imides; Thio analogues thereof the nitrogen atom being directly attached to an aromatic ring system, e.g. anilides
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- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N39/00—Biocides, pest repellants or attractants, or plant growth regulators containing aryloxy- or arylthio-aliphatic or cycloaliphatic compounds, containing the group or, e.g. phenoxyethylamine, phenylthio-acetonitrile, phenoxyacetone
- A01N39/02—Aryloxy-carboxylic acids; Derivatives thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
- A01N43/42—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings condensed with carbocyclic rings
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/48—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with two nitrogen atoms as the only ring hetero atoms
- A01N43/58—1,2-Diazines; Hydrogenated 1,2-diazines
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- A—HUMAN NECESSITIES
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- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
- A01N43/707—1,2,3- or 1,2,4-triazines; Hydrogenated 1,2,3- or 1,2,4-triazines
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- A—HUMAN NECESSITIES
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- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/74—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,3
- A01N43/78—1,3-Thiazoles; Hydrogenated 1,3-thiazoles
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- A—HUMAN NECESSITIES
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- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
- A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/10—Carbamic acid derivatives, i.e. containing the group —O—CO—N<; Thio analogues thereof
- A01N47/20—N-Aryl derivatives thereof
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N47/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid
- A01N47/08—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom not being member of a ring and having no bond to a carbon or hydrogen atom, e.g. derivatives of carbonic acid the carbon atom having one or more single bonds to nitrogen atoms
- A01N47/28—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N<
- A01N47/32—Ureas or thioureas containing the groups >N—CO—N< or >N—CS—N< containing >N—CO—N< or >N—CS—N< groups directly attached to a cycloaliphatic ring
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N57/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds
- A01N57/18—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds
- A01N57/20—Biocides, pest repellants or attractants, or plant growth regulators containing organic phosphorus compounds having phosphorus-to-carbon bonds containing acyclic or cycloaliphatic radicals
Abstract
The disclosure relates to a herbicide combination which comprises D-Napropamide (D-(-)-N,N-diethyl-2-(α-naphthoxy)propionamide); and a second herbicide which is more active against monocotyledonous weeds than dicotyledonous weeds, wherein the second herbicide is selected from (i) S-Metolachlor; (ii) Metolachlor; (iii)Clomazone; (iv) Flufenacet; (v) Diflufenican; (vi) Flufenacet + Diflufenican; (vii) Benfluraline; (viii) Quinmerac; (ix) Metazachlor; (x) Quinmerac + Metazachlor; (xi) Glufosinate; (xii) Metribuzin; (xiii) Clomazone + S-Metolachlor; (xiv) Dimethachlor; (xv) Benazolin; (xvi) Carbetamide; (xvii) Clethodim; (xviii) Cycloxydim; (xix) Sethoxydim; (xx) Clopyralid; (xxi) Cyanazine; (xxii) Simazine; (xxiii) Diclofop; (xxiv) Fenoxaprop-P; (xxv) Fluazifop-P; (xxvi) Haloxyfop-P; (xxvii) Propaquizafop; (xxviii) Quizalafop; (xxix) Dimefuron; (xxx) Flumetsulam; (xxxi) Propyzamide; (xxxii) Pyridate; (xxxiii)Trifluralin; (xxxiv) Pethoxamid; (xxxv) Pendimethalin; (xxxvi) Clomazone + Dimethachlor and (xxxvii) Clomazone + Metazachlor. Also disclosed is the use of D-Napropamide for the selective control of a dicotyledonous weed at a locus, wherein the D-Napropamide is applied in an amount such that it is effective in controlling said dicotyledonous weed yet less active against monocotyledonous plant species at the locus. Metolachlor; (iii)Clomazone; (iv) Flufenacet; (v) Diflufenican; (vi) Flufenacet + Diflufenican; (vii) Benfluraline; (viii) Quinmerac; (ix) Metazachlor; (x) Quinmerac + Metazachlor; (xi) Glufosinate; (xii) Metribuzin; (xiii) Clomazone + S-Metolachlor; (xiv) Dimethachlor; (xv) Benazolin; (xvi) Carbetamide; (xvii) Clethodim; (xviii) Cycloxydim; (xix) Sethoxydim; (xx) Clopyralid; (xxi) Cyanazine; (xxii) Simazine; (xxiii) Diclofop; (xxiv) Fenoxaprop-P; (xxv) Fluazifop-P; (xxvi) Haloxyfop-P; (xxvii) Propaquizafop; (xxviii) Quizalafop; (xxix) Dimefuron; (xxx) Flumetsulam; (xxxi) Propyzamide; (xxxii) Pyridate; (xxxiii)Trifluralin; (xxxiv) Pethoxamid; (xxxv) Pendimethalin; (xxxvi) Clomazone + Dimethachlor and (xxxvii) Clomazone + Metazachlor. Also disclosed is the use of D-Napropamide for the selective control of a dicotyledonous weed at a locus, wherein the D-Napropamide is applied in an amount such that it is effective in controlling said dicotyledonous weed yet less active against monocotyledonous plant species at the locus.
Description
SELECTIVE WEED CONTROL USING D-NAPROPAMIDE
FIELD OF INVENTION:
The present invention relates to the use of Napropamide-M for selective control of
dicotyledonous weeds.
BACKGROUND AND PRIOR ARTS:
Many herbicides are reported in the prior art. However, the herbicidal effectiveness of a given
compound cannot be predicted from an examination of the substituent groups of the compound
and often quite closely related compounds, which will have quite different weed control abilities.
Various herbicides or the isomers of the same herbicide may have overlapping or complementary
areas of activity or selectivity, and can thus be useful to control a variety of weeds upon
application of a composition. Furthermore, the various known herbicides are not completely
effective. An ideal herbicide should give selective weed control, over the full growing season,
with a single administration. It should be able to control all common weeds by controlling their
growth and reproduction as the seed, the germinating seed, the seedling, and the growing plant.
Although the enantiomers of chiral substances have the same physicochemical properties, their
biochemical activities can be quite different because biochemical processes usually show high
stereo- or enantioselectivity.
The “active” enantiomer of a chiral chemical may have the desired effect on a target species,
whereas the other enantiomer may not. It is advisable to use only the biologically active
enantiomers, thereby reducing the total amount of chemical pollutants released into the
environment.
Many agrochemicals have chiral structures. For example, about 30% of currently registered
pesticide active ingredients contain one or more chiral centers. Herbicides are used to control the
growth of undesired vegetation, and they account for most of the agrochemicals in use today.
Some chiral herbicides are sold as purified, optically active isomers, but for economic reasons,
many others are still used as racemates. Different enantiomers of chiral herbicides can have
different enantioselective activities on target weeds and different toxic effects on non-target
organisms because of their enantioselective interactions with enzymes and biological receptors in
organisms but the herbicidal selectivity of a specific isomer is not predictable.
N,N-diethyl(α-naphthoxy)propionamide is known as napropamide, and its racemic mixture is
generally marketed under trade name as "Devrinol". It is used for pre-emergence control of
annual grasses and broad-leaved weeds in many crops and plantations.
The second carbon atom at the propionamide group in napropamide has a hydrogen atom, a
methyl group, a naphthoxy moiety and a carboxamide group thereby forming a chiral center.
Hence the molecule [Fig I] can exist in two chiral stereoisomers: D or (R) and L or (S)-isomers.
Napropramide is a selective systemic herbicide absorbed by roots and translocated acripetally. It
inhibits root development and growth.
Unsolved problems in this area include widely differing sensitivities of crop plants against
herbicidal chemicals as well as the fact that repression of one weed species may cause increased
growth of another competing weed species, and that some weeds tend to become resistant against
previously effective herbicides.
US3718455 discloses new organic compounds of formula I used as herbicides.
This structure includes the compound Napropamide (Compound No. 54 and Compound No. 55).
The herbicidal activity of compounds 1 to 22 is reported on crabgrass, annual bluegrass,
watergrass and foxtail. This patent discloses that Compound No. 54 and Compound No. 55
possess good herbicidal activity and can be used as pre-emergent and post-emergent herbicides
(Table III). This patent disclosure did not investigate and does not indicate any differential
selectivity of D-Napropamide towards different weed classes or types.
WO2009004642 discloses a process for manufacture of high purity D-(-)-N,N-diethyl(α-
naphthoxy)propionamide from LHalopropionic Acid or (s)-(-)Halopropionic Acid and
composition comprising high purity D-(-)-N,N-diethyl (α-naphthoxy)propionamide. Again,
this patent disclosure did not investigate and does not indicate any differential selectivity of D-
Napropamide towards different weed classes or types.
There is a need in the art for enhanced uses of D-Napropamide and for improved methods of
herbicidal control by using D-Napropamide.
SUMMARY OF THE INVENTION:
In one aspect, the present invention provides the use of D- Napropamide for selective control of
dicotyledonous weeds at a locus.
In another aspect, the present invention provides a method of selectively controlling
dicotyledonous weeds infestation at a locus, which method comprises treating said locus with a
herbicidally effective amount of D- Napropamide, wherein the D-Napropamide is applied in an
amount such that it is effective in controlling said dicotyledonous weed yet is less active against
monocotyledonous plant species.
In another aspect, the invention provides a herbicide combination which comprises D-
Napropamide; and a second herbicide selected from:
(i) S-Metolachlor;
(ii) Metolachlor;
(iii)Clomazone;
(iv) Flufenacet;
(v) Diflufenican;
(vi) Flufenacet + Diflufenican;
(vii) Benfluraline;
(viii) Quinmerac;
(ix) Metazachlor;
(x) Quinmerac + Metazachlor;
(xi) Glufosinate;
(xii) Metribuzin;
(xiii) Clomazone + S-Metolachlor;
(xiv) Dimethachlor;
(xv) Benazolin;
(xvi) Carbetamide;
(xvii) Clethodim;
(xviii) Cycloxydim;
(xix) Sethoxydim;
(xx) Clopyralid;
(xxi) Cyanazine;
(xxii) Simazine;
(xxiii) Diclofop;
(xxiv) Fenoxaprop-P;
(xxv) Fluazifop-P;
(xxvi) Haloxyfop-P;
(xxvii) Propaquizafop;
(xxviii)Quizalafop;
(xxix) Dimefuron;
(xxx) Flumetsulam;
(xxxi) Propyzamide;
(xxxii) Pyridate;
(xxxiii)Trifluralin;
(xxxiv) Pethoxamid
(xxxv) Pendimethalin
(xxxvi) Clomazone + Dimethachlor and
(xxxvii) Clomazone + Metazachlor.
Also described herein is a herbicidal composition for selectively controlling the dicotyledonous
weeds infestation at a locus, said composition comprising D- Napropamide.
DETAILED DESCRIPTION OF THE INVENTION:
In this specification, the terms Napropamide-M and D-Napropamide are used interchangeably.
Racemic Napropamide has a satisfactorily good herbicidal activity. D-Napropamide possesses
improved activity than L-Napropamide. A comparatively similar distribution of herbicidal
activity enhancement by use of D-Napropamide (over racemic Napropamide) for
monocotyledonous weeds as well as dicotyledonous weeds was expected. It was surprisingly
found that D-Napropamide demonstrates a selectively enhanced control in the growth of
dicotyledonous weeds in agronomic crops vis-à-vis the control in monocotyledonous weeds.
Therefore, in an embodiment, the present invention provides use of D- Napropamide for the
selective control of a dicotyledonous weed at a locus.
The term locus as used herein shall denote the vicinity of a desired crop in which weed control,
typically selective weed control, of dicotyledonous weeds is desired. The locus includes the
vicinity of desired crop plants wherein the weed infestation has either emerged or is yet to
emerge. The term crop shall include a multitude of desired crop plants or an individual crop plant
growing at a locus.
The term control indicates eradication of the investigated weed(s). A 100% control signifies total
eradication of the weed(s) under investigation.
In another embodiment, the present invention provides a method of controlling dicotyledonous
weeds infestation at a locus, which method comprises treating said locus with a herbicidally
effective amount of D- Napropamide, wherein the D-Napropamide is applied in an amount such
that it is effective in controlling said dicotyledonous weed yet is less active against
monocotyledonous plant species.
Preferably, treating the locus with D-Napropamide comprises administering to the soil in which
the desired crop is to be planted, an effective amount of D-Napropamide. The administration is
preferably by application either before seeding, during seeding, or, as in most applications, after
seeding and before the crop emerges, so as to prevent the emergence of any weeds.
In an embodiment, D-Napropamide is administered prior to the emergence of any weed.
Among the crops which show pre-emergence tolerance to D- Napropamide and in which this
compound can be used as a herbicide are winter oilseed rape, strawberries, blackcurrants,
gooseberries, raspberries, field trees, shrubs, broccoli, cabbage, calabrese, cauliflower, kale and
Brussel’s sprouts. The method of the present invention is particularly useful in controlling the
growth of dicotyledonous weeds in these crops.
In an embodiment, the dicotyledonous weeds which were found surprisingly susceptible to D-
Napropamide are selected from the group comprising chickweed, speedwell, poppy, field
bindweed, hairy fleabane, nettleleaf goosefoot, common groundsel, horseweed, common
lambsqaurters, little mallow, burning nettle, sowthistles, carpetweed, fat hen, blackberry
nightshade, small flowered mallow, nettles, deadnettle, knotweed, common sowthistle and
amaranthus.
However, it should be understood that the use of D-Napropamide and a method of the present
invention is not limited to the control of these weeds alone but is applicable to any
dicotyledonous weed.
The herbicide of the invention can be applied to the soil or to crops in any amount which will
give the required control of weeds. A preferred rate of application is from about 0.5 to about 20
L/Ha of D Napropamide, and most preferably from about 1 to about 8 L/Ha.
In an embodiment, Napropamide-M may be preferably used for control of dicotyledonous weeds
in oil-seed rape at a dose of 500 – 1500 g/Ha, preferably 750-850 g/Ha.
In another embodiment, Napropamide-M may be preferably used in field crops in the range of
450-600 g/Ha.
In another embodiment, Napropamide-M may be used in perennial crops at a dosage of 2000-
3000 g/Ha.
In an embodiment, the dicotyledonous weeds especially susceptible to D-Napropamide may be
selected from the group consisting of Acalypha gracilens, Acalypha ostryifolia, Acalypha
rhomboidea, Acalypha virginica, Acer rubrum, Acer saccharinum, Actaea pachypoda, Actaea
racemosa, Aeschynomene virginica, Agalinis purpurea, Agalinis setacea, Agalinis tenuifolia,
Agastache nepetoides, Agastache scrophulariifolia, Ageratina altissima, Ageratina aromatica,
Agrimonia parviflora, Agrimonia pubescens, Agrimonia rostellata, Alnus serrulata, Amaranthus
cannabinus, Amaranthus hybridus, Amaranthus spinosus, Ambrosia artemisiifolia, Ambrosia
trifida, Amelanchier arborea, Amelanchier Canadensis, Amelanchier laevis, Amelanchier
obovalis, Amelanchier stolonifera, Amorpha fruticosa, Amphicarpaea bracteata, Anaphalis
margaritacea, Anemone quinquefolia, Anemone virginiana, Angelica venenosa, Antennaria
plantaginifolia, Apocynum androsaemifolium, Apocynum cannabinum, Aquilegia Canadensis,
Arabis lyrata, Aralia nudicaulis, Aralia racemosa, Aralia spinosa, Argemone Mexicana,
Aristolochia serpentaria, Arnoglossum atriplicifolium, Arnoglossum reniforme, Artemisia
campestris, Artemisia ludoviciana, Asarum canadense, Asclepias amplexicaulis, Asclepias
incarnate, Asclepias purpurascens, Asclepias quadrifolia, Asclepias rubra, Asclepias syriaca,
Asclepias tuberose, Asclepias variegate, Asclepias verticillata, Aureolaria pedicularia,
Aureolaria virginica, Baccharis halimifolia, Baptisia tinctoria, Bartonia paniculata, Bartonia
virginica, Betula nigra, Betula populifolia, Bidens aristosa, Bidens bidentoides, Bidens
bipinnata, Bidens cernua, Bidens coronate, Bidens discoidea, Bidens frondosa, Bidens laevis,
Bidens tripartite, Boehmeria cylindrical, Brasenia schreberi, Brickellia eupatorioides, Cakile
edentula, Callitriche heterophylla, Callitriche terrestris, Caltha palustris, Calystegia
spithamaea, Campanula aparinoides, Campsis radicans, Cardamine bulbosa, Cardamine
concatenate, Cardamine parviflora, Cardamine pensylvanica, Carya alba, Carya glabra, Carya
ovate, Carya pallid, Castanea dentate, Castanea pumila, Castilleja coccinea, Catalpa
bignonioides, Ceanothus americanus, Celastrus scandens, Celtis occidentalis, Celtis tenuifolia,
Cephalanthus occidentalis, Cerastium nutans, Ceratophyllum demersum, Cercis Canadensis,
Chaerophyllum procumbens, Chamaecrista fasciculate, Chamaecrista nictitans, Chamaedaphne
calyculata, Chamaesyce maculate, Chamaesyce nutans, Chamaesyce polygonifolia, Chamerion
angustifolium, Chelone glabra, Chenopodium pratericola, Chenopodium rubrum, Chenopodium
simplex, Chimaphila maculate, Chimaphila umbellate, Chionanthus virginicus, Chrysopsis
mariana, Chrysosplenium americanum, Cicuta bulbifera, Cicuta maculate, Hybanthus concolor,
Hydrastis Canadensis, Hydrocotyle Americana, Hydrocotyle umbellate, Hydrocotyle verticillata,
Hypericum boreale, Hypericum canadense, Hypericum crux-andreae, Hypericum densiflorum,
Hypericum denticulatum, Hypericum ellipticum, Hypericum gentianoides, Hypericum
hypericoides, Hypericum majus, Hypericum mutilum, Hypericum punctatum, Ilex glabra, Ilex
laevigata, Ilex mucronata, Ilex opaca, Ilex verticillata, Impatiens capensis, Ionactis linariifolius,
Ipomoea pandurata, Itea virginica, Juglans cinerea, Juglans nigra, Kalmia angustifolia, Kalmia
latifolia, Kosteletzkya virginica, Krigia biflora, Krigia virginica, Lactuca biennis, Lactuca
Canadensis, Lactuca hirsute, Laportea Canadensis, Lathyrus palustris, Lathyrus venosus,
Lechea minor, Lechea mucronata, Lechea racemulosa, Leiophyllum buxifolium, Lepidium
densiflorum, Lepidium virginicum, Lespedeza angustifolia, Lespedeza capitata, Lespedeza
frutescens, Lespedeza hirta, Lespedeza repens, Lespedeza stuevei, Lespedeza violacea,
Lespedeza virginica, Liatris pilosa, Liatris spicata, Limosella australis, Lindera benzoin,
Lindernia dubia, Linum intercursum, Linum striatum, Linum virginianum, Liquidambar
styraciflua, Liriodendron tulipifera, Lobelia canbyi, Lobelia cardinalis, Lobelia inflate, Lobelia
nuttallii, Lobelia spicata, Ludwigia alternifolia, Ludwigia hirtella, Ludwigia palustris, Ludwigia
sphaerocarpa, Lupinus perennis, Lycopus americanus, Lycopus amplectens, Lycopus rubellus,
Lycopus uniflorus, Lycopus virginicus, Lyonia ligustrina, Lyonia mariana, Lysimachia ciliate,
Lysimachia hybrid, Lysimachia quadrifolia, Lysimachia terrestris, Lysimachia thyrsiflora,
Magnolia tripetala, Magnolia virginiana, Melampyrum lineare, Menispermum canadense,
Mentha ×piperita, Mentha arvensis, Menyanthes trifoliate, Micranthemum micranthemoides,
Mikania scandens, Mimulus alatus, Mimulus ringens, Minuartia caroliniana, Mirabilis
nyctaginea, Mitchella repens, Moehringia lateriflora, Mollugo verticillata, Monarda punctata,
Monotropa hypopithys, Monotropa uniflora, Morella caroliniensis, Morella cerifera, Morella
pensylvanica, Morus rubra, Myosotis laxa, Myosotis verna, Myrica gale, Myriophyllum humile,
Myriophyllum pinnatum, Myriophyllum tenellum, Nelumbo lutea, Nuphar lutea, Nuttallanthus
Canadensis, Nymphaea odorata, Nyssa sylvatica, Obolaria virginica, Oclemena nemoralis,
Oenothera biennis, Oenothera fruticosa, Oenothera laciniata, Oenothera perennis, Oldenlandia
uniflora, Oligoneuron rigidum, Onosmodium virginianum, Opuntia humifusa, Orthilia secunda,
Osmorhiza claytonia, Osmorhiza longistylis, Oxalis dillenii, Oxalis stricta, Oxypolis rigidior,
Packera aurea, Packera obovata, Packera paupercula, Panax trifolius, Paronychia Canadensis,
Paronychia fastigiata, Parthenocissus quinquefolia, Pedicularis Canadensis, Pedicularis
lanceolata, Penstemon hirsutus, Penstemon laevigatus, Penthorum sedoides, Phlox divaricata,
Phlox maculate, Phlox pilosa, Phlox subulata, Phoradendron leucarpum, Photinia floribunda,
Photinia melanocarpa, Photinia pyrifolia, Phryma leptostachya, Physalis heterophylla, Physalis
longifolia, Physalis pubescens, Physocarpus opulifolius, Phytolacca Americana, Pilea Fontana,
Pilea pumila, Plantago aristata, Plantago pusilla, Plantago virginica, Platanus occidentalis,
Pluchea foetida, Podophyllum peltatum, Polemonium reptans, Polygala brevifolia, Polygala
cruciata, Polygala incarnate, Polygala lutea, Polygala mariana, Polygala nuttallii, Polygala
polygama, Polygala sanguine, Polygala senega, Polygala verticillata, Polygonella articulate,
Polygonum amphibium, Polygonum arifolium, Polygonum careyi, Polygonum erectum,
Polygonum hydropiperoides, Polygonum lapathifolium, Polygonum pensylvanicum, Polygonum
punctatum, , Polygonum robustius, Polygonum sagittatum, Polygonum tenue, Populus
grandidentata, Populus tremuloides, Potentilla arguta, Potentilla Canadensis, Potentilla
norvegica, Potentilla simplex, Prenanthes altissima, Prenanthes autumnalis, Prenanthes
serpentaria, Prenanthes trifoliolata, Proserpinaca intermedia, Proserpinaca palustris,
Proserpinaca pectinata, Prunella vulgaris, Prunus Americana, Prunus angustifolia, Prunus
maritime, Prunus pumila, Prunus serotina, Pseudognaphalium helleri, Pseudognaphalium
obtusifolium, Ptilimnium capillaceum, Pycnanthemum clinopodioides, Pycnanthemum incanum,
Pycnanthemum muticum, Pycnanthemum tenuifolium, Pycnanthemum verticillatum,
Pycnanthemum virginianum, Pyrola Americana, Pyrola chlorantha, Pyrola elliptica,
Pyxidanthera barbulata, Quercus alba, Quercus coccinea, Polygonum pensylvanicum,
Polygonum punctatum, Polygonum robustius, Polygonum sagittatum, Polygonum tenue, Populus
grandidentata, Populus tremuloides, Potentilla arguta, Potentilla Canadensis, Potentilla
norvegica, Potentilla simplex, Prenanthes altissima, Prenanthes autumnalis, Prenanthes
serpentaria, Prenanthes trifoliolata, Proserpinaca intermedia, Proserpinaca palustris,
Proserpinaca pectinata, Prunella vulgaris, Prunus Americana, Prunus angustifolia, Prunus
maritime, Prunus pumila, Prunus serotina, Pseudognaphalium helleri, Pseudognaphalium
obtusifolium, Ptilimnium capillaceum, Pycnanthemum clinopodioides, Pycnanthemum incanum,
Pycnanthemum muticum, Pycnanthemum tenuifolium, Pycnanthemum verticillatum,
Pycnanthemum virginianum, Pyrola Americana, Pyrola chlorantha, Pyrola elliptica,
Pyxidanthera barbulata, Quercus alba, Quercus coccinea, Quercus ilicifolia, Quercus
marilandica, Quercus michauxii, Quercus palustris, Quercus phellos, Quercus prinoides,
Quercus prinus, Quercus rubra, Quercus stellata, Ranunculus ambigens, Ranunculus hispidus,
Ranunculus longirostris, Ranunculus pensylvanicus, Ranunculus pusillus, Ranunculus
recurvatus, Ranunculus sceleratus, Ranunculus trichophyllus, Rhexia mariana, Rhexia virginica,
Rhododendron maximum, Rhododendron periclymenoides, Rhododendron prinophyllum,
Rhododendron viscosum, Rhus copallinum, Rhus glabra, Rhus typhina, Ribes americanum,
Robinia pseudoacacia, Robinia viscose, Rorippa palustris, Rosa Carolina, Rotala ramosior,
Rubus Canadensis, Rubus cuneifolius, Rubus flagellaris, Rubus hispidus, Rubus occidentalis,
Rudbeckia hirta, Rudbeckia laciniata, Rumex altissimus, Rumex orbiculatus, Sabatia angularis,
Sabatia difformis, Sagina decumbens, Salix bebbiana, Salix discolor, Salix eriocephala, Salix
humilis, Salix interior, Salix nigra, Salix petiolaris, Salix sericea, Salvia lyrata, Sanguinaria
Canadensis, Sanguisorba Canadensis, Sanicula Canadensis, Sanicula marilandica, Sarracenia
purpurea, Saururus cernuus, Saxifraga pensylvanica, Saxifraga virginiensis, Schwalbea
Americana, Scrophularia lanceolata, Scrophularia marilandica, Scutellaria elliptica, Scutellaria
galericulata, Scutellaria integrifolia, Scutellaria lateriflora, Senna hebecarpa, Sericocarpus
asteroids, Sericocarpus linifolius, Sicyos angulatus, Sida spinosa, Silene antirrhina, Silene
stellata, Sium suave, Solanum carolinense, Solanum ptycanthum, Solanum rostratum, Solidago
bicolor, Solidago caesia, Solidago erecta, Solidago fistulosa, Solidago flexicaulis, Solidago
gigantean, Solidago juncea, Solidago latissimifolia, Solidago nemoralis, Solidago odora,
Solidago patula, Solidago puberula, Solidago rugosa, Solidago sempervirens, Solidago stricta,
Solidago uliginosa, Solidago ulmifolia, Spergularia salina, Spiraea alba, Stachys hyssopifolia,
Stachys palustris, Stachys tenuifolia, Staphylea trifolia, Stellaria longifolia, Stellaria pubera,
Strophostyles helvola, Strophostyles umbellate, Stylosanthes biflora, Symphyotrichum
cordifolium, Symphyotrichum dumosum, Symphyotrichum ericoides, Symphyotrichum leave,
Symphyotrichum lanceolatum, Symphyotrichum lateriflorum, Symphyotrichum novi-belgii,
Symphyotrichum patens, Symphyotrichum pilosum, Symphyotrichum puniceum, Symphyotrichum
subulatum, Symphyotrichum undulatum, Teucrium canadense, Thalictrum pubescens, Thalictrum
revolutum, Thalictrum thalictroides, Thaspium barbinode, Thaspium trifoliatum, Tilia
Americana, Toxicodendron pubescens, Toxicodendron radicans, Toxicodendron vernix,
Triadenum virginicum, Trichostema brachiatum, Trichostema dichotomum, Trichostema
setaceum, Trientalis borealis, Triodanis perfoliata, Ulmus Americana, Ulmus rubra, Utricularia
geminiscapa, Utricularia gibba, Utricularia intermedia, Utricularia juncea, Utricularia
macrorhiza, Utricularia purpurea, Utricularia radiate, Utricularia striata, Utricularia subulata,
Vaccinium angustifolium, Vaccinium corymbosum, Vaccinium fuscatum, Vaccinium
macrocarpon, Vaccinium stamineum, Valerianella umbilicata, Verbena hastate, Verbena
simplex, Verbena urticifolia, Verbesina alternifolia, Veronica anagallis-aquatica, Veronica
peregrine, Veronica scutellata, Veronicastrum virginicum, Viburnum acerifolium, Viburnum
dentatum, Viburnum nudum, Viburnum prunifolium, Viola ×palmate, Viola affinis, Viola
bicolor, Viola blanda, Viola brittoniana, Viola cucullata, Viola hirsutula, Viola labradorica,
Viola lanceolata, Viola macloskeyi, Viola pedata, Viola pubescens, Viola sagittata, Viola triloba,
Vitis aestivalis, Vitis labrusca, Vitis riparia, Vitis vulpine, Xanthium strumarium, and Zizia
aptera.
In another embodiment, the use and method of the present invention is effective against
dicotyledonous weeds selected from Cirsium arvense, Taraxacum officinale, Ranunculus repens,
Senecio vulgaris, Papaver rohoeas, Veronica persica, Matricaria sp., Fallopia Convolvulus,
Veronica arvensis, Veronica hederofolia, Stellaria media and Polygonum convolvulus.
Also described herein is a herbicidal composition comprising D Napropamide and agronomically
acceptable excipients. These compositions were found useful in the practice of the enhanced use
and improved method of the present invention. The agronomically acceptable excipients may be
selected from carriers, inert materials, organic or inorganic solvents, minerals, mixed solvents,
wetting agents and/or emulsifying agents, adhesive agents, anti-caking agents, deflocculating
agents, and the like. The herbicidal composition may be formulated in the form of solid and
liquid formulations.
In another aspect, the present invention provides a herbicidal combination comprising
Napropamide-M along with a second herbicide selected from;
(i) S-Metolachlor
(ii) Metolachlor
(iii) Clomazone;
(iv) Flufenacet;
(v) Diflufenican;
(vi) Flufenacet + Diflufenican;
(vii) Benfluraline;
(viii) Quinmerac;
(ix) Metazachlor;
(x) Quinmerac + Metazachlor;
(xi) Glufosinate;
(xii) Metribuzin;
(xiii) Clomazone + S-Metolachlor;
(xiv) Dimethachlor;
(xv) Benazolin;
(xvi) Carbetamide;
(xvii) Clethodim;
(xviii) Cycloxydim;
(xix) Sethoxydim;
(xx) Clopyralid;
(xxi) Cyanazine;
(xxii) Simazine;
(xxiii) Diclofop;
(xxiv) Fenoxaprop-P;
(xxv) Fluazifop-P;
(xxvi) Haloxyfop-P;
(xxvii) Propaquizafop;
(xxviii) Quizalafop;
(xxix) Dimefuron;
(xxx) Flumetsulam;
(xxxi) Propyzamide;
(xxxii) Pyridate;
(xxxiii) Trifluralin;
(xxxiv) Pethoxamid
(xxxv) Pendimethalin
(xxxvi) Clomazone + Dimethachlor and
(xxxvii) Clomazone + Metazachlor.
It was surprisingly found that a broad-spectrum herbicide effect was achieved with a reduced
overall amount of active ingredient when Napropamide-M was combined with a second
herbicide.
Also described herein is a herbicide combination which comprises:
(a) D-Napropamide; and
(b) a second herbicide which is active against monocotyledonous weeds.
In an embodiment, the second herbicide selected is such that not only it is active against
monocotyledonous weeds but is, preferably, relatively more active against monocotyledonous
weeds than dicotyledonous weeds.
Further, following the finding of the present invention that D-Napropamide has enhanced
activity specifically against dicotyledonous weeds, it is possible to formulate the herbicide such
that it is active in controlling dicotyledonous weeds, yet is less active (preferably substantially
inactive) against monocotyledonous plant species. Accordingly, the present invention also
provides the use of D-Napropamide for the control of a dicotyledonous weed at a locus, wherein
the D-Napropamide is applied in an amount such that it is effective in controlling said
dicotyledonous weed, yet is less active (preferably substantially inactive) against
monocotyledonous plant species.
Typically, said monocotyledonous plant species may be a crop plant.
In this embodiment, the activity of the D-Napropamide against the monocotyledonous plant
species is typically such that the mean final foliar fresh weight of the monocotyledonous plant
species 21 days after application of the D-Napropamide is 70% or more, more typically 80% or
more, preferably 90% or more, than the weight obtained with untreated plants.
In an embodiment, the second herbicide is selected from but not limited to, clomazone, a urea
herbicide, a triazine herbicide, a trizinone herbicide, a hydroxybenzonitrile herbicide, a
thiocarbamate herbicide, a pyridazine herbicide, chloroacetanilide herbicides; benzothiazole
herbicides; carbanilate herbicides, cyclohexene oxime herbicides; picolinic acid herbicides;
pyridine herbicides; quinolinecarboxylic acid herbicides; chlorotriazine herbicides,
aryloxyphenoxypropionic herbicides, oxadiazolone herbicides; phenylurea herbicides,
sulfonanilide herbicides; triazolopyrimidine herbicides, amide herbicides, pyridazine herbicides,
dinitroaniline herbicides or combinations thereof.
In another preferred embodiment the present invention provides a herbicidal combination which
comprises:
(a) D-Napropamide; and
(b) Clomazone.
In another preferred embodiment the present invention provides a herbicidal combination which
comprises:
(a) D-Napropamide; and
(b) Benfluralin.
Also described herein is use of combination comprising combination of D- Napropamide and a
second herbicide for the control of weeds at a locus.
Also described herein is a method of controlling the weed infestation at a locus by treating with a
combination comprising combination of D-Napropamide and a second herbicide.
In another preferred embodiment the present invention provides a herbicidal combination which
comprises:
(a) D-Napropamide; and
(b) Clomazone.
In a preferred embodiment, clomazone is combined with Napropamide-M as an encapsulated
capsule suspension. In one embodiment, the capsule suspension formulation of clomazone is as
described in US Reissue Patent No. RE38675, US Patent No. 5583090, US Patent No. 5783520
or PCT Publication No. WO/2011/121407, all of which are incorporated herein by reference.
Also described herein is a herbicidal combination comprising (a) Napropamide-M; (b) an urea
herbicide selected from benzthiazuron, cumyluron, cycluron, dichloralurea, diflufenzopyr,
isonoruron, isouron, methabenzthiazuron, monisouron, noruron, anisuron, buturon,
chlorbromuron, chloreturon, chlorotoluron, chloroxuron, daimuron, difenoxuron, dimefuron,
diuron, fenuron, fluometuron, fluothiuron, isoproturon, linuron, methiuron, methyldymron,
metobenzuron, metobromuron, metoxuron, monolinuron, monuron, neburon, parafluron,
phenobenzuron, siduron, tetrafluron, thidiazuron, amidosulfuron, azimsulfuron, bensulfuron,
chlorimuron, cyclosulfamuron, ethoxysulfuron, flazasulfuron, flucetosulfuron, flupyrsulfuron,
foramsulfuron, halosulfuron, imazosulfuron, mesosulfuron, metazosulfuron, methiopyrisulfuron,
monosulfuron, nicosulfuron, orthosulfamuron, oxasulfuron, primisulfuron, propyrisulfuron,
pyrazosulfuron, rimsulfuron, sulfometuron, sulfosulfuron, trifloxysulfuron, zuomihuanglong,
chlorsulfuron, cinosulfuron, ethametsulfuron, iodosulfuron, iofensulfuron, metsulfuron,
prosulfuron, thifensulfuron, triasulfuron, tribenuron, triflusulfuron, tritosulfuron, buthiuron,
ethidimuron, tebuthiuron, thiazafluron and thidiazuron; and (c) an agriculturally acceptable
carrier or diluent.
In an embodiment, the present invention provides a combination comprising (a) Napropamide-
M; and (b) dimefuron.
In an embodiment, Napropamide-M is combined with a triazine herbicide selected from the
group consisting of dipropetryn, fucaojing, trihydroxytriazine, atrazine, chlorazine, cyanazine,
cyprazine, eglinazine, ipazine, mesoprazine, procyazine, proglinazine, propazine, sebuthylazine,
simazine, terbuthylazine, trietazine, indaziflam, triaziflam, atraton, methometon, prometon,
secbumeton, simeton, terbumeton, ametryn, aziprotryne, cyanatryn, desmetryn, dimethametryn,
methoprotryne, prometryn, simetryn and terbutryn.
Also described herein is a combination comprising (a) Napropamide-M; and triazinone
herbicide, selected from ametridione, amibuzin, ethiozin, hexazinone, isomethiozin, metamitron,
metribuzin.
In an embodiment, the present invention provides a combination comprising (a) Napropamide-
M; and (b) metribuzin.
In another embodiment, Napropamide-M may be combined with a nitrile herbicide selected from
bromobonil, bromoxynil, chloroxynil, dichlobenil, iodobonil, ioxynil and pyraclonil.
In an embodiment, Napropamide-M may be combined with a thiocarbamate herbicide selected
from dazomet and metam.
In another embodiment, Napropamide-M may be combined with a pyridazine herbicide selected
from credazine, cyclopyrimorate, pyridafol and pyridate.
In another embodiment, Napropamide-M may be combined with a chloroacetanilide herbicide
selected from acetochlor, alachlor, butachlor, butenachlor, delachlor, diethatyl, dimethachlor,
ethachlor, ethaprochlor, metazachlor, metolachlor, S-metolachlor, pretilachlor, propachlor,
propisochlor, prynachlor, terbuchlor, thenylchlor and xylachlor.
In an embodiment, the present invention provides a combination comprising (a) Napropamide-
M; and (b) Metolachlor.
In an embodiment, the present invention provides a combination comprising (a) Napropamide-
M; and (b) S-metolachlor.
In an embodiment, the present invention provides a combination comprising (a) Napropamide-
M; and (b) Metazachlor.
In another embodiment, Napropamide-M may be combined with a benzothiazole herbicide
selected from benazolin, benzthiazuron, fenthiaprop, mefenacet and methabenzthiazuron.
In another embodiment, Napropamide-M may be combined with a carbanilate herbicide selected
from a carbanilate herbicide selected from barban, BCPC, carbasulam, carbetamide, CEPC,
chlorbufam, chlorpropham, CPPC, desmedipham, phenisopham, phenmedipham,
phenmedipham-ethyl, propham and swep.
In another embodiment, Napropamide-M may be combined with a cyclohexene oxime herbicide
selected from alloxydim, butroxydim, clethodim, cloproxydim, cycloxydim, profoxydim,
sethoxydim, tepraloxydim and tralkoxydim.
In another embodiment, Napropamide-M may be combined with a picolinic acid herbicide
selected from aminopyralid, clopyralid, halauxifen and picloram.
In an embodiment, Napropamide-M may be combined with a pyridine herbicide selected from
aminopyralid, cliodinate, clopyralid, diflufenican, dithiopyr, flufenican, fluroxypyr, halauxifen,
haloxydine, picloram, picolinafen, pyriclor, pyroxsulam, thiazopyr and triclopyr.
In an embodiment, the present invention provides a combination comprising (a) Napropamide-
M; and (b) diflufenican.
In an embodiment, Napropamide-M may be combined with a quinoline carboxylic acid herbicide
selected from quinclorac and quinmerac.
In an embodiment, the present invention provides a combination comprising (a) Napropamide-
M; and (b) quimerac.
In another embodiment, Napropamide-M may be combined with an aryloxyphenoxypropionic
acid herbicide selected from cloprop, 4-CPP, dichlorprop, dichlorprop-P, 3,4-DP, fenoprop,
mecoprop, mecoprop-P, chlorazifop, clodinafop, clofop, cyhalofop, diclofop, fenoxaprop,
fenoxaprop-P, fenthiaprop, fluazifop, fluazifop-P, haloxyfop, haloxyfop-P, isoxapyrifop,
kuicaoxi, metamifop, propaquizafop, quizalofop, quizalofop-P and trifop.
In another embodiment, Napropamide-M may be combined with a oxadiazolone herbicide
selected from dimefuron, methazole, oxadiargyl and oxadiazon.
In another embodiment, Napropamide-M may be combined with a sulfoanilide herbicide selected
from benzofluor, cloransulam, diclosulam, florasulam, flumetsulam, metosulam, perfluidone,
profluazol and pyrimisulfan.
In another embodiment, Napropamide-M may be combined with a triazolopyrimidine herbicide
selected from cloransulam, diclosulam, florasulam, flumetsulam, metosulam, penoxsulam and
pyroxsulam.
In another embodiment, Napropamide-M may be combined with amide herbicides selected from
allidochlor, amicarbazone, beflubutamid, benzadox, benzipram, bromobutide, cafenstrole,
CDEA, cyprazole, dimethenamid, dimethenamid-P, diphenamid, epronaz, etnipromid,
fentrazamide, flucarbazone, flupoxam, fomesafen, halosafen, huangcaoling, isocarbamid,
isoxaben, naptalam, pethoxamid, propyzamide, quinonamid, saflufenacil, tebutam and tiafenacil.
In an embodiment, the present invention provides a combination comprising (a) Napropamide-
M; and (b) pethoxamid.
In another embodiment, Napropamide-M may be combined with a pyridazine herbicide selected
from credazine, cyclopyrimorate, pyridafol and pyridate.
In an embodiment, Napropamide-M may be combined with glufosinate. An additional advantage
demonstrated by this combination was that Napropamide-M acted pre-emergence while any
weeds emerged was quickly killed by the glufosinate component thereby rendering the pre-
emergent herbicide Napropamide-M active yet again. Therefore, the combination of
Napropamide-M with glufosinate was found to be surprisingly efficacious as a pre-emergent and
broad spectrum post-emergent herbicide.
In yet another embodiment, Napropamide-M may be combined with a dinitroaniline herbicide
selected from benfluralin, butralin, chlornidine, dinitramine, dipropalin, ethalfluralin,
fluchloralin, isopropalin, methalpropalin, nitralin, oryzalin, pendimethalin, prodiamine,
profluralin and trifluralin.
In an embodiment, the present invention provides a combination comprising (a) Napropamide-
M; and (b) pendimethalin.
In another embodiment, Napropamide-M may be combined with a third herbicide. The third
herbicide may be selected from the herbicides listed above in any of the embodiments although
the second and third herbicides may not be the same.
In yet another preferred embodiment the present invention further comprises third herbicide
selected from clomazone, chloroacetanilide herbicides; pyrazole herbicides; quinolinecarboxylic
acid herbicides and amide herbicides.
In this embodiment, the chloroacetanilide herbicide, pyrazole herbicides, quinoline carboxylic
acid herbicide and amide herbicide may be selected from the list of compounds defined in the
embodiments described above for these classes of compounds.
Also described herein is a herbicide combination which comprises:
(c) D-Napropamide;
(d) a second herbicide ; and
(e) a third herbicide.
In yet another embodiment the present invention provides a ternary herbicidal combination
which comprises D-Napropamide; benfluralin; and clomazone.
In yet another embodiment the present invention provides a ternary herbicidal combination
which comprises D-Napropamide; dimethachlor; and clomazone.
In yet another embodiment the present invention provides a ternary herbicidal combination
which comprises D-Napropamide; Metazachlor; and Quinmerac.
The compound Napropamide-M is known in the art and can be prepared by any of the known
methods such as the one disclosed in WO2009004642, which is incorporated herein by reference
in its entirety.
The invention will now be explained in more detail in the following examples that illustrate, but
are not intended to limit, the invention.
EXAMPLES:
Field trials were conducted on various moncotyledonous weeds and dicotyledonous weeds and
the effect of D-isomer of Napropamide was studied to understand the selective and effective
control of dicotyledonous weeds over monocotyledonous weeds. The effect of D-isomer of
Napropamide in comparison to racemic napropramide and untreated was studied, which is
concluded hereinbelow:
STATISTICAL ANALYSIS MODEL:
Several small plot replicated trials were carried out to evaluate and/or compare the efficacy of D-
Napropamide against a range of indicated annual broadleaved and grass weed species in the
indicated crops. No problems were encountered during mixing or application of any of the
product formulations or tank mixtures under test.
In each of the reported data, the homogeneity of variance was tested by Bartlett’s test. Wherever
this test indicated no homogeneity of variance, the transformed values were used for analysis of
variance. Assessment data was then analyzed using a two-way analysis of variance (ANOVA) on
untransformed and transformed data. The probability of no significant differences occurring
between treatment means was calculated as the F probability value (p(F)). A mean comparison
test was only performed and reported when the treatment of F that was calculated during analysis
of variance was significant at the observed significance level specified for the mean comparison
test. Where the data was transformed, treatment means in the reports were presented in their
detransformed state, with the appropriate letter test and mean descriptions (LSD and standard
deviation) derived from the transformed ANOVA.
Example 1: Controlled Trial: Comparative effect of D- isomer of Napropamide and
Napropamide for controlling Stellaria media (dicot weed) and Poa annua (monocot weed)
A study was carried out to determine the relative biological activity of the D and L isomers of
Napropamide when applied pre-emergence to one monocotyledon and one dicotyledon species.
Napropamide, containing 450 grammes active substance per litre (g a.s./L) formulated as a
suspension concentrate and the D-isomer of Napropamide (1000 g a.s./L) were applied at a range
of concentrations from 0.1575 to 1.26 kilograms of active substance per hectare (kg a.s/Ha).
EC values in kg a.s./Ha were calculated from the dose response data using final foliar fresh
weight data for each species and was used to determine the relative biological activity of the D
and L isomers of Napropamide. The methodology was based on the OECD guideline 2008,
according to the revision of July 2006 for seedling emergence and growth. The study was
conducted to GLP standards.
Seeds were sown directly into non-porous plastic pots containing the following mix of soil: 10 L
of sterile loam + 4 L of coarse grit (washed quartztite, nominal 4 mm) + 10 L of sand. This soil
mix was characterized as a sandy loam with an organic carbon content of 1.5% and pH of 7.2.
Details of the plant species, number of seeds per pot and pot size are shown below. All seeds
were sown 1-2 cm deep.
Details of plant species
Weed type Species Common name Variety Seeds/pot Pot size
(Source)
Poa annua Meadow grass Herbiseed 4 7 X 7 X 8 cm
Monocotyledon
Stellaria media Chickweed Herbiseed 6 7 X 7 X 8 cm
Dicotyledon
The highest concentration of Napropamide was prepared by measuring a calculated volume by
weight and diluting with tap water to the full required volume. Lower concentrations were
prepared by serial dilution with water. D-Napropamide was prepared by dissolving the calculated
weight in acetone and adding water to give the full required volume in 50:50 acetone + water.
Lower concentrations were prepared by serial dilution with 50:50 acetone + water. D-
Napropamide dissolved completely.
Preparation of the Highest Rate Spray Solutions for Poa annua
Test item Active Rate Application Amount Volume
Ingredient volume weighed prepared
450 g as/L 1.26 kg as/L 193.12 L/Ha 6.321 g 400 mL
Napropamide
(water)
1000 g as/kg 1.26 kg as/L 193.12 L/Ha 2.611 g 400 mL
(acetone
Napropamide
+water)
Preparation of Highest Rate Spray Solutions for Stellaria media
Test item Active Rate Application Amount Volume
ingredient volume weighed prepared
450 g as/L 1.26 kg as/L 196.17 L/Ha 6.223 g 400 mL
Napropamide
(water)
1000 g as/kg 1.26 kg as/L 196.17 L/Ha 2.569 g 400 mL
(acetone
Napropamide
+water)
The sprayer was calibrated within 24 hours prior to application by weight of 15 applications of
water to six 86 mm ID petri dishes. The total weight of water over a known area enabled a
simple calculation giving the volume rate to be made. The volume rate achieved was within the
range specified in the study plan (200 L/Ha ± 10%).
Replication was 5 pots per treatment for each plant species. After application, pots were placed
on the bench in glasshouse in randomized blocks. Plants were assessed for emergence, mortality
and visual injury (expressed as a percentage of the untreated control: 0% = no injury, 1-39% =
slight injury, 40 – 69% = moderate injury, 70 – 99% = severe injury and 100% = all plants dead)
at 14 and 21 days after 50% emergence in the untreated controls. Fresh weights (biomass above
soil level) were also recorded 21 days after 50% emergence in the untreated controls. Plants were
fully turgid at the time of harvest.
1. Mean final foliar fresh weights (g)
Treatment Rate (kg/Ha) Poa Stellaria
annua media
Acetone + Water 0.90 1.44
Untreated
0.1575 0.93 0.498
D-Napropamide
0.315 0.64 0.198
D-Napropamide
0.63 0.45 0.17
D-Napropamide
0.315 0.57 0.3
Napropamide
0.63 0.98 0.328
Napropamide
D–Napropamide demonstrates distribution of enhanced activity towards control of dicot weed
vis-à-vis only a moderate selectivity towards monocot weed in comparison with Napropamide.
2. Mean final foliar fresh weights expressed as percentage of untreated controls:
Treatment Rate (kg/Ha) Poaannua Stellaria media
Untreated Acetone + Water 100 100
0.1575 100 35
d-Napropamide
0.315 71 14
d-Napropamide
0.630 50 12
d-Napropamide
0.1575 100 70
Napropamide
1.26 23 16
Napropamide
D – Napropamide demonstrates distribution of enhanced activity towards control of dicot weed
vis-à-vis only a moderate selectivity towards monocot weed in comparison with Napropamide.
Assessment data was recorded on pro-forma sheets and entered into Gylling ARM 7 software.
EC values were calculated using audited means data from the final assessments (21 day).
Gylling ARM 7.0 software used a simple probit – maximum likelihood estimation method with
99% confidence level. The EC values generated were then visually checked against the means
data table to verify they appeared correct.
EC values in kg as/ha based on the final fresh weights
Type of weed Species Common name EC (kg/Ha)
Poa annua Meadow grass d- 0.44
Monocot
Napropamide
1.26
Napropamide
Napropamide 0.72
Stellaria media Chickweed d- 0.054
Dicot
Napropamide
L- 1.26
Napropamide
Napropamide 0.22
Conclusion: D – Napropamide demonstrates distribution of enhanced activity towards control of
dicot weed vis-à-vis only a moderate selectivity towards monocot weed in comparison with
Napropamide. D-Napropamide was found about 1.63 times more active than racemic
Napropamide and 2.86 more active than L-Napropamide in monocotyledonous weeds.
Surprisingly, D-Napropamide was found to be about 4.07 times more active than racemic
Napropamide and 23.33 times more active than L-Napropamide in dicotyledonous weeds. The
degree of enhancement in efficacy seen over racemic Napropamide and L-Napropamide towards
the control of dicotyledonous weeds was surprising. Equally surprising was a clear trend of
differentiated selectivity of D-Napropamide towards the control of dicotyledonous weeds vis-à-
vis the control of monocotyledonous weeds.
Example 2: Selectivity of D- Napropamide for controlling Ranunculus repens, Senecio vulgaris
and Papaver rhoeas (dicotyledonous weed) in strawberry farm:
Trial was carried out on strawberries to evaluate the efficacy and selectivity of D- Napropamide
and equivalent rate of Devrinol (Napropramide) applied pre-emergence. Efficacy was assessed
visually after the emergence of significantly new growth in untreated plot. The percentage
control of D- isomer of Napropamide and Devrinol was assessed in comparison to the untreated
after 224 days after application.
Table 2: Mean Percentage Control of Ranunculus repens (dicotyledonous weed)
S No. Treatment Percentage Treatment Percentage
Control at 224 Control at 224
DAA DAA
Untreated 0.00
Napropamide 5 33.3 D-Napropamide 66.7
L/Ha 3.0 L/Ha
Napropamide 7 66.7 D-Napropamide 100
L/Ha 4.2 L/Ha
Napropamide 14 83.3 D-Napropamide 100
L/Ha 8.5 L/Ha
4.640
LSD (P=0.5)
3.179
• The tested formulations contained 450 g/L of Napropamide and Napropamide-M
respectively.
Conclusion: D – Napropamide demonstrated surprising efficacy in the control of
Ranunculus repens vis-à-vis the control achieved by Napropamide at an equivalent
dosage.
Table 3: Mean Percentage Control of Senecio vulgaris:
S No. Treatment Percentage Treatment Percentage
Control at 70 Control at 70
DAA DAA
Untreated 0.00
Napropamide 5 37.5 D-Napropamide 75.0
L/Ha 3.0 L/Ha
Napropamide 7 25.0 D-Napropamide 50.0
L/Ha 4.2 L/Ha
Napropamide 14 12.5 D-Napropamide 75.0
L/Ha 8.5 L/Ha
• The tested formulations contained 450 g/L of Napropamide and Napropamide-M
respectively.
Conclusion: D – Napropamide demonstrated surprising efficacy in the control of Senecio
vulgaris, a dicotyledonous weed, vis-à-vis the control achieved by Napropamide at an
equivalent dosage.
Table 4:Mean Percentage Control of Papaver rhoeas:
S No. Treatment Percentage Treatment Percentage
Control at 70 Control at 70
DAA DAA
Untreated 0.00
Napropamide 5 62.5 D-Napropamide 71.7
L/Ha 3.0 L/Ha
Napropamide 7 81.7 D-Napropamide 95.0
L/Ha 4.2 L/Ha
Napropamide 14 82.5 D-Napropamide 97.5
L/Ha 8.5 L/Ha
• The tested formulations contained 450 g/L of Napropamide and Napropamide-M
respectively.
Conclusion: D – Napropamide demonstrated surprising efficacy in the control of Papaver
rhoeas vis-à-vis the control achieved by Napropamide at an equivalent dosage.
Example 3: Selectivity of D- isomer of Napropamide for controlling annual broadleaved and
grass weed species in Winter Oilseed Rape:
Trials were conducted to evaluate the selectivity and efficacy of D- isomer of Napropamide
when applied pre-emergence to oilseed rape crop. The % control of weed was assessed at regular
intervals.
Table 5: Mean Percentage Control of Aperaspica-venti (Monocot Weed)
S No. Treatment Percentage Treatment Percentage
Control at 63 Control at 63
DAA DAA
Untreated 0.00
D Napropamide 35.00 Napropamide 1.6 40.00
450 g/L @ 1.4 L/Ha
L/Ha
D Napropamide 52.50 Napropamide 2.8 76.25
450 g/L @ 1.6 L/Ha
L/Ha
D-Napropamide 58.75 Napropamide 2.8 67.50
450 g/L @ 1.6 L/Ha
L/Ha
.367
LSD (P=0.5)
The tested formulations contained 450 g/L of Napropamide and Napropamide-M
respectively.
Conclusion: D – Napropamide demonstrates poor efficacy in the control of Aperaspica-venti, a
monocot weed, vis-à-vis the control achieved by Napropamide at an equivalent dosage.
Table 6: Mean Percentage Control of Veronica persica (dicot weed)
S No. Treatment Percentage Treatment Percentage
Control at 63 Control at 63
DAA DAA
Untreated 0.00
D Napropamide 100.00 Napropamide 1.6 75.00
450 g/L @ 1.4 L/Ha
L/Ha
D Napropamide 100.00 Napropamide 2.8 75.00
450 g/L @ 1.6 L/Ha
L/Ha
.367
LSD (P=0.5)
• The tested formulations contained 450 g/L of Napropamide and Napropamide-M
respectively.
Conclusion: D – Napropamide demonstrates superior efficacy in the control of Veronica
persica, a dicot weed, vis-à-vis the control achieved by Napropamide at an equivalent
dosage.
Table 7:Mean Percentage Control of Triticum aestivum (monocot weed).
Sr No. Treatment Percentage Treatment Percentage
Control at 51 Control at 72
DAA DAA
Untreated 0.00
D Napropamide 0.00 D Napropamide 0.00
450 g/L @ 1.4 450 g/L @ 1.4
L/Ha L/Ha
D Napropamide 0.00 D Napropamide 0.00
450 g/L @ 1.6 450 g/L @ 1.6
L/Ha L/Ha
4 D-Napropamide 0.00 D-Napropamide 0.00
450 g/L @ 1.8 450 g/L @ 1.8
L/Ha L/Ha
D-Napropamide 0.00 D-Napropamide 0.00
450 g/L @ 2.0 450 g/L @ 2.0
L/Ha L/Ha
0.000
LSD (P=0.5)
0.000
Conclusion: D – Napropamide demonstrates negligible control of Triticum aestivum, a
monocot weed.
Table 8:Mean Percentage Control of Cirsium arvense.
S No. Treatment Percentage
Control at 51
Untreated 0.00
D Napropamide 100.00 Napropamide 450 20.00
450 g/L @ 1.6 g/L @ 2.8 L/Ha
L/Ha
Conclusion: D – Napropamide demonstrates superior control of Cirsium arvense, a dicot
weed vis-à-vis a negligible control of the same weed with an equivalent dosage of
Napropamide.
Table 9: Mean Percentage Control of Senecio Vulgaris :
S No. Treatment Percentage Treatment Percentage
Control at 214 Control at 63
DAA DAA
Untreated 0.00
D Napropamide 94.72 Napropamide 450 36.96
450 g/L @ 1.6 g/L @ 1.6 L/Ha
L/Ha
D Napropamide 82.15 Napropamide 450 4.65
450 g/L @ 1.6 g/L @ 2.8 L/Ha
L/Ha
23.282
LSD (P=0.5)
16.046
Conclusion: D – Napropamide demonstrates superior efficacy in the control of Senecio
vulgaris, a dicot weed, vis-à-vis the control achieved by Napropamide at an equivalent
dosage.
Table 10: Mean Percentage Control of Matricaria sp.
S No. Treatment Percentage Treatment Percentage
Control at 49 ground cover %
Untreated 0.00 Untreated 4.50 (0.0%)
D Napropamide 97.00 D Napropamide 0.30 (99.3%)
450 g/L @ 2.0 450 g/L @ 2.0
L/Ha L/Ha
Napropamide 450 61.25 Napropamide 450 2.13 (52.8%)
g/L @ 2.8 L/Ha g/L @ 2.8 L/Ha
24.514 1.189
LSD (P=0.5)
16.862 0.818
Conclusion: D – Napropamide demonstrates superior efficacy in the control of
Matricaria sp., a dicot weed, vis-à-vis the control achieved by Napropamide at an
equivalent dosage.
Table 11:Mean Percentage Control of Fallopia convolvulus (a dicot weed):
S No. Treatment Percentage Treatment Percentage
Control at 63 control at 63
DAA DAA
Untreated 0.00 Untreated 0.00
D Napropamide 100.00 Napropamide 450 30.00
450 g/L @ 2.0 g/L @ 1.6 L/Ha
L/Ha
D Napropamide 100.00 Napropamide 450 0.00
450 g/L @ 1.6 g/L @ 2.8 L/Ha
L/Ha
Conclusion: D – Napropamide demonstrates superior efficacy in the control of Fallopia
convolvulus., a dicot weed, vis-à-vis the control achieved by Napropamide at an
equivalent dosage.
Example 4: Effect of D- isomer of Napropamide for controlling Digitaria sanguinalis (monocot
weed)
A plot with 20% density of Digitaria sanguinalis (monocot weed) was treated with D-
Napropamide and Racemic Napropamide formulations containing 450 g/L active ingredient and
the activity was noted after 60 days of application.
Table 12: Mean Percentage Control of Digitaria sanguinalis:
S No. Treatment % Control % Control
Treatment evaluation 16 DAA 33 DAA
interval
BBCH Weed 12 21
Groundcover (%) weed 4.75 7.00
D Napropamide 3 L/Ha 7.50 8.75
D Napropamide 4.5 L/Ha 10.00 10.00
D Napropamide 6 L/Ha 10.00 12.50
4 D Napropamide 7.5 L/Ha 10.00 11.25
D Napropamide 9 L/Ha 10.00 18.75
Napropamide 9 L/Ha 12.50 15.00
4.675 4.682
LSD (P=0.05)
3.162 3.107
Std. Dev.
CV 31.62 24.45
Conclusion: D – Napropamide is only as efficacious or less in comparison to Napropamide in
the control of monocotyledonous weeds.
Synergy studies:
Studies were conducted to compare the weed controlling activity of the combination of D-
Napropamide with various herbicides and compare its observed efficacy with the “expected”
efficacy when D-Napropamide and select individual herbicides were used to treat
monocotyledonous weeds. Any difference between the observed and “expected” efficacy could
be attributed to synergy between the two compounds in the control of monocotyledonous weeds.
The expected efficacy of a combination of D-Napropamide with select herbicides was calculated
using the well-established Colby method.
In the Colby method, the expected (or predicted) response of a combination of herbicides is
calculated by taking the product of the observed response for each individual component of the
combination when applied alone divided by 100 and subtracting this value from the sum of the
observed response for each component when applied alone. An unexpected enhancement in
efficacy of the combination is then determined by comparing the observed response of the
combination to the expected (or predicted) response as calculated from the observed response of
each individual component alone. If the observed response of the combination is greater than the
expected (or predicted) response, or stated conversely, if the difference between the observed
and expected response is greater than zero, then the combination is said to be synergistic or
unexpectedly effective. (Colby,S. R., Weeds, 1967(15), p. 20-22) The Colby method requires
only a single dose of each herbicide applied alone and the mixture of both doses. The formula
used to calculate the expected efficacy (EE) which was compared with the observed efficacy
(OE) to determine the efficacy of the present invention is explained hereinbelow:
EE=(B efficacy +A efficacy- (B efficacy x A efficacy)/100)
The weed control activity of the individual herbicides of the invention and their combinations
were evaluated on monocot weeds such as Digitaria sanguinalis (Weed code- DIGSA), Apera
spica-venti (Weed code- APESV), Triticum aestivum (Weed code – TTTT), Poa annua (Weed
code- POAAN) and Alopecurus myosuroides (Weed code ALOMY). The trial was carried out in
Randomized Complete Block (RCB) method, all field trials was conducted using this method.
Each trial were replicated four times and conducted under GEP guidelines. Application volume
was 300 L/ha, mixture size was 2.16 liters. Such field trials were carried out at three locations so
as to generate independent data, the locations were chosen randomly across European nations. D-
Napropamide was sprayed as 450 SC, whereas second selected herbicides herbicides were
sprayed according to their recommended dosage.
Example 5:
Trail 1:
Colby’s formula was applied to analyze results of the combination of D-Napropamide +
Clomazone. The combination was tested on POAAN and APESV weeds and the results are
reproduced in the table below. The numbers in brackets denote the actual weed counts.
S Dose % Weed control
r. APESV ALOMY
(untreated = 18.5 (untreated = 2.8 plants)
plants)
Active Rate Expected Actual Expected Actual
Unit
1 D-Napropamide 2 l - (2.3) 88 - (0.3) 91
450 SC
2 Clomazone 360 0.2 l - (18.0) 3.0 - (2.0) 27.0
3 D-Napropamide 2l + 88.36 (0.0) 100 93.43 (0.0) 100
+ Clomazone 360 0.2 l
Observed – Expected + 11.64 + 6.57
efficacy
Trail 2:
In trial 2, the combination of D-Napropamide with clomazone was tested for synergistic
herbicidal enhancement on the weeds ALOMY and POAAN. The weeds were selected due to
their infestation in the field selected for the trial. The results of this second trial are tabulated
below:
S Dose % Weed control
r. POAAN (untreated ALOMY
= 14.8 plants) (untreated = 2.5 plants)
Active Rate Expected Actual Expected Actual
Unit
1 D-Napropamide 2 l - (2.5) 83 - (0.5) 80
450 SC
2 Clomazone 360 0.2 l - (13.0) 12 - (2.3) 10
3 D-Napropamide 2l + 85.4 (4.3) 71 82 (0.0) 100
+ Clomazone 360 0.2 l
Observed – Expected + 18.0
- 14.4
efficacy
Weed control using a combination of D-Napropamide with Clomazone was found markedly
superior to the weed control achieved with individual application of D-Napropamide and
Clomazone in three out of four trials. Still more surprisingly, the expected efficacy and the actual
observed efficacy of the combination in the control of Alopecurus myosuroides (ALOMY) and
Apera spica-venti (APESV) was remarkably superior to the response from individual
applications of D-Napropamide and Clomazone alone, demonstrating synergy.
Example 6:
Another trial was conducted on the combination of D-Napropamide in combination with S-
Metolachlor on the control of various weeds. S-Metolachlor is a chloroacetanilide herbicide. The
results of this trial are tabulated below:
Trail 1:
Dose % Weed control
ALOMY POAAN (untreated
(untreated = 2.8 plants) = 23.3 plants)
Active Expected Actual Expected Actual
Rate
Unit
D-Napropamide - (0.3) 91 (4.8) 80
1 450 SC 2 l
S-Metolachlor - (2.5) 9 - (5.0) 78
2 960 EC 1 l
D-Napropamide 91.81 (0.0) 100 95.6 (1.0) 96
3 + 2l +
S-Metolachlor 1 l
960 EC
Observed efficacy – expected + 8.19 + 0.4
efficacy
Trail 2:
In trial 2, the combination of D-Napropamide with S-Metolachlor was tested for synergistic
herbicidal enhancement on the weeds ALOMY and POAAN. The weeds were selected due to
their infestation in the field selected for the trial. The results of this trial are tabulated below:
Dose % Weed control
Sr. ALOMY POAAN (untreated
(untreated = 2.5 plants) = 14.8 plants)
Active Expected Actual Expected Actual
Rate
Unit
D-Napropamide - (0.5) 80 (2.5) 83
1 450 SC 2 l
S-Metolachlor - (1.3) 50 - (3.3) 78
2 960 EC 1 l
D-Napropamide 90 (0.0) 100 96.24 (0.5) 97
3 + 2l +
S-Metolachlor 1 l
960 EC
Observed efficacy – + 10.0 + 0.76
expected efficacy
The observed efficacy in each case was greater than the expected response calculated using the
Colby method. S-Metolachlor + D-Napropamide was thus remarkably superior to the expected
response and was thus synergistic. S-Metolachlor being a chloroacetanilide herbicide, it could be
reasonably predicted that other chloroacetanilide herbicides would also demonstrate a similar
synergistic correlation with D-Napropamide.
Example 7:
Another trial was conducted to check weed activity of the combination of D-Napropamide and
Pendimethalin. The results of this trial are tabulated below:
Trail 1:
Dose % Weed control
Sr. ALOMY APESV
(untreated = 2.8 plants) (untreated = 18.5 plants)
Active Expected Actual Expected Actual
Rate
Unit
D-Napropamide - (0.3) 91 (2.3) 88
1 450 SC 2 l
Pendimethalin - (1.0) 64 - (8.5) 54
2 400 SC 1 l
D-Napropamide 96.76 (0.0) 100 94.48 (0.0) 100
3 + 2l +
Pendimethalin 1 l
400 SC
Observed efficacy – expected + 3.24 + 5.52
efficacy
In trial 2, the combination of D-Napropamide and pendimethalin were tested at a different
location concurrently with the first trial to corroborate the findings of the first trial. The weeds
were selected in accordance with their incidence in the tested field. The results of this trial are
summarized below:
Dose % Weed control
ALOMY POAAN (untreated
(untreated = 2.5 plants) = 14.8 plants)
Active Expected Actual Expected Actual
Rate
Unit
D-Napropamide - (0.5) 80 (2.5) 83
1 450 SC 2 l
Pendimethalin - (0.8) 70 - (13.8) 7
2 400 SC 1 l
D-Napropamide 94 (0.0) 100 84.19 (0.0) 100
3 + 2l +
Pendimethalin 1 l
400 SC
Observed efficacy – + 6.0 + 15.81
expected efficacy
The results of trials 1 and 2 clearly establish the superior efficacy of D-Napropamide in
combination with Pendimethalin. This superior efficacy can be artributed to synergism between
the two compounds, not seen in the single individual applications. Pendimethalin being a
dinitroaniline herbicide, it could be reasonably expected that other dinitroaniline herbicide would
demonstrate a similar potentiation of the activity of D-Napropamide.
Example 7:
Tank mixtures of D-Napropamide and diflufenican were used to control monocotyledonous
weeds. Field trials evaluated this mixture in comparison to each active ingredient alone and in a
comparative tank mixture of these same active ingredients. The table below summarizes the
results of this field trial:
Trail 1:
Sr. Dose % Weed control
ALOMY (untreated = APESV (untreated =
2.8 plants) 18.5 plants)
Active Rate Expected Actual Expected Actual
Unit
1 D- 2 l/ha - (0.3) 91 - (2.3) 88
Napropamide
450 SC
2 Diflufenican 0.4 - (1.5) 45 - (17.0) 8
500 g/L l/ha
3 D- 2l/ha 95.05 (0.0) 100 88.96 (0.0) 100
Napropamide + 0.4
+ Diflufenican l/ha
Observed efficacy – + 4.95 + 11.04
expected efficacy
Trial 2:
In another trial at another location, the combination of D-Napropamide and diflufenican was
evaluated for synergistic correlation to corroborate the findings of the first trials. The weeds were
selected based on the most prevalent infestation present at the test site. The results of this trial are
tabulated as hereunder
Sr. Dose % Weed control
ALOMY (untreated = POAAN (untreated =
2.5 plants) 14.8 plants)
Active Rate Expected Actual Expected Actual
Unit
1 D- 2 l/ha - (0.5) 80 - (2.5) 83
Napropamide
450 SC
2 Diflufenican 0.4 - (1.5) 40 - (13.0) 12
500 g/L l/ha
3 D- 2l/ha 88 (0.0) 100 85.04 (0.5) 97
Napropamide + 0.4
+ Diflufenican l/ha
Observed efficacy – + 12.0 + 11.96
expected efficacy
The trials 1 and 2 demonstrate the synergy between diflufenican and D-Napropamide in the
control of monocot weeds. The observed efficacy in each case was greater than the expected
response calculated using the Colby method. Diflufenican + D-Napropamide was thus
remarkably superior to the expected response and was thus synergistic. Diflufenican being a
representative anilide or pyridine herbicide, such synergy could be reasonably expected between
D-Napropamide and other anilide or pyridine herbicides described in the present application
Example 8:
Tank mixtures of D-Napropamide and metribuzin (70% granules) were used to control
monocotyledonous weeds. Field trials evaluated this mixture in comparison to each active
ingredient alone and in a comparative tank mixture of these same active ingredients. The table
below summarizes the results of this field trial:
Trail 1:
Sr. Dose % Weed control
APESV (untreated = POAAN (untreated =
18.5 plants) 23.3 plants)
Active Rate Expected Actual Expected Actual
Unit
1 D- 2 l/ha - (2.3) 88 - (4.8) 80
Napropamide
450 SC
2 Metribuzin 0.25 - (13.8) 26 - (23.8) -2
70% WG kg/ha
3 D- 2l/ha 93.12 (0.0) 100 79.6 (0.3) 99
Napropamide + 0.25
+ Metribuzin kg/ha
Observed efficacy – + 6.88 + 19.4
expected efficacy
Trail 2:
In another trial at another location, the combination of D-Napropamide and metribuzin was
evaluated for synergistic correlation to corroborate the findings of the first trials. The weeds were
selected based on the most prevalent infestation present at the test site. The results of this trial are
tabulated as hereunder:
Sr. Dose % Weed control
ALOMY (untreated = POAAN (untreated =
2.5 plants) 14.8 plants)
Active Rate Expected Actual Expected Actual
Unit
1 D- 2 l/ha - (0.5) 80 - (2.5) 83
Napropamide
450 SC
2 Metribuzin 0.25 - (1.8) 30 - (14.0) 5
70% WG kg/ha
3 D- 2l/ha 86 (0.0) 100 83.85 (0.0) 100
Napropamide + 0.25
+ Metribuzin kg/ha
Observed efficacy – + 14.0 + 16.15
expected efficacy
The trials 1 and 2 demonstrate the synergy between metribuzin and D-Napropamide in the
control of monocot weeds. This superior efficacy is artibuted to synergism between the two
compounds. Metribuzin, being a representative triazinone herbicide, such synergy could be
reasonably expected between D-Napropamide and other triazinone herbicides described in the
present application.
Example 9:
Field trials were carried out to test the efficacy of the combination of D-Napropamide and
Clomazone + Dimethachlor using tank mixtures of the individual compounds. The following
table demonstrates the results of the field trials:
Sr Dose % Weed control
TRZAW (untreated =
plants)
Active Rate Expected Actual
Unit
1 D-Napropamide
1.2 l - 40
450 SC
2 Clomazone (500
g/L ) +
2l - 50
Dimethachlor
(360 g/L)
3 D-Napropamide
450 SC
Clomazone (500 1.2l +
88 93
g/L ) + 2l
Dimethachlor
(360 g/L)
4 Observed efficacy –
+ 5.0
expected efficacy
It was thus found that the combination of D-Napropamide + Clomazone + Dimethachlor was
found to be synergistic wherein the observed efficacy against Tritium aestivum (TRZAW) was
higher than the expected efficacy of the combination. The combination demonstrated synergistic
correlation.
Example 10:
Broad spectrum effect of D-napropramid and Clomazone on Dicot and monocot weeds:
The effect of combination of D-napropramide and Clomazone was tested in the field, post
sowing of the seeds. The combnation of D-napropramide and Clomazone was tested at different
amounts on monocot and dicot weeds. The field was observed after 50 days, results of which are
reproduced herein below:
D-Napropramide( D-Napropramide
450 g/L SC @ 1.7 l (91 g/L MEC @
)+ Clomazone(360 8.41 l)+
g/L CS @ 0.25 l) (% Clomazone(360
control) g/L @ 0.25 l)(%
control)
ALOMY (19/m²)) Alopecurus 100 100
myosuroides Huds
(monocot);
LOLMU(192/m²) Lolium multiflorum 100 100
Lam (monocot)
PAPRH (15/m²) Papaver rhoeas L 100 100
CENCY (104/m²) Centaurea cyanus L. 100 100
(dicot)
GERPU (156/m²) Geranium pusillum 100 100
L.(dicot)
GERDI (148/m²) Geranium dissectum 100 98.3
L (dicot)
TRZAW (88/m²) Wheat (monocot) 100 98.3
HORVW (89/m²) Hordeum irregulare 100 100
Aberg & Wiebe
(monocot)
BARVU (78/m²) Barbarea vulgaris 100 100
Ait. f. (dicot)
It was concluded that the combination of D-Napropramide and Clomazone was very effective in
controlling both the dicot weeds and monocot weeds.
Claims (17)
1. A herbicide combination which comprises D-Napropamide; and a second herbicide selected from: (i) S-Metolachlor; (ii) Metolachlor; (iii)Clomazone; (iv) Flufenacet; (v) Diflufenican; (vi) Flufenacet + Diflufenican; (vii) Benfluraline; (viii) Quinmerac; (ix) Metazachlor; (x) Quinmerac + Metazachlor; (xi) Glufosinate; (xii) Metribuzin; (xiii) Clomazone + S-Metolachlor; (xiv) Dimethachlor; (xv) Benazolin; (xvi) Carbetamide; (xvii) Clethodim; (xviii) Cycloxydim; (xix) Sethoxydim; (xx) Clopyralid; (xxi) Cyanazine; (xxii) Simazine; (xxiii) Diclofop; (xxiv) Fenoxaprop-P; (xxv) Fluazifop-P; (xxvi) Haloxyfop-P; (xxvii) Propaquizafop; (xxviii)Quizalafop; (xxix) Dimefuron; (xxx) Flumetsulam; (xxxi) Propyzamide; (xxxii) Pyridate; (xxxiii)Trifluralin; (xxxiv) Pethoxamid (xxxv) Pendimethalin (xxxvi) Clomazone + Dimethachlor and (xxxvii) Clomazone + Metazachlor.
2. Use of D- Napropamide for the selective control of a dicotyledonous weed at a locus.
3. Use as claimed in claim 2 wherein the D-Napropamide is applied in an amount such that it is effective in controlling said dicotyledonous weed yet less active against monocotyledonous plant species at the locus.
4. Use as claimed in claim 2, wherein the locus is the vicinity of a desired crop.
5. Use as claimed in claim 4, wherein said crop is selected from winter oilseed rape, strawberries, blackcurrants, gooseberries, raspberries, field trees, shrubs, broccoli, cabbage, calabrese, cauliflower, kale and Brussel’s sprouts.
6. Use as claimed in any one of claims 2 to 5, wherein D-Napropamide is applied to said locus before or after emergence of the dicotyledonous weed.
7. Use as claimed in any one of claims 2 to 6, wherein the dicotyledonous weed is selected from the group comprising chickweed, speedwell, poppy, field bindweed, hairy fleabane, nettleleaf goosefoot, common groundsel, horseweed, common lambsqaurters, little mallow, burning nettle, sowthistles, carpetweed, fat hen, blackberry nightshade, small flowered mallow, nettles, deadnettle, knotweed, common sowthistle and amaranthus.
8. Use as claimed in any one of claims 2 to 7, wherein the dicotyledonous weed is selected from Cirsium arvense, Taraxacum officinale, Ranunculus repens, Senecio vulgaris, Papaver rohoeas, Veronica persica, Matricaria sp. Fallopia Convolvulus, Veronica arvensis, Veronica hederofolia, Stellaria media and Polygonum convolvulus.
9. Use as claimed in any one of claims 2 to 8, wherein the dicotyledonous weed is chickweed (Stellaria media).
10. Use according to any one of claims 2 to 9 wherein the D-Napropamide is applied in an amount such that it is effective in controlling said dicotyledonous weed yet substantially inactive against monocotyledonous plant species.
11. Use according to claim 10 wherein the D-Napropamide is applied to said locus at an application rate of 0.5 to 3.0 kg active ingredient/hectare.
12. A method of selectively controlling dicotyledonous weed at a locus, which method comprises treating said locus with a herbicidally effective amount of D- Napropamide, wherein the D-Napropamide is applied in an amount such that it is effective in controlling said dicotyledonous weed yet is less active against monocotyledonous plant species.
13. A method according to claim 12 wherein the D-Napropamide is applied in an amount such that it is effective in controlling said dicotyledonous weed yet substantially inactive against monocotyledonous plant species.
14. A method according to claim 12 or claim 13 wherein the D-Napropamide is applied to said locus at an application rate of 0.5 to 3.0 kg active ingredient/hectare.
15. The method as claimed in claim 12, wherein the method comprises administering said effective amount of D-Napropamide to the soil in which a desired crop selected from winter oilseed rape, strawberries, blackcurrants, gooseberries, raspberries, field trees, shrubs, broccoli, cabbage, calabrese, cauliflower, kale and Brussel’s sprouts is to be planted.
16. The method as claimed in claim 15, wherein the administration is done by application either before seeding, during seeding, or, after seeding and before the crop emerges.
17. The method as claimed in claim 15 or claim 16, wherein D-Napropamide is administered prior to the emergence of any weed.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US13/839,979 | 2013-03-15 | ||
US13/839,979 US9307765B2 (en) | 2013-03-15 | 2013-03-15 | Selective weed control using D-napropamide |
Publications (2)
Publication Number | Publication Date |
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NZ622445A NZ622445A (en) | 2015-05-29 |
NZ622445B true NZ622445B (en) | 2015-09-01 |
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