CA1145965A - Herbicidal compositions containing n- (phosphonomethyl)-glycine - Google Patents

Abstract

ABSTRACT
This invention relates to herbicidal compositions containing N-(phosphonomethyl)-glycine or a non-phytotoxic salt thereof, in combination with 2,4-dichlorophenxyacetic acid or ?-naphthylacetic acid or non-phytotoxic salt of these compounds.
By using the compositions according to the inven-tion the herbicidally effective amount of N-(phosphonomethyl)--glycine can considerably be reduced in comparison with the commercially available compositions, which contain N-(phos-phonomethyl)-glycine as an only active ingredient.

Description

HERBICID~L COMPOSITIONS CONTAINING N- (P~IOSP~IONOME~THYL) -GLYCINE
TECHNIC~L FIELD
The invention relates to herbicidal compositions containing N- (phos-phonomethyl)-glycine or a non-phytotoxic salt thereof, in combination with

2,4-dichlorophenoxyacetic acid or ~-naphthylacetic acid or a non-phyto-toxic salt of these ccmpounds.
BAI~XGROUND AR~
It is well known from the literature that N-(phosphonomethyl)-glycine can successfully be used for ccmbatting weeds, especially perennial, deeply rooted weeds, but is effective also as a total plant killer ~United States Patent Specification No. 3,799,758/.
2,4-Dichlorophenoxyaoetic acid and ~-naphthylacetic acid are also kncwn in the art.
It is the object of the present invention to provide combinations, in ~hLich, as a result of using further additives, the herbicidally effective amount of N-(phosphonomethyl)-glycine can considerably be reduced in comparision with the herbicidally effective amount of N-(phosphonomethyl)-glycine in omposi-tions, which contain this compound alone.
DISCLOSURE OF THE INvENrION
The present invention relates to herbicidal compositions ccmprising a co~bination of N-(phosphonomethyl)-glycine and 2,4-dichlorophenoxyacetic acid or~-naphthylacetic acid or a non-phytotoxic salt of these compounds, in an effec-tive amount.

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~5~3~5 Thus, this inven~ion provides herbicidal compositions comprising a com-bination of N-(phosphonomethyl)-glycine or a non-phytotoxic salt thereof and A) 2,4-dichlorophenoxyacetic acid or a non-phytotoxic salt thereof, in a weight ratio of between 5:1 and 1:5; or B) ~-naphthylacetic acid or a non-phytotoxic salt thereof, in a weight ratio of between 2:1 and 5:1.
The present invention is based on the recognition that the herbicidally effective amount of N-(phosphonomethyl)-glycine or a salt thereof can consider-ably be reduced by using it in combination with 2,4-dichlorophenoxyacetic acid or a non-phytotoxic salt of these compounds.
Non-phytotoxic salts of N-(phosphonomethyl)-glycine preferably include alkyl amine salts, preferably having from 1 to 4 carbon atoms.
The preferred salts of 2,4-dichloTophenoxyacetic acid also includes alkyl amine salts~ preferably having from 1 to 4 carbon atoms, e.g. isopropyl amine, dimethyl amine salts, etc., but other salts, e.g. alkali metal, alkali earth metal salts can also be used.
The herbicidal compositions containing N-(phosphonomethyl?-glycine as active ingredient are commercially available generally as emulsifiable concentra-tes containing 30 to 36% by weight of active ingredient. They are generally employed at a rate of 10 lit./ha.
The compositions according to the invention contain from 0.01 to 95% by weigh-t of the herbicidally active combination and 5 to 99.9% by weight of one or more formulation acids.
The total active ingredient concentration preferably is between 0.1 -to 85% by weight, more preferably between 1 and 40% weight.
The proportion of N-(phosphonomethyl)-glycine to 2,4-dichlorophenoxyacetic acid or ~-naphthylacetic acid can be varied within a wide range. The weight ~s~s ratio of N-(phosphonomethyl)-glycine or a salt thereof to dichlorophenoxyacetic acid or a salt thereof is between 5:1 and 1:5, and preferably between 4:1 and 1:2.
The proportion of N-(phosphonomethyl)-glycine or a salt thereof to ~-naphthylacetic acid or a salt tllereof is.between 2:1 and 5:1.

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' " ~ ' It has surprisingly keen found that of the herbicidal c~positions according to the invention a smaller amount is required to obtain the same herbicidal effect than of the commercially available co~positions, which containN-(phosphonomethyl)-glycine as a sole active ingredient. In this way N-(phos-phonomethyl)-glycine can partly be replaced by other agricultural chemicals and its effectivity can be increased.
m e formulation aids usable in the compositions according to the inven-tion are additives generally applied in the preparation of herbicides and des-cribed in detail in numerous textbooks. The formulation aids n~y for example be inert solid or liquid carriers, diluents, surfactants, e.g~ dispersing and emNlsifying agents, wetting agents, adhesives, etc.
As diluents for example various hydrocarbon derivatives, mineral oil fractions, vegetable and anim~l oils, polar solvents, water, etc. can be used.
By using these formulation aids the compositions may conveniently ke formulated as solutions, emulsi~ls and dispersions.
me compositions according to the invention may also be formulated as ooncentrates, which can be diluted in the place of application with water or anyother suitable solvent. Such concentrates include for exa~ple pastes, oily dis-persions, emulsifiable concentrates, etc.
Suitable surfactants include salts of ligninsulfonic acid, alkylaryl sulfonates, aLkyl sulfates, fatty alcohol sulfates, alkylarylpolyglycol ethers, etc.
BEST M~DE OF CARRYING OUT THE INVENTION
-m e present invention and the best modes of carrying out the invention are illustrated in detail by the following Examples which do not however serve to limit the scope of protection sought.

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Example 1 ~ .
Te~t pla~t~: Agropyron.repe~s, C~nodon dactylon and Sor~hum halepe~e (pexe~nial~ mo~ocatyledonou~ weed~
Te~t compound~:
A N-(pho~L~onomethyl)-~lycine E 2 9 4-dichlorophenoxyacetic acid d~nethyl amine ~alt F ~-naphthylacstic acid Field trial~ were carried out with the ~ollowing compo~itions.
A di~persion of 1~8 and 3~6 kg of compound A ln 500 lit~ of water is applied to one hectare~ .
In a~sther te,st a di~per~ion o~ 1,,8 kg o:E a com-pound A a~d Q. 9 kg of a compour~a E or ~ in 500 lit ~. of v~ater wa~ applied to one hectare~
Control experiment~ were carrie~ out al~o with compositions containing 0~9 kg o~ compounrl E and ~ r~speo-tively.
Evaluation wa~ made.30 days aIter treatmerltO
The result~ obtained are given in the ~ollowin~
Ta bl e lo ~able 1 Plant Active ingreAient ~kg/ha.3 A ~ ~ A~E A~
108 396 oO9 0.9 l~8~00~ 1.8+0~9 - Agropyron repen~ 65100 ~ 0 . 0 100 100 Cynodo~
d~ctylon 6095 100 0 Q ioo 100 Sorghum h~lopen~a 65 100 0 0 100 100 ~ 5 ~

O a ~o damage 100 = total killing.
From the data given above it can be ~een that the compositio~ con~aining a combination o~ compound~ A
and E, and A and ~, re~pectivel~ have the same ef~ect as the compo~ition~ containing N-(pho~phonomethyl~-g1ycine (compound A) alo~e, in an amou~t o~ 3.6 kg. In other word~ 7 when u~ing th~ combin~tion accordin~ to the inve~tion the amou~t of ~-~pho~phonomethyl)-glycine required to achieve the same herbicidal effect i~ reduced by 50 70.
xample 2 Te~t plant~: AOxopyron repens, Ciochorium intybu~, Plantago media, Cy~odon dactylon, Achille~ di~tan~, Axtemi~ia vulgaris, Sochu~ oleraceu~.
Te~t compound~: ~
A ~-(pho~phonométh~ glycine E 2,~-dichlorophenox~acetic acid dimethyl ami~e ~alt ~ield trial~ were carried ou-t ~ith the ~ollo~i~g ¢ompositio~:
~ disper~io~ of 1~08 kg. of compound A and com-- pou~d E9 re~pectiv01y;in 500 lit. of water; and a di~per-~io~ o~ a ~ombi~atio~ of 0~6 kgo of compound A and 0.2 ~g.
o~ compound E in 500 lit. of water.
45 day~ a~ter ~praying it wa~ establi~hed that the compo~ition contal~ing a combinatio~ of the compou~d~
and E had the aame herbicidal effect o~ all tsst plant~
a2 t~e c~mpositio~ contalni~g N-(pho~phonomethyl3-glycine alonsg i~e. n~ce~ary amount o~ N-rpho~phonomet~ lycl~e can be reduced to about G0 %.

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. Analogeou~ te~t~ were carried out al~o Agropyron repen~ 9 Achille~ di~tan~, ~rtemisia ~ulgaris, Cy~odon dac-tylon, Plantago media and SonGhu~ oleraceu~. If wa~ found that a di~per~ion o~ 1~8 kgo ~ N-(pho~phonomethyl)-glycine .
in 500 lit. of water re~ulted in killing of 70 ~0 o~ the w~ed~ 30 day~ a~ter trea~ment, while whe~ adding al~o 10, 20 and 40 % by weight, re~pectively of 2,4-dichloropheno~y-acetic acid to the compo~ition~, the weed killinG was about 85 to 9F %-Emul~i~iable concentrate~
~n~redient 9 Amou~t . (parts by ~eight) 1:1 mi~ture of ~-(pho~phonomethyl3--glyci~e and 2, 4-dichlorophenoxy-ace~ic acid dimethyl ami~e ~lt 10 Isooctylphenol polyglycol ether 10.
Water . 80 The mixl;ure obtai~ed by admixing the ingredient~
optionally immediately be~ore applicatio~ diluted wit~
wa~er to th~ de~ired concentratio~
~a~ . . . .
Aqu,eous di~rsion Ingredient~ Amount ~paxtg by weight) 2:1 mix~ure oP ~-~phospho~o-methyl~-glycine and ~4 di chlorophe~Q~yacetic acid di-methyl ami~e ~alt 30 ~ylene `~ 80 .
Ethyleneoxide-oil acid ~-monoethanol . amide addi~ion product lQ
Dodecylbanzena3ulfo~ic acid Ca 5 Ethyla~eoxide-cQstor oil additio~
product 5 59~5 ' The di~persion obtained by admixing the ingre-di~nt~ i~ diluted with 100 000 part~ by weight o~ water.
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Tank m ture I~gredients Amount (part~ by weight) 1:2 mixture of N-(phosphonomethyl)- --glycine and ~,4-dichloro~henoxy-acetic acid d~methyl amin~ salt 10 10 . ?,4-dichloropheno~yacetic acid dimethyl amine salt . 10 lignine~ulfonic acid Na 10 ~he m~ture.obtained by admixing the i~gredients is dilute'd with ~0 000 part~ by wei~ht o~ waterD ~he ta~k ~ mixturè oontain~ 0.1 ~ weight of acti~e ingredient~

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Claims (3)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. Herbicidal compositions comprising a combination of N-(phosphonomethyl)-glycine or a non-phytotoxic salt thereof and A) 2,4-dichlorophenoxyacetic acid or a non-phytotoxic salt thereof, in a weight ratio of between 5:1 and 1:5; or B) .alpha.-naphthylacetic acid or a non-phytotoxic salt thereof, in a weight ratio of between 2:1 and 5:1.

2. Compositions as claimed in claim 1 wherein the weight ratio of N-(phos-phonomethyl)-glycine or a salt thereof to 2,4-dichlorophenoxyacetic acid or a salt thereof is between 4:1 and 1:2.

3. Compositions as claimed in claim 1 or claim 2 containing from 0.01 to 95% by weight of said herbicidally active combination and 5 to 99.9% by weight of one or more formulation aids.