USH1400H - Fungicide - Google Patents
Fungicide Download PDFInfo
- Publication number
- USH1400H USH1400H US07/928,551 US92855192A USH1400H US H1400 H USH1400 H US H1400H US 92855192 A US92855192 A US 92855192A US H1400 H USH1400 H US H1400H
- Authority
- US
- United States
- Prior art keywords
- alto
- bravo
- leafspot
- chlorothalonil
- cyproconazole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- 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
- 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
- A01N37/34—Nitriles
Definitions
- the present invention relates to fungicides.
- the present invention provides a method for controlling fungal diseases in peanut comprising applying to the peanut plants or their locus in admixture or separately a fungicidally effective aggregate amount of (a) a triazole, 14- ⁇ -demethylation inhibitor, fungicide and
- the triazoles may be in free form or in fungicidally active salt forms. Such salt forms exhibit the same order of activity as the free forms.
- triazole fungicides suitable as active ingredient (a) include cyproconazole, hexaconazole, propiconazole, tebuconazole, etaconazole, penconazole, diclobutrazole, flusilazole, diniconazole, triadimefon, triadimenol, bitertanol, flutriafol and myclobutanil, whereby cyproconazole is particularly preferred.
- Cyproconazole which may be named ⁇ -chlorophenyl- ⁇ -(1-cyclopropylethyl)-1H-1,2,4-triazole-1-ethanol is a known fungicide effective in the combating of fungi in crops such as cereals including rice, especially in wheat and barley; it has excellent activity against rusts (such as Puccinia spp.), good activity against powdery mildews (such as Erysiphe), and interesting suppressive activities against Septoria, Pyrenophora, Rhynchosporium and Pseudocercosporella.
- rusts such as Puccinia spp.
- powdery mildews such as Erysiphe
- Cyproconazole is usually employed in free base form.
- the compound of the formula I which may be named 2,4,5,6-tetrachlor-1,3-benzene dicarbonitrile has the common name chlorothalonil and is a known fungicide effective against a broad range of plant pathogens on many agricultural and vegetable crops, turf and ornamentals.
- Chlorothalonil its production and use are described in U.S. Pat. Nos. 3,290,353; 3,331,735 and 3,948,636.
- an active ingredient a) with active ingredient b) is surprisingly effective in combatting soilborne or folial fungal disease of peanut such as leafspot (Cercosporidium personatum, Rhizoctonia solani, Cercospora arachidicola), Puccinia achidis and southern stem rot (Sclerotium personatum).
- This combined treatment is particularly effective in the control of late leafspot (Cercosporidium personatum) of peanut.
- Co-application can be achieved using tank mixes of preformulated individual active ingredients, simultaneous or sequential application of such formulations or application of preformulated fixed pre-mix combination of the individual active ingredients.
- Co-application according to the present invention to the "locus" of the plant includes application to the seeds, the plant itself or parts of the plant, or the soil.
- the combined treatment is preferably by foliar spray.
- suitable weight ratios of triazole to chlorothalonil typically lie in the range of from 1:75 to 1:1 with particularly marked synergism at ratios of 1:9 to 1:4.
- Combined treatment with a triazole and chlorothalonil is also effective in treating diseases caused by plants.
- the active ingredients may be formulated either separately or in the form of a pre-mix in conventional manner e.g. as emulsifiable concentrates, wettable powders, dispersible granules and the like e.g. by mixing with appropriate adjuvants such as diluents and optionally other formulating ingredients such as surfactants.
- diluent as used herein means any liquid or solid agriculturally acceptable material--including carriers--which may be added to the active constituents to bring them in an application or commercial form, respectively, to a usable or desirable strength of activity. It can for example be talc, kaolin, diatomaceous earth, mineral oil, or water.
- Particularly formulations to be applied in spraying forms such as water dispersible concentrates or wettable powders may contain surfactants such as wetting and dispersing agents, e.g. the condensation product of formaldehyde with naphthalene sulphonate, an alkylarylsulphonate, a lignin sulphonate, a fatty alkyl sulphate, an ethoxylated alkylphenol and an ethoxylated fatty alcohol.
- surfactants such as wetting and dispersing agents, e.g. the condensation product of formaldehyde with naphthalene sulphonate, an alkylarylsulphonate, a lignin sulphonate, a fatty alkyl sulphate, an ethoxylated alkylphenol and an ethoxylated fatty alcohol.
- the formulations include from 0.01 to 90% by weight of active agent, from 0 to 20% agriculturally acceptable surfactant and 10 to 99.99% of diluent, the active agent consisting of the compounds of formula I and II and optionally other active agents.
- compositions of the invention may comprise further additives with special purposes such as antifoaming agents.
- further fungicides with similar or complementary fungicidal activity e.g. tridemorph, fenpropimorph, fenpropidin, pyrazolphos, prochloraz, macozeb, sulphur and carbendazim, or other beneficially-acting materials, such as insecticides may be present in the formulation.
- compositions in general contain between about 2 and 80% preferably between about 5 and 70% by weight of active agent.
- Application forms of formulation may for example contain from 0.01 to 45% by weight.
- the invention is illustrated by the following example.
- Peanuts (Arachis hypogaea "Florunner") were planted in a field of Tifton loamy sand (pH 5.8) at the Coastal Plain Experiment Station Gibbs Farm, Tifton, Ga. on 21 May and in a field of Greenville sandy clay (pH 5.8) at the Southwest Georgia Branch Station, Plains, Ga. on 23 May.
- Plots consisted of one bed (2 rows, 6 ft ⁇ 25 ft), and were separated laterally by two nonsprayed border rows and longitudinally by 8 ft fallow alleys. Experimental design was a randomized complete block, with four replications.
- Treatments at both locations consisted of all possible combinations of six rates of cyproconazole applied as Alto® 100SL (0, 0.11, 0.21, 0.43, 0.64 and 0.85 pt/A) and four rates (0, 0.25, 0.50, and 0.75 pt/A) of chlorothalonil applied as Bravo®720 6F (ISK Corp.). Combinations of the two materials were applied as tank mixes. Seven applications were made using a 14 day schedule, with initial sprays on 20 June at Tifton and 18 June at Plains. Fungicides were applied using a pull-cart mounted spray boom. The boom was equipped with three D2-13 hollow cone spray nozzles per row. Fungicides were diluted in 12.5 gal/A of water and applied at 52 PSI.
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- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
A method of controlling fungi in peanuts employing a triazole fungicide and chlorothalonil.
Description
The present invention relates to fungicides. In particular the present invention provides a method for controlling fungal diseases in peanut comprising applying to the peanut plants or their locus in admixture or separately a fungicidally effective aggregate amount of (a) a triazole, 14-α-demethylation inhibitor, fungicide and
the compound of formula I ##STR1##
The triazoles may be in free form or in fungicidally active salt forms. Such salt forms exhibit the same order of activity as the free forms.
Examples of triazole fungicides suitable as active ingredient (a) include cyproconazole, hexaconazole, propiconazole, tebuconazole, etaconazole, penconazole, diclobutrazole, flusilazole, diniconazole, triadimefon, triadimenol, bitertanol, flutriafol and myclobutanil, whereby cyproconazole is particularly preferred.
Cyproconazole which may be named α-chlorophenyl-α-(1-cyclopropylethyl)-1H-1,2,4-triazole-1-ethanol is a known fungicide effective in the combating of fungi in crops such as cereals including rice, especially in wheat and barley; it has excellent activity against rusts (such as Puccinia spp.), good activity against powdery mildews (such as Erysiphe), and interesting suppressive activities against Septoria, Pyrenophora, Rhynchosporium and Pseudocercosporella.
This compound, methods for its production and its use are described in U.S. Pat. No. 4,664,696.
Cyproconazole is usually employed in free base form.
The compound of the formula I, which may be named 2,4,5,6-tetrachlor-1,3-benzene dicarbonitrile has the common name chlorothalonil and is a known fungicide effective against a broad range of plant pathogens on many agricultural and vegetable crops, turf and ornamentals.
Chlorothalonil, its production and use are described in U.S. Pat. Nos. 3,290,353; 3,331,735 and 3,948,636.
It has now been found that use of an active ingredient a) with active ingredient b) is surprisingly effective in combatting soilborne or folial fungal disease of peanut such as leafspot (Cercosporidium personatum, Rhizoctonia solani, Cercospora arachidicola), Puccinia achidis and southern stem rot (Sclerotium personatum). This combined treatment is particularly effective in the control of late leafspot (Cercosporidium personatum) of peanut.
Although the efficacy of the combined treatment will depend on a number of environmental factors, tests indicate that the combined treatment is particularly effective and shows synergistic effect. This allows for reduction of the rate of chlorothalonil to less than half the recommended maximum use rate which in combination with usually recommended amounts of triazole e.g. cyproconazole results in improved disease control compared with chlorothalonil alone at the maximum recommended rate.
One advantage of this surprising efficacy is the possibility for enhancing to ability the prevent resistance development by use of multiple fungicides at reduced overall rates.
Co-application can be achieved using tank mixes of preformulated individual active ingredients, simultaneous or sequential application of such formulations or application of preformulated fixed pre-mix combination of the individual active ingredients.
Co-application according to the present invention to the "locus" of the plant includes application to the seeds, the plant itself or parts of the plant, or the soil.
For airborne fungi such as the causative agents of late leafspot the combined treatment is preferably by foliar spray.
As stated above application rates chosen will depend on various factors such as degree of attack, climatic conditions and the like. Optimum usage is readily determinable by one skilled in the art using routine testing.
In general, for example, satisfactory results are obtained when applying the triazole at recommended rates e.g. in the case of cyproconazole at rates of ca 0.01 to 0.1 lbs ai/ac and chlorthalonil at rates of e.g. 0.1 to 0.6 lbs ai/ac.
Although ratios will vary according to disease pressure, suitable weight ratios of triazole to chlorothalonil typically lie in the range of from 1:75 to 1:1 with particularly marked synergism at ratios of 1:9 to 1:4. Combined treatment with a triazole and chlorothalonil is also effective in treating diseases caused by plants.
Where an active ingredient is employed in salt form it will in general be appropriate to adapt the amount of compound employed by a factor equivalent to the molecular weight ratios of the free form and the particular salt form to obtain the desired active ingredient equivalent.
The active ingredients may be formulated either separately or in the form of a pre-mix in conventional manner e.g. as emulsifiable concentrates, wettable powders, dispersible granules and the like e.g. by mixing with appropriate adjuvants such as diluents and optionally other formulating ingredients such as surfactants.
The term diluent as used herein means any liquid or solid agriculturally acceptable material--including carriers--which may be added to the active constituents to bring them in an application or commercial form, respectively, to a usable or desirable strength of activity. It can for example be talc, kaolin, diatomaceous earth, mineral oil, or water.
Particularly formulations to be applied in spraying forms such as water dispersible concentrates or wettable powders may contain surfactants such as wetting and dispersing agents, e.g. the condensation product of formaldehyde with naphthalene sulphonate, an alkylarylsulphonate, a lignin sulphonate, a fatty alkyl sulphate, an ethoxylated alkylphenol and an ethoxylated fatty alcohol.
In general, the formulations include from 0.01 to 90% by weight of active agent, from 0 to 20% agriculturally acceptable surfactant and 10 to 99.99% of diluent, the active agent consisting of the compounds of formula I and II and optionally other active agents.
In addition to the usual diluents and surfactants, the compositions of the invention may comprise further additives with special purposes such as antifoaming agents. Moreover, further fungicides with similar or complementary fungicidal activity, e.g. tridemorph, fenpropimorph, fenpropidin, pyrazolphos, prochloraz, macozeb, sulphur and carbendazim, or other beneficially-acting materials, such as insecticides may be present in the formulation.
Concrete forms of compositions in general contain between about 2 and 80% preferably between about 5 and 70% by weight of active agent. Application forms of formulation may for example contain from 0.01 to 45% by weight.
The invention is illustrated by the following example.
______________________________________
Ingredient Weight %
______________________________________
Cyproconazole (93%)
5.00
Chlorothalonil (97%)
37.76
Attagel 2.00
Reax 45A 5.00
Pluronic P105 2.00
Emulphor CO 0.50
Ethylene glycol 5.00
Water 42.74
______________________________________
Peanuts (Arachis hypogaea "Florunner") were planted in a field of Tifton loamy sand (pH 5.8) at the Coastal Plain Experiment Station Gibbs Farm, Tifton, Ga. on 21 May and in a field of Greenville sandy clay (pH 5.8) at the Southwest Georgia Branch Station, Plains, Ga. on 23 May. Plots consisted of one bed (2 rows, 6 ft×25 ft), and were separated laterally by two nonsprayed border rows and longitudinally by 8 ft fallow alleys. Experimental design was a randomized complete block, with four replications. Treatments at both locations consisted of all possible combinations of six rates of cyproconazole applied as Alto® 100SL (0, 0.11, 0.21, 0.43, 0.64 and 0.85 pt/A) and four rates (0, 0.25, 0.50, and 0.75 pt/A) of chlorothalonil applied as Bravo®720 6F (ISK Corp.). Combinations of the two materials were applied as tank mixes. Seven applications were made using a 14 day schedule, with initial sprays on 20 June at Tifton and 18 June at Plains. Fungicides were applied using a pull-cart mounted spray boom. The boom was equipped with three D2-13 hollow cone spray nozzles per row. Fungicides were diluted in 12.5 gal/A of water and applied at 52 PSI. Final visual assessments for leaf spot were made on 26 September at Tifton and 27 September at Plains. Treatments were evaluated by visual estimates of severity (percent of leaflets with one or more leafspot lesion) and leafspot ratings (Florida 1-10 scale, were 1=no leafspot, 10=dead plants, completely defoliated by leafspot). Percent control was calculated based upon leafspot severity. Plots were inverted,and southern stem rot incidence was determined on 26 September at Tifton and 27 September at Plains. Plots were harvested mechanically on 9 October at Tifton and 4 October at Plains. Data from the two locations were analyzed independently by analysis of variance, and Fisher's protected least significant difference (LSD) values were calculated for mean separations.
Late leafspot was the predominant foliar disease observed, but early leafspot was abundant. Leafspot pressure was severe. Significant chlorothalonil×cyproconazole interactions occurred for leafspot severity, percent control and Florida scale ratings.
TABLE 1
__________________________________________________________________________
Leafspot Evaluation
Severity.sup.1
% Control.sup.2
Fla Scale.sup.3
Stem rot.sup.4
Yield 1b/A
Treatment, rate
T/5
P T P T P T P T P
__________________________________________________________________________
Nontreated Control
100
100
-- -- 9.5
9.0
25.8
22.0
1961
1765
Alto ®
100 SL 0.11 pt
98 91 2 9 6.8
5.8
12.3
8.0
4045
3955
Alto ®
100 SL 0.21 pt
71 55 19 45 4.5
3.8
8.0
7.0
4372
4054
Alto ®
100 SL 0.43 pt
20 52 80 48 2.1
3.6
10.8
3.0
4413
4487
Alto ®
100 SL 0.64 pt
20 20 80 80 2.1
2.1
5.0
5.3
4372
4397
Alto ®
100 SL 0.85 pt
21 20 79 80 2.2
2.1
4.5
1.8
4658
4470
Bravo
720 0.25 pt
100
100
0 0 8.2
7.4
13.8
13.3
3228
2787
Bravo
720 0.50 pt
96 98 4 2 5.9
6.5
25.8
14.5
2574
2869
Bravo
720 0.75 pt
32 81 68 19 4.0
5.0
17.5
11.8
3309
3326
Alto ®
100 SL 0.11 pt +
84 74 16 16 5.1
7.4
12.3
9.5
3759
3457
Bravo 720 0.25 pt
Alto ®
100 SL 0.11 pt +
60 36 40 64 4.0
2.9
13.0
10.5
3841
3588
Bravo 720 0.50 pt
Alto ®
100 SL 0.11 pt +
6 20 94 80 2.7
2.1
12.3
6.5
3881
3498
Bravo 720 0.75 pt
Alto ®
100 SL 0.21 pt +
63 45 37 55 4.1
3.3
11.5
6.3
4086
3947
Bravo 720 0.25 pt
Alto ®
100 SL 0.21 pt +
20 37 80 63 2.1
2.9
11.5
6.8
4004
4111
Bravo 720 0.50 pt
Alto ®
100 SL 0.21 pt +
16 2 84 98 1.9
1.3
13.3
8.0
3718
3783
Bravo 720 0.75 pt
Alto ®
100 SL 0.43 pt +
25 1 75 99 2.4
1.2
7.3
4.3
4413
4544
Bravo 720 0.25 pt
Alto ®
100 SL 0.43 pt +
8 22 92 78 1.6
2.3
7.5
5.5
4209
4062
Bravo 720 0.50 pt
Alto ®
100 SL 0.43 pt +
3 1 97 99 1.4
1.3
5.3
3.0
4331
4331
Bravo 720 0.75 pt
Alto ®
100 SL 0.64 pt +
8 0 92 100 1.6
1.2
6.0
4.0
4617
4340
Bravo 720 0.25 pt
Alto ®
100 SL 0.64 pt +
5 9 95 91 1.4
1.7
7.8
1.8
4617
4707
Bravo 720 0.50 pt
Alto ®
100 SL 0.64 pt +
5 25 95 75 1.6
2.4
7.0
5.5
4372
4135
Bravo 720 0.75 pt
Alto ®
100 SL 0.85 pt +
6 10 94 90 1.5
1.7
4.3
3.5
4331
4716
Bravo 720 0.25 pt
Alto ®
100 SL 0.85 pt +
1 2 99 98 1.2
1.2
3.8
3.5
4740
4438
Bravo 720 0.50 pt
Alto ®
100 SL 0.85 pt +
4 6 96 94 1.4
1.4
3.8
3.5
4601
4535
Bravo 720 0.75 pt
LSD (P ≦ 0.05)
21 23 21 23 1.2
1.2
7.9
4.8
688
637
__________________________________________________________________________
.sup.1 Percent of leaflets with one or more leafspot lesion.
.sup.2 Percent control based on leafspot severity relative to nontreated
check.
.sup.3 1-10 scale where 1 = no spots and 10 = completely defoliated and
killed by leafspot.
.sup.4 Number of disease loci per 50 ft of linear row, where a locus = 1
or more infected plant per foot of row.
.sup.5 Location T = Tifton/ P = Plains for all categories.
Claims (2)
1. A method of controlling fungal disease in peanuts which comprises applying to the peanut plants or their locus in admixture or separately a fungicidally effective aggregate amount of (a) a triazole, 14-α-demethylation inhibitor and chlorothalonil.
2. A method according to claim 1 wherein the traizole fungicide is cyproconazole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/928,551 USH1400H (en) | 1992-08-11 | 1992-08-11 | Fungicide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US07/928,551 USH1400H (en) | 1992-08-11 | 1992-08-11 | Fungicide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| USH1400H true USH1400H (en) | 1995-01-03 |
Family
ID=25456403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US07/928,551 Abandoned USH1400H (en) | 1992-08-11 | 1992-08-11 | Fungicide |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | USH1400H (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997009880A1 (en) * | 1995-09-13 | 1997-03-20 | Basf Aktiengesellschaft | Fungicide mixtures |
| EP0951831A1 (en) * | 1998-04-20 | 1999-10-27 | American Cyanamid Company | Fungicidal co-formulation |
| WO2000045636A1 (en) * | 1999-02-08 | 2000-08-10 | Cognis Corporation | Pigmented coatings exhibiting reduced fading |
| EP1763998A1 (en) | 2005-09-16 | 2007-03-21 | Syngenta Participations AG | Fungicidal compositions |
| WO2007048534A1 (en) * | 2005-10-26 | 2007-05-03 | Syngenta Participations Ag | Fungicidal compositions |
| WO2007062802A2 (en) * | 2005-11-29 | 2007-06-07 | Syngenta Participations Ag | Synergistic fungicidal compositions comprising chlorothalonil and ipconazol |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4664696A (en) * | 1983-03-04 | 1987-05-12 | Sandoz Ltd. | α-phenyl- or benzyl-α-cyclopropylalkylene-1H-imidazole- and 1,2,4-triazole-1-ethanols and use against fungus |
-
1992
- 1992-08-11 US US07/928,551 patent/USH1400H/en not_active Abandoned
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4664696A (en) * | 1983-03-04 | 1987-05-12 | Sandoz Ltd. | α-phenyl- or benzyl-α-cyclopropylalkylene-1H-imidazole- and 1,2,4-triazole-1-ethanols and use against fungus |
Non-Patent Citations (1)
| Title |
|---|
| The Merck Index, 10 ed., (1983) p. 305. * |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997009880A1 (en) * | 1995-09-13 | 1997-03-20 | Basf Aktiengesellschaft | Fungicide mixtures |
| US5981561A (en) * | 1995-09-13 | 1999-11-09 | Basf Aktiengesellschaft | Fungicide mixtures |
| EP0951831A1 (en) * | 1998-04-20 | 1999-10-27 | American Cyanamid Company | Fungicidal co-formulation |
| WO2000045636A1 (en) * | 1999-02-08 | 2000-08-10 | Cognis Corporation | Pigmented coatings exhibiting reduced fading |
| US6409809B1 (en) | 1999-02-08 | 2002-06-25 | Cognis Corporation | Pigmented coatings exhibiting reduced fading |
| EP1763998A1 (en) | 2005-09-16 | 2007-03-21 | Syngenta Participations AG | Fungicidal compositions |
| WO2007031308A2 (en) * | 2005-09-16 | 2007-03-22 | Syngenta Participations Ag | Fungicidal compositions |
| WO2007031308A3 (en) * | 2005-09-16 | 2008-05-08 | Syngenta Participations Ag | Fungicidal compositions |
| WO2007048534A1 (en) * | 2005-10-26 | 2007-05-03 | Syngenta Participations Ag | Fungicidal compositions |
| WO2007062802A2 (en) * | 2005-11-29 | 2007-06-07 | Syngenta Participations Ag | Synergistic fungicidal compositions comprising chlorothalonil and ipconazol |
| WO2007062802A3 (en) * | 2005-11-29 | 2007-09-07 | Syngenta Participations Ag | Synergistic fungicidal compositions comprising chlorothalonil and ipconazol |
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|---|---|---|---|
| STCF | Information on status: patent grant |
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