Plant protecting and regulating compositions – Plant growth regulating compositions – Plural active ingredients
Reexamination Certificate
2001-03-12
2003-06-24
Clardy, S. Mark (Department: 1616)
Plant protecting and regulating compositions
Plant growth regulating compositions
Plural active ingredients
C504S127000, C504S128000, C504S336000
Reexamination Certificate
active
06583087
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to an aqueous pesticidal composition.
BACKGROUND ARTS
Currently, various pesticides are utilized in agriculture. For saving labor, two or more pesticides are often applied simultaneously. Pesticidal formulations containing two or more pesticidal ingredient are usually utilized for the above-mentioned application. However, it is generally difficult to prepare a pesticidal formulation comprising a water-soluble pesticidal ingredient and a water-insoluble pesticidal ingredient.
For examples, various herbicides are being utilized for agricultural fields or non-agricultural fields, but since there are various weeds which are target of control and a sole herbicidal active compound is not enough for controlling the various weeds, a combination of plural active compounds is often utilized. Especially, herbicides soluble easily in water represented by glyfosate salts and glufosinate salts are excellent as total herbicide. However, they generally need time to exhibit their herbicidal effect. Therefore, herbicidal compositions combined them with herbicides inhibiting protoporphyrinogenoxidase for adding rapid efficacy are recently suggested in U.S. Pat. No. 5,698,492.
On the other hand, liquid formulations, especially aqueous formulations, are desired by users rather than solid formulations in view of convenience of weighing the formulation when applying. Therefore, the aqueous formulations are widely utilized in a system (bulk delivery system), connected a tank for pesticide formulation with another water tank for dilution by a fastened pipe, to prepare pesticidal application liquid in large fields and so on. Further, the above-mentioned herbicides soluble easily in water are often used as aqueous formulations because of their high water-solubility.
However, many of the above-mentioned herbicides inhibiting protoporphyrinogenoxidase generally tend to decompose in aqueous formulations, and aqueous formulations comprising the herbicide soluble easily in water and the herbicide inhibiting protoporphyrinogenoxidase have insufficient stability (emulsifiable stability, suspensible stability, etc.). As a result, aqueous formulations which hardly decompose and have high stability are desired.
SUMMARY OF THE INVENTION
The present invention provides a stable pesticidal formulation comprising a water-soluble pesticidal ingredient and a water-insoluble pesticidal ingredient, especially a water-soluble herbicidal ingredient and a herbicidal ingredient inhibiting protoporphyrinogenoxidase.
More specifically, the present invention relates to an aqueous pesticidal composition which comprises a water-soluble pesticidal ingredient, water-insoluble pesticidal ingredient, nonionic or anionic surfactant, anionic water-soluble polymer and hydrophobic organic solvent. In the present composition, the decomposition of the pesticidal active ingredients is suppressed for a long time and as a result, the present composition affords high stability.
DISCLOSURE OF THE INVENTION
Namely, the present invention relates to an aqueous composition which comprises (a) water-soluble pesticidal ingredient such as herbicidal active ingredient, (b) water-insoluble pesticidal ingredient such as herbicidal ingredient inhibiting protoporphyrinogenoxidase, (c) at least one selected from nonionic surfactants and anionic surfactants, (d) anionic water-soluble polymer, (e) hydrophobic organic solvent and (f) water.
In the present invention, examples of the pesticidal ingredients include herbicidal compounds, insecticidal compounds, acaricidal compounds, nematocidal compounds, fungicidal compounds, plant growth regulating compounds and insect growth regulating compounds. The term “water-soluble” means 100 g/L or more solubility in water at 20° C. and the term “water-insoluble” means 10 g/L or less solubility in water at 20° C.
Typical water-soluble pesticidal ingredient is an amino acid-type herbicidal active ingredient such as agriculturally acceptable salts of N-(phosphonomethyl)glycine (common name: glyphosate), DL-homoalanin-4-yl(methyl)phosphinic acid (common name: glufosinate) and 4-[hydroxy(methyl)phosphinoyl]-L-homoalanyl-L-alanyl-L-alanine (common name: bialafos). The other examples of the water-soluble herbicidal ingredients include agriculturally acceptable salts of 3-isopropyl-1H-2,1,3-benzothiadiazin-4(3H)-one 2,2-dioxide (common name: bentazone), 3,6-dichloropicolinic acid (common name: clopyrarid), (2,4-dichlorophenoxy)acetic acid (common name: 2,4-D), 3,6-dichloro-2-methoxybenzoic acid (common name: dicamba), 2-(2,4-dichlorophenoxy) propionic acid (common name: dichlorprop), (4-chloro-2-methylphenoxy) acetic acid (common name: MCPA), 4-(4-chloro-O-tolyloxy)butyric acid (common name: MCPB), 2-(4-chloro-2-methylphenoxy)propionic acid (common name: mecoprop) and 4-amino-3,5,6-trichloropicolinic acid (common name: picloram). Examples of the salts include sodium salt, ammonium salt, isopropylammonium salt, trimesium salt and potassium salt.
The water-soluble pesticidal ingredient can be utilized solely or combined two or more, and usually contained in an amount of 15 to 80% by weight, preferably 25 to 65% by weight, more preferably 30 to 60% by weight in the present composition.
Typical water-insoluble pesticidal ingredient is herbicidal ingredient inhibiting protoporphyrinogenoxidase (hereinafter, referred to as PPO active ingredient) that is herbicidal active ingredient which exhibits herbicidal action by inhibiting protoporphyrinogenoxidase enzyme. Examples of the PPO active ingredient include imide type compounds having an N-phenyltetrahydrophthalimide structure, pyridazinone type compounds having a 2-phenylpyridazin-3-one structure, uracil type compounds having a 1-phenylpyrimidin-2,6-dione structure, diphenyl ether type compounds and so on. More concretely, examples of the imide type compound include pentyl [2-chloro-5-(cyclohex-1-en-1,2-dicarboximido)-4-fluorophenoxy]acetate (common name: flumiclorac-pentyl), N-[(7-fluoro-3,4-dihydro-3-oxo-4-(2-propynyl)-2H-1,4-benzoxazin-6-yl)]cyclohex-1-en-1,2-dicarboximide (common name: flumioxazin) and ethyl 2-chloro-3-[2-chloro-5-(1,3-dioxo-4,5,6,7-tetrahydroisoindolin-2-yl) phenyl]acrylate (common name: cinidon-ethyl). Examples of the pyridazinone type compound include ethyl 2-chloro-4-fluoro-5-(5-methyl-6-oxo-4-trifluoromethyl-1,6-dihydropyridazin-1-yl)phenoxyacetate, methyl [2-chloro-4-fluoro-5-[(tetrahydro-3-oxo-1H, 3H-[1,3,4] thiadiazolo[3,4-a]pyridazin-1-ylidene)amino]phenylthio] acetate (common name: fluthiacet-methyl). Examples of the uracil type compound include 1-allyloxycarbonyl-1-methylethyl 2-chloro-5-(3-methyl-2,6-dioxo-4-trifluoromethyl-3,6-dihydro-2H-pyrimidin-1-yl)benzoate (common name: butafenacyl). Examples of the diphenyl ether type compound include ethyl O-[5-(2-chloro-&agr;,&agr;,&agr;-trifluoro-p-tolyloxy)-2-nitrobenzoyl]-DL-lactate (lactofen) and methyl 5-(2,4-dichlorophenoxy)-2-nitrobenzoate (common name: bifenox) ethyl &agr;,2-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]-4-fluorobenzenepropanoate (carfentrazone-ethyl). Examples of the other PPO active ingredient include N-[2,4-dichloro-5-[4-(difluoromethyl)-4,5-dihydro-3-methyl-5-oxo-1H-1,2,4-triazol-1-yl]phenyl]methanesulfonamide (common name: sulfentrazone, ethyl 2-chloro-5-(4-chloro-5-difluoromethoxy-1-methylpyrazol-3-yl) -4-fluorophenoxyacetate (common name: pyraflufen-ethyl) and 2-[2,4-dichloro-5-(2-propynyloxy)phenyl]-5,6,7,8-tetrahydro-1,2,4-triazolo[4,5-a]pyridin-3(2H)-one (common name: azafenidin).
The water-insoluble pesticidal ingredient can be utilized solely or combined two or more, and usually contained in an amount of 0.1 to 30% by weight, preferably 0.3 to 20% by weight in the present composition.
In the present composition, the surfactant is at least one selected from nonionic surfactants and anionic surfactants. Typical examples of the nonionic surfactant includ
Birch & Stewart Kolasch & Birch, LLP
Clardy S. Mark
Sumitomo Chemical Company Limited
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