Pesticidal micronutrient compositions containing zinc oxide
AssigneeISK Biosciences Corporation
InventorsRichard Wayne Fraley, Paul Rogers
Life of this patent
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Abstract
Chlorothalonil compositions which are useful in formulating aqueous pesticidal sprays in which zinc oxide is present as a micronutrient; the compositions are particularly useful for application to potatoes.
Claims19
An aqueous pesticidal-micronutrient composition which is readily dilutable in water to provide an effective amount of pesticide-zinc nutrient for spray application to crops which, prior to dilution, comprises, by weight of the total composition:
- (a) about 10 to 60% chlorothalonil having an average particle size of approximately 1 to 10 microns;
- (b) about 1.0 to 10% of at least one nonionic surfactant;
- (c) about 0.02 to 1.0% of a heteropolysaccharide gum;
- (d) about 1.0 to 10% zinc oxide having an average particle size of 1 to 10 microns;
- and
- the balance being water.
A pesticidal-zinc micronutrient composition in the form of a wettable powder which comprises, by weight:
- (a) about 50 to 80% chlorothalonil having a 2.0 to 4.0 microns average particle size;
- (b) about 7.0 to 15.0% zinc oxide of an average particle size of 1.0 to 4.0 microns;
- (c) about 1.0 to 6.0% of a dispersing agent;
- (d) about 0.5 to 2.0% of a wetting agent;
- (e) about 0.6 to 40.0% of a diluent;
- (f) about 0.1 to 1.0% of a grinding aid;
- and
- (g) about 0.1 to 5.0% of a chelating agent.
A pesticidal-zinc wettable powder composition in the form of a spray dried dispersible granule, comprising, by weight percent of total composition:
- (a) about 50 to 80% chlorothalonil having a 2 to 4 micron average particle size;
- (b) about 6.5 to 15% zinc oxide having a 1 to 4 micron average particle size;
- and
- (c) about 2.0 to 20% of a dispersing agent.
A pesticidal composition for application to plant foliage which consists essentially of chlorothalonil and zinc oxide, said chlorothalonil being present in the composition in an amount that is pesticidally effective when the composition is formulated into an aqueous spray and applied to the plant foliage and said zinc oxide being present in an amount which is effective as a micronutrient when the composition is formulated into an aqueous spray and applied to the plant foliage with said chlorothalonil.
An aqueous spray composition for application to plant foliage which consists essentially of chlorothalonil and zinc oxide, said aqueous spray being formulated from an aqueous concentrate, a wettable powder, or a dispersible granule which consists essentially of chlorothalonil and zinc oxide, said chlorothalonil being present in the composition in an amount that is pesticidally effective when the composition is applied to the plant foliage and said zinc oxide having a particle size less than 10 microns and being present in an amount which is effective as a micronutrient when the composition is applied to the plant foliage with said chlorothalonil.
Dependencies are inferred from the claim text.