Alkali lignin based pesticide phytotoxicity reducing composition
AssigneeWestvaco Corporation
InventorsHumbert T. DelliColli, Thomas F. McPartland, Walter A. Bauer
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Abstract
A method for protecting crops from injury caused by the application of herbicides and fungicides has been discovered, the method comprising applying to the crops in combination with the pesticide a phytotoxicity reducing amount of a water-insoluble, non-sulfonated alkali lignin. A water-insoluble, non-sulfonated alkali lignin based spray tank mix additive is provided which, when mixed with the pesticide prior to application, reduces the phytotoxic effect of the pesticide.
Claims29
In a method of protecting crops from injury caused by application to the crops of one or more pesticides selected from the group consisting of herbicides and fungicides, in combination with a lignin, the improvement of forming the combination by
- (a) forming a pseudoplastic aqueous suspension concentrate of a water-insoluble alkali lignin containing minor amounts of at least one surfactant selected from the group consisting of humectants, wetting agents, dispersing agents and anti-freeze agents wherein the lignin has a mean particle size of from 0.5 to 5 microns in diameter, and
- (b) combining a phytotoxicity reducing amount of the lignin suspension concentrate with the pesticide prior to the application.
In a method of protecting crops from injury caused by application to the crops of a pesticide wherein the pesticide is a herbicide or fungicide, in combination with a lignin, the improvement of forming the combination by
- (a) combining a phytotoxicity reducing amount of a water-insoluble alkali lignin with the herbicide or fungicide in an aqueous slurry,
- (b) drying the slurry to from about 2% to about 5% moisture,
- (c) adding to the essentially dried slurry at least one surfactant selected from the group consisting of humectants, antifreeze agents, wetting agents and dispersing agents in an amount totaling from about 1% to about 10% by volume of the total formulation, and
- (d) grinding the slurry to a wettable powder with an average particle size of from 3 to 9 microns in diameter.
In a flowable pesticide formulation comprising one or more herbicides or fungicides, a water-insoluble alkali lignin, and at least one surfactant selected from the group consisting of humectants, anti-freeze agents, wetting agents and dispersing agents in an amount totaling from about 1% to about 10% by volume of the total formulation the improvement of grinding a phytotoxicity reducing amount of the lignin granules together with the herbicide or fungicide powders in the presence of at least one of the surfactants to an average particle size of from 3 to 9 microns.
Dependencies are inferred from the claim text.