MODULATION OF RELEASE RATE FROM MICROENCAPSULATED PESTICIDES

• Main Authors: Yuan, Liwei, Friedman, Todd Charles, Zhang, Junhua, Hemminghaus, John W, Deng, Wenjin
• Format: Patent
• Language: English
• Published: 06.08.2020
• Subjects: AGRICULTURE; ANIMAL HUSBANDRY; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES, AS HERBICIDES; FISHING; FORESTRY; HUMAN NECESSITIES; HUNTING; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS; PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTSTHEREOF; TRAPPING

Abstract Disclosed is an aqueous pesticidal concentrate composition comprising at least one particulate microencapsulated acetamide pesticide dispersed in aqueous liquid, and a method that modulates the release rate of said microencapsulated pesticide in a mixture. The microencapsulated pesticide comprises a herbicide comprising a water-immiscible core composed of a polyurea shell wall containing the core material, wherein the acetamide herbicide concentration is at least 10 wt.%. The polyurea shell wall is formed by polymerization of a polyisocyanate and a polyamine, and the molar ratio of amine in the polyamine to isocyanate in the polyisocyanate is at least 1.01:1. The herbicidal concentrate comprises a polyvalent metal cation release modulating agent with a molecular weight no greaterthan 1000 g/mol. The molar ratio of polyvalent metal cation to amine in the polyamine component is 0.05:1 to 10:1 and the composition may comprise an acidic co-herbicide. The pesticidal composition is capable of enhancing crop safety. WO 2016/112116 PCT/US2016/012354 Soybean Injury from POST Application 80 4 - - - --- s o6 --- 0 1 6 7 0~ t600 312:60 - 0u2520 4 0 4 - - - - - - - - - - - - - - - - - - - Formulations