Storage stable azadirachtin formulation
AssigneeW. R. Grace & Co.-Conn.
InventorsCharles G. Carter, Clifford J. Hull, Jr., Narender P. Luthra, James F. Walter
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Abstract
Storage stable pesticide compositions comprising neem seed extracts which contain azadirachtin as the active pesticidal ingredient wherein the compositions are characterized by their non-degrading solvent systems. In a first embodiment, the pesticide compositions contain solvent systems characterized as having greater than 50% by volume aprotic solvents and less than 15% by volume water. In a second embodiment, the pesticide compositions contain solvent systems characterized as having greater than 50% by volume alcohol and less than 5% by volume water.
Claims19
A storage-stable pesticide composition comprising a neem seed extract solution containing azadirachtin wherein the solution is characterized as having at least 50% by volume aprotic solvent and less than 15% by volume water said solution being non-degrading to azadirachtin.
A storage-stable pesticide composition comprising a neem seed extract solution containing azadirachtin wherein the solution is characterized as having at least 50% by volume alcohol solvent and less than 5% by volume water said solution being non-degrading to azadirachtin.
A process for the preparation of a storage-stable pesticide composition comprising the steps of:
- a. extracting neem oil from coarsely ground neem seeds with a non-polar azadirachtin-insoluble aprotic solvent,
- b. extracting azadirachtin from the defatted neem seeds with a polar aprotic solvent, and
- c. adjusting the azadirachtin extract from (b) by diluting with additional aprotic solvents or further extracting with a water-immiscible aprotic solvent to obtain a storage-stable pesticide composition characterized as having greater than 50% by volume aprotic solvent and less than 15% by volume water.
A process for the preparation of a storage-stable pesticide composition comprising the steps of:
- a. extracting neem oil from coarsely ground neem seeds with a non-polar azadirachtin
- insoluble aprotic solvent,
- b. extracting azadirachtin from the defatted neem seeds with a alcohol solvent, and
- c. adjusting the azadirachtin extract from (b) by either diluting or further extracting with a water-immiscible aprotic solvent to obtain a storage-stable pesticide composition characterized as having greater than 50% by volume alcohol solvent and less than 5% by volume water.
A process for the preparation of a storage-stable pesticide composition comprising the steps of:
- a. extracting azadirachtin and neem oil from coarsely ground neem seeds with a polar aprotic solvent, and
- b. adjusting the azadirachtin extract from (a) by either diluting or further extracting with a water-immiscible aprotic solvent to obtain a storage-stable pesticide composition characterized as having greater than 50% by volume aprotic solvent and less than 15% by volume water.
A process for the preparation of a storage-stable pesticide composition comprising the steps of:
- a. extracting azadirachtin and neem oil from coarsely ground neem seeds with an alcohol solvent, and
- b. adjusting the azadirachtin extract from (a) by either diluting or further extracting with a water-immiscible aprotic solvent to obtain a storage-stable pesticide composition characterized as having greater than 50% by volume alcohol solvent and less than 5% by volume water.
Dependencies are inferred from the claim text.