Microencapsulated insecticidal pathogens
AssigneeLim Technology Laboratories, Inc.
InventorsHoward A. Bohm, Deborah R. Friend
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Abstract
A microencapsulated insecticidal pathogen for application to vegetation is disclosed. An insecticidal viral, bacterial or fungal pathogen is encapsulated in a polymeric encapsulating agent such as Eudragit L, Eudragit S, Eudragit L or S with Eudragit RL, Eudragit L or S with Eudragit RS, polyacrylates, polyacrylic acids, cyclic acrylate polymer or mixtures thereof. Also encapsulated in the polymeric encapsulating agent is a sunscreening agent such as benzophenone, para amino benzoic acid, benzil, or mixtures thereof. Also disclosed is a process for encapsulating an insecticidal pathogen. The microcapsules of the invention effectively retain sunscreening agent within the capsule and are easily prepared without using toxic materials requiring subsequent removal.
Claims13
Microencapsulated pathogen comprising:
- (i) an insecticidal pathogen;
- (ii) a polymeric encapsulating agent comprising polyacrylates, polyacrylic acids, cyclic acrylate polymer, polyacrylamides or mixtures thereof;
- (iii) a sunscreening agent selected from the group consisting essentially of benzophenone, para aminobenzoic acid, benzil or mixtures thereof.
A process for encapsulating an insecticidal pathogen comprising the steps of:
- (i) mixing (A) an encapsulating polymer comprising at least one of polyacrylates, polyacrylamides (B) a sunscreening agent selected from the group consisting essentially of benzophenone, para aminobenzoic acid, benzil or mixtures thereof, and (C) a solvent comprising at least one of polyethylene glycol, propylene glycol, a mixture of methylene and propylene glycol, tetrahydrofuran, tetrahydropyran, furan, and pyran;
- said encapsulating polymer, sunscreening agent and solvent forming a first solution;
- (ii) preparing an aqueous suspension of the insecticidal pathogen;
- (iii) preparing a second aqueous surfactant solution having a pH below 7;
- and
- (iv) mixing said first solution, said aqueous suspension, and said second aqueous surfactant solutions to form microcapsules.
Dependencies are inferred from the claim text.