STP1112: Starch Matrices for Slow Release of Pesticides

    Shasha, BS
    research chemist and research entomologist, Northern Regional Research Center, Agricultural Research Service, Peoria, IL

    McGuire, MR
    research chemist and research entomologist, Northern Regional Research Center, Agricultural Research Service, Peoria, IL

    Pages: 8    Published: Jan 1992


    Abstract

    Physical entrapment of both biological and chemical pesticides was acheived by encapsulation of active ingredients within starch matrices. Starch is first gelatinized either physically using heat, or chemically using alkali or urea, then pesticide is added followed by the crosslinking of starch. The final product is granular, ready to be used with conventional equipment. Electron microscope photographs reveal the presence of a honeycomb matrix containing the pesticide. Sprayable formulations based on entrapment within starch were also acheived. The sprayable material has a low and stable viscosity and can be used with conventional farm equipment. Upon application it dries to a thin film that does not dissolve in the presence of water.

    Keywords:

    starch, encapsulation, biological pesticides


    Paper ID: STP16869S

    Committee/Subcommittee: E35.22

    DOI: 10.1520/STP16869S


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