SEDL / STP / STP1078-EB / STP25367S

Starch-Encapsulated Herbicides: Approach to Reduce Groundwater Contamination

Wing, RE
research chemistsresearch agronomist, Northern Regional Research Center, Agricultural Research Service, U.S. Department of AgriculturePurdue University, PeoriaWest Lafayette,ILIN

Doane, WM
research chemistsresearch agronomist, Northern Regional Research Center, Agricultural Research Service, U.S. Department of AgriculturePurdue University, PeoriaWest Lafayette,ILIN

Schreiber, MM
research chemistsresearch agronomist, Northern Regional Research Center, Agricultural Research Service, U.S. Department of AgriculturePurdue University, PeoriaWest Lafayette,ILIN

Pages: 9    Published: Jan 1990

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Source: STP1078-EB

Abstract

Non-chemically modified cornstarch effectively encapsulates herbicides. Aqueous gelatinization of starch at high temperature followed by active agent addition, drying and grinding yields encapsulated products that release active agents slowly. The rate of release can be controlled by varying the starch type and particle size. Preliminary data from sand and soil columns with encapsulated herbicides show that these products offer potential in reducing groundwater contamination.

Keywords:
starch, encapsulation, herbicides, slow release, groundwater

Paper ID: STP25367S
Committee/Subcommittee: E35.22
DOI: 10.1520/STP25367S
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