Raski, Dewey J. Department of Nematology, University of California, Davis, California.
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A type of chemical used to kill plant-parasitic nematodes. Nematicides may be classed as soil fumigants or soil amendments, space fumigants, surface sprays, or dips. Soil treatments are commonly used because most plant-pathogenic species spend part or all of their life cycle in the soil, in or about the roots of plants. Nematicides may be liquids, gases, or solids, but on a field scale, liquids are most practical. These materials possess a high vapor pressure and volatilize quickly to act as soil fumigants. Carbon disulfide, CS2, and chloropicrin were among the first to be developed for this purpose. Their use is fairly restricted because of high cost; besides, CS2 is highly flammable and explosive and chloropicrin requires a cover or water seal.
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