Mechanisms of Contamination of Alfalfa with Heptachlor and Heptachlor Epoxide1

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Abstract:

Alfalfa grown in soil treated with I and 4 pounds per acre of heptachlor and heptachlor epoxide in glazed earthenware crocks showed evidence of very limited translocation of heptachlor epoxide; it appears that heptachlor itself is not translocated. Contamination of foliage by volatilization of heptachlor does not appear to be a factor of any importance in connection with buildup of residues on the aerial parts of the plant. In a field experiment the levels of both heptachlor and heptachlor epoxide detected in harvested alfalfa indicate some major means of contamination other than translocation. Weather during harvesting and method of harvesting appear to be important factors in the contamination of aerial plant parts with insecticide on the aerial parts of the plant. In a field experiment the levels of both heptachlor and heptachlor epoxide detected in harvested alfalfa indicate some major means of contamination other than translocation. Weather during harvesting and method of harvesting appear to be important factors in the contamination of aerial plant parts with insecticide.

Document Type: Research Article

Publication date: April 1, 1966

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