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Organophosphate residues in grasshoppers from sprayed rangelands

Chemistry in Ecology

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Abstract

Grasshoppers (Orthoptera) were collected in pastures that had been sprayed with malathion and acephate to estimate the secondary exposure of insectivorous birds to these pesticides. Residues of malathion were below 3 ppm at 30 'and 54 hours after spraying and no malaoxon was detected. In contrast, acephate was found at 8 and 9 ppm 4 hours after spray; 3-5 ppm of the toxic metabolite methamidophos were also detected at that time. By 53 hours postspray, acephate levels declined to 2 ppm and methamidophos to less than 1 ppm. These results suggest that although malathion may not be a hazard to insectivorous species. acephate may be hazardous through metabolic transformation to methamidophos.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Organophosphate residues in grasshoppers from sprayed rangelands
Series title:
Chemistry in Ecology
Volume
2
Issue:
1
Year Published:
1984
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
39-45
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Chemistry in Ecology
First page:
39
Last page:
45
Number of Pages:
7