Grasshoppers (Orthoptera) were collected in pastures that had been sprayed with malathion and acephate to estimate the secondary exposure of insectivorous birds to those 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. © 1984, Taylor & Francis Group, LLC. All rights reserved.
CITATION STYLE
Stromborg, K. L., Mcewen, L. C., & Lamont, T. (1984). Organophosphate Residues in Grasshoppers from Sprayed Rangelands. Chemistry and Ecology, 2(1), 39–45. https://doi.org/10.1080/02757548408070819
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