Cholinesterase inhibition of birds inhabiting wheat fields treated with methyl parathion and toxaphene

Niethammer, K.R.; Baskett, T.S.

Abstract:

Red-winged blackbirds (Agelaius phoeniceus) and dickcissels (Spiza americana) inhabiting wheat fields treated with 0.67 kg AI/ha methyl parathion and 1.35 kg AI/ha toxaphene showed brain cholinesterase (ChE) inhibition compared with birds inhabiting untreated fields. Maximum inhibition occurred about five days after insecticide application. ChE activities again approached normal 10 days after treatment. ChE inhibition for dickcissels and red-winged blackbirds differed significantly (p<0.05); maximum inhibition for the former species was 74%, and for the latter, 40%. These differences could not be explained by the diets of the two species, as they were similar.

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Article

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5221833

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Niethammer, K.R.; Baskett, T.S.

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Patuxent Wildlife Research Center

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475

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English

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Archives of Environmental Contamination and Toxicology

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471-475

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Cholinesterase inhibition of birds inhabiting wheat fields treated with methyl parathion and toxaphene; 1983; Article; Journal; Archives of Environmental Contamination and Toxicology; Niethammer, K.R.; Baskett, T.S.