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Monocrotophos and dicrotophos residues in birds as a result of misuse of organophosphates in Matagorda county Texas USA

Journal of the Association of Official Analytical Chemists

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Abstract

About 1100 birds of 12 spp. [Red-winged blackbird (Agelaius phoeniceus), great-tailed grackle (Quiscalus mexicanus), brown-headed cowbird (Molothrus ater), mourning dove (Zenaida macrours), Eastern meadowlark (Sturnella magna), vesper sparrow (Pooecetes gramineus), common snipe (Gallinago gallinago), blue-winged teal (Anas discors), mottled duck (Anas fulvigula), common moorhen (Gallinula chloropus), redhead (Aythya americana) and ruddy turnstone (Arenaria interpres)] died from organophosphate poisoning in Matagorda County on the Texas Gulf Coast in March and May 1982. Birds died from feeding on rice seed that was illegally treated with dicrotophos or monocrotophos and placed near rice fields as bait to attract and kill birds. Brain acetylcholinesterase inhibition of affected birds averaged 87% (range 82-89%), and contents of gastrointestinal tracts contained residues of dicrotophos (5.6-14 ppm) or monocrotophos (2.1-13 ppm). Rice seed collected at mortality sites contained 210 ppm dicrotophos or 950 ppm monocrotophos. Mortality from dicrotophos poisoning continued for almost 3 wk. The practice of illegally treating rice seed with either of the 2 organophosphates appears to be infrequent but widespread at present.

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Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Monocrotophos and dicrotophos residues in birds as a result of misuse of organophosphates in Matagorda county Texas USA
Series title:
Journal of the Association of Official Analytical Chemists
Volume
67
Issue:
4
Year Published:
1984
Language:
English
Publisher:
AOAC International
Publisher location:
Gaithersburg, MD
Contributing office(s):
Upper Midwest Environmental Sciences Center
Description:
2 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
827
Last page:
828
Number of Pages:
2
Country:
United States
State:
Texas
County:
Matagorda County