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Monocrotophpos and dicrotophos residues in birds as a result of misuse of organophosphates in Matagorda County, Texas

Journal of the Association of Official Analytical Chemists

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Abstract

About 1100 birds of 12 species 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 weeks. The practice of illegally treating rice seed with either of these 2 organophosphates appears to be infrequent but widespread at present.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Monocrotophpos and dicrotophos residues in birds as a result of misuse of organophosphates in Matagorda County, Texas
Series title:
Journal of the Association of Official Analytical Chemists
Volume
67
Issue:
4
Year Published:
1984
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
827-828
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
827
Last page:
828
Number of Pages:
2