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

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.
AuthorsE L Flickinger, D H White, C A Mitchell, T G Lamont
JournalJournal - Association of Official Analytical Chemists (J Assoc Off Anal Chem) 1984 Jul-Aug Vol. 67 Issue 4 Pg. 827-8 ISSN: 0004-5756 [Print] United States
PMID6469917 (Publication Type: Journal Article)
Chemical References
  • Cholinesterase Inhibitors
  • Insecticides
  • Organophosphorus Compounds
  • Pesticide Residues
  • Monocrotophos
  • dicrotophos
Topics
  • Animals
  • Birds (metabolism)
  • Brain (enzymology)
  • Cholinesterase Inhibitors (adverse effects)
  • Insecticides (analysis)
  • Longevity (drug effects)
  • Monocrotophos (analysis)
  • Organophosphorus Compounds (analysis)
  • Oryza (analysis)
  • Pesticide Residues (adverse effects, analysis)
  • Texas

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