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Effects of the mosquito larvicide GB-1111 on red-winged blackbird embryos

Environmental Pollution

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Abstract

Golden Bear Oil (GB-111 I; legal trade name for GB-1313) is a petroleum distillate that is used in the United States and other countries as a larvicide for mosquito suppression. As part of a multi-species evaluation of the potential effects of GB-1111 on birds, red-winged blackbird eggs were collected, artificially incubated, and treated with one of five amounts of GB-1111 varying from 0 to 10 times the expected exposure from a spray application of the maximum recommended amount (X=47 l/ha, 5 gal/ac). The application of 10 X caused a significant reduction in hatching success. A dose-related reduction of hepatic microsomal mono-oxygenase activity (EROD) was detected. Among body weights, skeletal measurements, and age at death, only crownrump length was different among experimental groups. Overall, the potential hazard to embryos of a representative wetland passerine appears minimal until the application rate exceeds 3 X.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Effects of the mosquito larvicide GB-1111 on red-winged blackbird embryos
Series title:
Environmental Pollution
Volume
125
Issue:
3
Year Published:
2003
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
447-451
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Pollution
First page:
447
Last page:
451
Number of Pages:
5