Effects of the mosquito larvicide GB-1111 on mallard and bobwhite embryos
Society of Environmental Toxicology and Chemistry, annual meeting abstract book
Environmental Sciences in the 21st Century: Paradigms, opportunities, and challenges, Nashville, Tennessee, November 12-16.
By: W. H. Stickel
Links
- The Publications Warehouse does not have links to digital versions of this publication at this time
- Download citation as: RIS | Dublin Core
Abstract
Golden Bear Oil or GB-1111 is a petroleum distillate that is used throughout the United States as a larvicide for mosquito pupae. The oil forms a barrier at the air-water interface, which suffocates air-breathing insects. There are few published studies on non-target effects of GB-1111 but the product label warns that ?GB-1111 is toxic to fish and other aquatic organisms.? Fertile eggs of mallards (Anas platyrhynchos) and bobwhite (Colinus virginianus) were incubated in the laboratory, and treated on days 4 or 11 of incubation with external applications equivalent to either 0, 1/3, 1, 3, or 10 times the maximum rate (5 gal/A) of field application of GB-1111. Hatching success was significantly reduced in mallards treated on day 4 or day 11 at 3 and 10 times the maximum field application, with a calculated approximate LD50 of 1.9 times the maximum field application. Most mortality occurred within a week of treatment. Hatching success of bobwhite was only reduced at the highest level of treatment. Other effects at this level in bobwhite included a significant increase in incidence of abnormal embryos/ hatchlings, lower body and liver weights of hatchlings and a two-fold increase in hepatic microsomal P450-associated monooxygenase activity (EROD) in hatchlings. Recommended rates of field application of GB-1111 are potentially toxic to mallard embryos, especially under conditions of larvicide drift or spray overlap, but unlikely to impair the survival or development of bobwhite embryos.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Effects of the mosquito larvicide GB-1111 on mallard and bobwhite embryos |
| Series title | Society of Environmental Toxicology and Chemistry, annual meeting abstract book |
| Volume | 21 |
| Year Published | 2000 |
| Language | English |
| Contributing office(s) | Patuxent Wildlife Research Center |
| Description | 230. (abstract PWA057) |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Society of Environmental Toxicology and Chemistry, annual meeting abstract book |
| First page | 230. (abst |
| Google Analytic Metrics | Metrics page |