The effect of aerial application of Zectran on brain cholinesterase activity in forest songbirds
| Autor: | Richard A. Fleming, Peter A. Pearce, Stephen B. Holmes, Daniel G. Busby |
|---|---|
| Rok vydání: | 1987 |
| Předmět: |
Insecticides
Health Toxicology and Mutagenesis Toxicology Aerial application Fenitrothion Birds chemistry.chemical_compound Animal science Ecotoxicology Animals Mexacarbate Spruce budworm Cholinesterase integumentary system biology Brain General Medicine Pesticide biology.organism_classification Pollution Choristoneura fumiferana chemistry biology.protein Carbamates Cholinesterase Inhibitors |
| Zdroj: | Archives of environmental contamination and toxicology. 16(5) |
| ISSN: | 0090-4341 |
| Popis: | The carbamate insecticide Zectran® (active ingredient [AI] mexacarbate) was applied aerially to two 300 ha blocks of coniferous forest, one at a dosage rate of 70 g AI/ha and the other at 140 g AI/ha. Brain cholinesterase (ChE) activity was determined in 372 exposed and control forest song-birds representing seven species. Brain ChE activity was similar among controls of all species studied. Among exposed birds, ChE activity was lowest in individuals from the high-dose block, although differences were not statistically significant. Warbler ChE activity showed a statistically significant relationship to dosage rates. Spray deposit was four times as great on the high-dosage block as on the low one. Zectran® provides a margin of safety to songbirds exceeding that of the organophosphorus insecticide fenitrothion which is currently used on a widespread operational basis against spruce budworm (Choristoneura fumiferana) in New Brunswick, Canada. |
| Databáze: | OpenAIRE |
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