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Exposure to insecticides of brushland wildlife within the Lower Rio Grande Valley, Texas, USA

Environmental Pollution

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Abstract

Brushland wildlife within the Lower Rio Grande Valley of south Texas were studied following applications of eleven insecticides to nearby sugarcane or cotton fields. During the study no wildlife were found dead. Mean brain acetylcholinesterase (AChE) activity of great-tailed grackles (Quiscalus mexicanus) and mourning doves (Zenaida macroura) was significantly lower than controls following application of some organophosphorous insecticides. Brain AChE activity varied significantly among chemicals, days after exposure and application rates. Mean brain AChE activity of white-winged doves (Zenaida asiatica) and three small mammal species was not significantly different than their respective controls following application of insecticides. Mean brain AChE activity of grackles was inhibited significantly more than white-winged doves after application of Bolstar, EPN-methyl parathion, and Azodrin and significantly more than that of mourning doves after applications of Bolstar and EPN-methyl parathion. Our data indicate that there were no adverse effects on most brushland wildlife. Exposure was probably dependent upon use of the agricultural fields as feeding or resting sites and only grackles and mourning doves were regularly present in the fields.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Exposure to insecticides of brushland wildlife within the Lower Rio Grande Valley, Texas, USA
Series title:
Environmental Pollution
Volume
45
Issue:
3
Year Published:
1987
Language:
English
Contributing office(s):
Patuxent Wildlife Research Center
Description:
207-220
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Environmental Pollution
First page:
207
Last page:
220