Insecticides were sprayed experimentally at several sites on short-grass plains vegetation by the Agricultural Research Service (ARS), United States Department of Agriculture (USDA), to determine effectiveness for grasshopper (Acrididae) control. Effects of the applications on resident wildlife were studied by the Denver Wildlife Research Center. Observations were also made on the effects of an operational range caterpillar (Hemileuca oliviae) control program with toxaphene. Direct effects on birds varied widely with the chemicals applied, spray rates, and conditions. Applications (in ounces of active ingredient per acre) that killed birds and resulted in significant population decreases were: Fenitrothion (9.6 oz), BAY 77488 (4.6 and 9.3 oz), diazinon (5.0 to 8.0 oz), and toxaphene (16 oz). Applications that resulted in significant population decreases under some conditions, but without any observed bird mortality, were: Fenitrothion (6.3 oz), Baygon (3.0-4.0 oz), and Guthion (4.0 oz). Applications without observed direct effects on wildlife were: BAY 77488 (2.5 oz), carbaryl (6.4 oz), malathion (6.8 oz), and Mobam (3.0 oz). Registration and use of pesticides for range grasshopper control should be limited to those that degrade rapidly in the environment, have the least direct impact on wildlife, and have been thoroughly field-tested. This material was digitized as part of a cooperative project between the Society for Range Management and the University of Arizona Libraries. The Journal of Range Management archives are made available by the Society for Range Management and the University of Arizona Libraries. Contact lbry-journals@email.arizona.edu for further information. Migrated from OJS platform August 2020
Scholarly peer-reviewed articles published by the Society for Range Management. Access articles on a rolling-window basis from vol. 1, 1948 up to 5 years from the current year. Formerly Journal of Range Management (JRM). More recent content is available by subscription from SRM.