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Low Rates of Insecticides and Nosema locustae (Microsporidia: Nosematidae) on Baits Applied to Roadsides for Grasshopper (Orthoptera: Acrididae) Control

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Wheat-bran baits treated with either low dosages of chemical insecticides (carbaryl and dimethoate) or with Nosema locustae Canning were applied to reduce abundance of grasshoppers in roadside vegetation. Both carbaryl and dimethoate provided acceptable short-term reductions. Application of baits containing 4% carbaryl or 4% dimethoate (80 g/ha) resulted in 76 and 70% mortality after 4 d, respectively. After 31 d, 10% of the grasshoppers collected from the N. locustae-treated plots were infected. Infection rates were equal in roadside populations treated with 2 or 4 kg N. locustae bait per hectare.

Document Type: Research Article

Publication date: June 1, 1987

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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