Effects of Soybean Cropping Practices on Mexican Bean Beetle and Redlegged Grasshopper Populations

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Variations in cropping practices significantly affected the abundance of the Mexican bean beetle, Epilachna varivestis Mulsant, and the red legged grasshopper, Melanoplus femurrubrum (De Geer), in southern Indiana soybeans. Mexican bean beetle adults and larvae were more abundant in tilled soybeans than in no-till soybeans. The Mexican bean beetle was limited to one larval generation on double crop soybeans, while 2 generations developed on early planted soybeans. Late in the season, Mexican bean beetle adults left the nearly mature early planted soybeans and aggregated on the late developing double crop soybeans. No-till planting in conjunction with soybean double cropping favored red legged grasshopper populations by providing a continuous suitable habitat for their development. Changes in row-width (from 97 to 48 cm) did not significantly affect the abundance of either of these pests in double crop soybeans.

Document Type: Research Article

Publication date: December 1, 1979

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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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