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First-Generation European Corn Borer (Lepidoptera: Pyralidae) Response to Three Conservation Tillage Systems in Minnesota

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Plant injury and densities of mature larvae by first-generation Ostnnja nubllaUs (Hubner), European corn borer, were examined in chisel-plow, ridge-tillage, and notillage maize, Zea mays (L.). in southeastern Minnesota during 1985-1987. Tillage plots were split with and without terbufos application and with and without Bacjllus thurjngjensjs permethrin application in all combinations. Chisel-plow suffered greater plant injury than ridge-tillage or no-tillage, probably because oviposition was greater in chisel-plow. Ovipositing females were not responding primarily to plant height or developmental stage. Soil surface temperatures were higher in chisel-plow during the early evening when oviposition occurred, and we suggest microclimate influenced female oviposition. Larval density was highest in chisel-plow maize that received terbufos. We concluded that the risk of yield loss to first-generation O. nubllaljs in ridge-tillage and no-tillage maize did not exceed the risk of yield loss in chisel-plow maize.

Document Type: Research Article

Publication date: December 1, 1990

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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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