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European Corn Borer Control in Early Sweet Corn: Role of Pre-Silk Applications and Leaf Feeding Resistance

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Abstract:

A high proportion of 1st-generation larvae of Ostrinia nubilalis (Hübner) in the ears of an early planting of a sweet corn variety resulted from initial whorl infestation, with subsequent stalk boring and eventual migration into the shank portion of the ear. Hence, for the fresh market, insecticide applications to silks alone did not provide acceptable control. Multiple pre-silk applications were unnecessary if methomyl (0.5 kg/ha) or encapsulated methyl parathion (0.6 kg/ha) were used; a single late-whorl application of either followed by 3 silk sprays was sufficient. However, with carbaryl (1.7 kg/ha) , even a full schedule of 2 whorl and 3 silk applications provided inadequate control. Addition of a carbofuran planting-time systemic treatment (2.2 kg/ha) to 3 silk spray schedules did not improve control. Use of B49×B68, a leaf feeding resistant dent genotype, coupled with 3 silk sprays of any tested material provided a degree of control comparable to a full schedule on susceptible sweet corn with the best insecticides.

Document Type: Research Article

Publication date: August 1, 1977

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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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