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Wireworms in Sweet Potatoes; Resistance to Cyclodiene Insecticides and Control with a Midsummer Application of Insecticide Over Foliage

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In 1962, wireworms attacking sweet potatoes were found to have developed resistance to widely used cyclodiene insecticides in some areas of North Carolina. DDT controlled resistant wireworms effectively. Diazinon gave poor control of wireworms in sweet potatoes when it was incorporated into the soil prior to planting, but a foliage-surface application during August showed control. During 1963 and 1964 diazinon gave good control of wireworms when applied on the surface late in July at the rate of 3 lb active ingredient per acre in a granular formulation. Applications late in August were less effective. Applications made both in July and August were no better than the July treatment alone. Certain other compounds tested also showed effective control when applied to the surface late in July. Insecticides incorporated in the soil were less effective in organic soils than in sandy soils. Soil type appeared to have little effect on control by surface-applied materials.

Document Type: Research Article

Publication date: February 1, 1966

More about this publication?
  • 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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