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Influence of Soil Class and Soil Moisture on Bioactivity of Carbofuran and Disulfoton in Corn in Greenhouse Tests: Relationship to Leafhopper1 Vector Control and Corn Stunt Disease Incidence2

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Carbofuran and disulfoton applied to com at l Ib/acre in-furrow at planting killed 100% of the test leafhoppers, Dalbltlus maidis (DeLong & Wolcott), confined for 24 hours on plants treated with insecticide up to day 27 after planting in sandy loam, silt loam, and silty clay soils at low, medium. and high levels of soil-moisture. The insecticides showed gradual reduction in performance after day 27 to day 62 when the test was concluded. Both insecticides performed best at the highest soil-moisture level and were less effective at the lower soil-moisture levels. Bioactivity of the toxicants was greater in corn planted in lighter soil than in the heavier soils, i.e., insect mortalities on insecticide- treated plants in the 3 soil classes were: sandy loam > silt loam > silty clay. Correspondingly, corn stunt disease incidence was correlated to the level of insect control.

Document Type: Research Article

Publication date: April 1, 1972

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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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