Edaphic and Agronomic Charactes that Affect Potential for Rootworm1 Damage to Corn in Iowa2

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Many edaphic and agronomic factors influencing corn yields were measured in fields situated at random sites within 15 Iowa counties. Corn roots from each site were rated for rootworm damage each year. The rootworm portion of the study was conducted over 6 years (1964- 69), Factors influencing root-damage ratings were determined using multiple regression techniques applied through stepwise model-building procedures and path analysis. A prediction equation for root worm damage was developed based on significant edaphic and agronomic factors available to the farmer at planting time. Important factors influencing rootworm-damage ratings were percentage of clay in soil, soil potassium, soil phosphorus, slope of field, drainage of field, planting dale, and plant population. It is suggested that this damage equation could be used to advantage in a pest-management system for corn rootworms.

Document Type: Research Article

Publication date: December 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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