Distribution of Pink Boll worm1 Larvae in Crop Residues and Soil in Southern California

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Distribution of larvae of Pectinophora gossypiella (Saunders) in bolls, surface trash, and day-type soil was studied in the Imperial Valley of southern California. Spring emergence of moths in large screen cages indicated tJ1at 13.3% of the over wintering population came from bolls, 59.8% from trash and litter, 7.9% from the top 2 in. or soil, and 19.0% from below the 2-in. depth. Sampling under various field conditions showed that, with wet soil or heavy debris, larvae and cocoons were found principally in the surface trash and the 1st inch of soil. 'With dry field conditions or light accumulations of debris, a greater proportion of the population was found in the soil below the depth of 1 in.

Document Type: Research Article

Publication date: December 1, 1971

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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