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Experiments on the Integrated Control of a Cotton and Lettuce Pest

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Abstract:

Inclusion bodies of a nuclear polyhedrosis virus isolated from the alfalfa looper, Autographa californica (Speyer), applied to cotton in Arizona, decreased the survival of cabbage loopers, Trichoplusia ni (Hubner), 40% throughout the season compared with chemical treatment or no treatment. Moreover, lettuce planted adjacent to the treated cotton had less than 50% fewer cabbage looper eggs than lettuce fields adjacent to chemically treated or untreated cotton fields. No differences in mortality were observed of cabbage looper larvae collected from monocrotophos treated or untreated cotton fields.

When a chemical defoliant was applied to cotton, the number of cabbage looper eggs on adjacent lettuce fields was 4 times higher than that next to nondefoliated cotton, probably because the chemically defoliated cotton became unattractive as a host plant or oviposition substrate. Application of monocrotophos to cotton reduced the total number of predators on cotton compared to Moth collections in pheromone baited light traps were extremely high but densities could not be related to a specific treatment.

Document Type: Research Article

Publication date: December 1, 1976

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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