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Influence of Host Plant on Deterrence by Azadirachtin of Feeding by Fall Armyworm Larvae (Lepidoptera: Noctuidae)

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The tetranortriterpenoid azadirachtin, a derivative of neem, caused more inhibition of fall armyworm, Spodoptera frugiperda (J.E. Smith), larval feeding on cotton seedling foliage compared with lima bean seedling foliage. This difference may be related to the relative proportions and interactions of naturally occurring stimulants and deterrents in the plants, because two-way choice tests demonstrated that lima beans are the preferred host. Although azadirachtin does not strongly deter feeding by fall armyworm larvae on lima beans, properties of this chemical inhibit their growth and provide good crop protection within 7 d. Implications of these results for the use of feeding deterrents and other naturally occurring compounds as crop-protection agents are discussed.

Document Type: Research Article

Publication date: April 1, 1987

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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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