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Growth and Yield of Caged Cotton Plants Infested with Nymphs and Adults of Lygus hesperus

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Abstract:

Damage to individual cotton plants 'Deltapine 16', by uniform and continuous infestations of 1 late-stage nymph or adult male Lygus hesperus Knight per cage during 4 infestation periods was studied at Tucson, Arizona, in 1969. Nymph-infested plants grew taller and showed altered patterns of squaring, flowering, and bolling, as compared with noninfested controls, but no significant reductions in seed cotton yield or lint quality were detected. Nymph-infested plants yielded lower percentage weights of lint and higher percentage weights of seed. Plants infested with nymphs from the time of 1st square until Aug. 16 had significantly increased numbers of main stem vegetative branches. Plants infested with adults from the time of 1st square until 1st bloom showed altered patterns of squaring and flowering but no significant yield reductions. Lint quality and monetary value were lower on plants exposed to adults during the late infestation period from July 26 to Aug. 16.

Document Type: Research Article

Publication date: October 15, 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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