Effects of Green Cloverworm Larval Intensity on Consumption of Soybean Leaf Tissue

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Larvae of Plathypena scabra (F.) were studied in the laboratory to determine the effect of population intensity on soybean leaf consumption. Data also were gathered on pupal weight, efficiency of food conversion, egg to adult stadia, and survivorship. Results showed that larvae reared in populations of 2 and 3 larvae/container consumed a maximum of 12.1 and 28.3% less leaf tissue than those reared singly in 2 of 4 trials. This effect was caused by a limited food supply, with no significant differences occurring in trials where food was abundant. Reduced consumption was accompanied by significantly shorter egg to adult stadia. In relating consumption data from experimental intensities to approximated populations in the field, it was evident that a linear relationship exists between leaf consumption and larval intensity at and below the economic-injury level.

Document Type: Research Article

Publication date: April 1, 1977

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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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