Effects of Heliothis zea (Lepidoptera: Noctuidae) on Soybean Yield and Quality

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Abstract:

Field cage tests were conducted to evaluate the feeding damage of Heliothis zea (Boddie) on soybeans. Seven population levels (15.00, 6.00, 4.50, 3.00, 1.50, 0.75, and 0.00 larvae per 0.3 m of row) were evaluated at soybean growth stage R5 in 1973. Three population levels (15.0, 4.0, and 0.0 larvae per 0.3 m of row) were tested on three plant growth stages (R4, R5, and R6) in 1974. Percent pod damage increased with an increase in the number of larvae. Damage to seeds reduced germination and oil content but increased percent protein and seed weight. There was no significant defoliation at any population levels or plant stages. At plant growth stages R4 and R5, 4 larvae per 0.3 m of row did not reduce yields; at R6, 15 larvae per 0.3 m of row caused no reduction.

Document Type: Research Article

Publication date: August 1, 1983

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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