Location of Ostrinia furnacalis (Lepidoptera: Pyralidae) Eggs and Larvae on Sweet Corn in Relation to Plant Growth Stage
Location of eggs and larvae of Asian corn borer, Ostrinia furnacalis Guenée, on mid-whorl, late-whorl, tassel, silk, and mature stages of sweet corn was examined by dissecting plants. As the plant aged, larva feeding locations shifted from the whorl to the tassel and then to all parts of the plant depending on instar. First and second instars initially fed in the whorl, then the tassel, and finally in the ear. In the tassel they were concentrated within the florets, feeding on anthers. In the ear, first and second instars were on the silk and between shuck leaves. Older instars also fed in the whorl, then in the tassel, ear, and stalk. In the tassel, third instars were in the florets but older instars bored in the stem or branches or webbed groups of florets or branches together. In the ear they bored in the shank and cob or fed on silk or kernels. The stalk was the most common feeding site for last instars. Screening for host-plant resistance should concentrate on resistance in tassels and the ear.
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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