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Biology of the Tenlined June Beetle (Coleoptera: Scarabaeidae)

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The biology of the tenlined June beetle, Polyphylla decemlineata (Say), was studied over a 3-yr period in an almond, Prunus amygdalus Batsch, orchard in Manteca, Calif. The beetle has one generation every two years and passes through three instars. The beetle overwinters as a first instar during the first winter and as a third instar during the second winter. The majority of larvae are found 0.1-0.35 m deep in the soil. The percentage of first instars decreased with increasing soil depth from 77% of all larvae found at 0.05 m to 13% at 0.6 m. The percentage of third instars increased with increasing soil depth from 13% of all larvae found at 0.05 m to 58% at 0.6 m. Adult emergence begins in mid-June and continues through mid-October with peak emergence in early August. Adult male flight is crepuscular. Mating occurs at the female emergence site at sunset. Females laid an average of 11.6 eggs.

Document Type: Research Article

Publication date: December 1, 1989

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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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