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Biology of Euxoa tristicula in the Field and Laboratory1,2

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A moderate to severe infestation of larvae of E. tristicula Morrison on sugarbeets at Taber, Alberta, in 1967 provided an opportunity for studies on the biology of this cutworm. A diapause permits the larvae to survive the winter and to resume feeding in the spring. In the laboratory the mean durations of egg and pupal stages were 6 and 20 days, respectively, and each varied inversely with temperature. The mean preoviposition period was 9 days, mean oviposition per female was 402 (range 260-762) , and mean longevity of moths was approximately 20 days. Temperatures below 10ÂșC inhibited hatching and if hatching temperatures were not suitable, embryos died.

Document Type: Research Article

Publication date: October 1, 1969

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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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