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Laboratory Rearing and Reproduction of the Spotted Cucumber Beetle1,2,3

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Minor modifications were made in published methods for laboratory rearing of Diabrotica undecimpunctata howardi Barber, which increased the number of adult beetles produced. Observations were made on the biology of this insect which included emergence ratio of males to females, period of oviposition, number of eggs laid, and egg fertility. Significantly more males than females emerged on the first day of emergence. Overall emergence did not vary significantly from a 1:1 sex ratio.

Under the conditions of this test 59% of the eggs hatched and 66% of the larvae completed development to adults. It was found that female beetles oviposited on about 1/3 of the days available for oviposition. No Thythmic pattern was observed in oviposition.

Parthenogenetic reproduction did not occur. Egg fertility of females that had been separated from males after 24 hours decreased sharply after 14 days. Apparently multiple copulations are necessary for normal fertility.

Document Type: Research Article

Publication date: June 1, 1970

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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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