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The Induction of Emergence in the Leaf-Cutter Bee Megachile rotundata, an Important Pollinator of Alfalfa

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Laboratory tests on the time-temperature relationships for the development of diapausing prepupae of the leafcutter bee Megachile rotundata (F.), showed the favorable range to extend from 19° to approximately 38°C. Below 19° development does not occur and above 38° mortality is complete. Peak temperature for development was 32°. Development is temperature-dependent and the position of the cell in the series has no effect on the maturation rate. Alternating temperatures caused a consistent delay in the onset of emergence, as well as in the time of peak emergence, even though the lower of the temperatures was within the favorable range. Recommendations are made for commercial management of overwintering prepupae.

Document Type: Research Article

Publication date: April 1, 1965

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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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