Observations made on several hundred specimens for five consecutive seasons, both in the field and in the insectary, indicate that favorable temperatures and humidity are the most influential factors in promoting normal seasonal development of the European corn borer (Pyrausta nubilalis Hūbn.)1 All stages of development are either hastened with an excess of heat, as in the seasons of 1929 and 1930, or are retarded with a preponderance of low temperatures, as in the seasons of 1921iand 1927. High humidity caused by heavy precipitation or an accumulation of moisture from other sources is indispensable to the insects' development. The average date for the beginning of pupation in the field was June 9; and that for the beginning of adult emergence, June 22. The average date for the beginning of oviposition was June 25; that for maximum oviposition, about July 10. and practically no eggs were laid after July 26.
Document Type: Research Article
Publication date: April 1, 1931
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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.