Performance of the Thermal Constant as an Indicator of the Time to Apply Cover Sprays for Codling Moth
Author: HEADLEE, THOMAS J.
Source: Journal of Economic Entomology, Volume 24, Number 1, February 1931 , pp. 291-296(6)
Publisher: Entomological Society of America
Abstract:Through a period of three years, 1928, 1929 and 1930, the thermal constant has been used for practical determination of the time when cover spraying should start for the first and for the second broods of codling moth and has seemed to be eminently successful for that purpose. It seems likely that the thermal constant can be used as a satisfactory practical determinator of the length of periods during which spray coatings must be maintained on fruit and foliage against entry by larvae of the first and of the second broods. When the average weekly minimum temperatures reach about 60º F pupation of summer larvae seems to cease and it is thought that these minimum temperatures are probably the agency limiting the number of codling moth broods.
Document Type: Research Article
Publication date: February 1931
- 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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