Results of the second season's experiments with sprays containing coal tar distillates of English and American origin confirm the results of 1931. The higher concentrations may give control of San Jose scale (Aspidiotus perniciosus) comparable to that obtained with a standard petroleum oil spray of 3% oil. A combination of coal tar oil and petroleum oil against aphis eggs and scale in the dormant season is suggested.
Document Type: Research Article
Publication date: April 1, 1933
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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.