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A survey showed that the tydeid mite Homeopronematus (Pronematus) anconai (Baker) occurs in all grape-growing areas of the San Joaquin Valley of California. High temperatures and the pesticides used in vineyards were examined as factors that might explain why H. anconai populations are low in commercial vineyards during the summer. Cyclic high temperatures and long days were not detrimental to egg hatch, development, or reproductionof H. anconai, but sulfur and three acaricides are toxic and may limit vineyard populations. Most insecticides commonly used in California vineyards were also found to be toxic. Suggestions for selective pesticide use are made in the context of the role of H. anconai as an alternate prey of Metaseiulus (Typhlodromus) occidentalis (Nesbitt), an effective predator of the Pacific spider mite, Tetranychus pacificus McGregor.
Document Type: Research Article
Publication date: October 1, 1983
More about this publication?
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.