Red spider, Paratetranychus pilosus, has been a serious pest on several types of fruit trees in the Erie-Chautauqua fruit section. The mites appear on the foliage early in the spring and develop from egg to adult in two to three weeks, there being such an overlapping that eggs and adults were always present; consequently effective dusts must remain active upon the foliage for some time. A lime sulphur wash, 1 to 40 easily controls red spider, though it is too strong for prune foliage, which at times may be seriously injured by 1to 75. The control by various sulphur dusts in combination with arsenate of lead or nicotine did not vary greatly, ranging from 50 to 60 percent. Soap added to a lime sulphur wash, increases its value by at least 5 to 10 percent. A1 percent lime sulphur with 6 lbs. of sulphur paste for each 100 gals. and 1 lb. of resin fish oil soap gave very satisfactory control.
Document Type: Research Article
Publication date: February 1, 1923
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.