Effectiveness of timing insecticide applications to control the rosy apple aphid, Dysaphis Plantaginea (Passerini), on apple was studied in 1980and 1981. Applications of insecticide were timed to coincide with D. plantaginea development and tree phenology. Egg hatch occurred each year from the silver tip to centimeter green stage of 'Golden Delicious' development. The insecticides chloropyrifos and methidathion provided effective, season-long, control when applied during hatch of overwintering eggs. The addition of 70-second superior oil to the insecticides did not improve (Controlnor was an application of oil alone effective. Application of insecticides after the 1.3-cm green stage, especially contact type insecticides, usually resulted in less effective control and more leaf and fruit damage. Tactics for managing D. plantaginea and the European red mite, Panonychus ulmi (Koch), are discussed.
Document Type: Research Article
Publication date: June 1, 1983
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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.