Bionomics of the Apple Aphid, Aphis pomi, on Young Nonbearing Apple Trees1
Authors: OATMAN, EARL R.; LEGNER, FRED E.
Source: Journal of Economic Entomology, Volume 54, Number 5, October 1961 , pp. 1034-1037(4)
Publisher: Entomological Society of America
Abstract:A study of the apple aphid, Aphis pomi Dc Geer, was conducted in 1950 on young Cortland and Red Delicious apple trees under a treated (artificial) and check (seminatural) environment. The population was highest in the check and was twice as high on Cortland ns on Red Delicious. The highest number of l1phids on Cortland occurred in the check. On Red Delicious they were more numerous in the trel1ted section. Alates were most numerous the first of July and were primarily responsible for the buildup of aphids following the second aphicide application in the treated section. The aphid population reached a peak on the check trees July 14, one week before maximum populations occurred on treated trees, then decreased slowly, and disl1ppeared by late August. Parasitism was less than 0.1%. Predators included syrphid fly and aphid lion larvae, anthocorid nymphs, and coccinellid larvae and adults of which Cocciuella novemnotata Herbst was the most abundant. Aphid abundance (intraspecific competition) was the primary biotic factor limiting the aphid population. The increase in terminal growth on treated trees was significantly greater (1% level) than that on the check.
Document Type: Research Article
Publication date: October 1, 1961
- 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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