A Preliminary Report on the Woolly Aphids of Apple and Hawthorn

Author: Cox, JAMES A.

Source: Journal of Economic Entomology, Volume 32, Number 4, August 1939 , pp. 477-483(7)

Publisher: Entomological Society of America

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The woolly aphid, Eriosoma crataegi Oestl., has at times been considered the same as the woolly apple aphid, Eriosoma langierum (Hausm.). Davis (1910) reported E. crataegi as being a very serious pest of hawthorns in ornamental plantings in Chicago and compared the measurements of the segments of the antennae of the fall migrants with those of E. lanigerum. Baker (1915) stated that the fall migrants of E. crataegi are rather similar but larger than those of E. lanil gerum and it is with difficulty that the two are separated. He pointed out that E. lanigerum occurrs rather commonly upon hawthorn and that the young of spring migrants from elm will establish themselves on hawthorn in the same manner as they do on apple. Baker retained the name crataegi, although he believed it to be lanigerum, and stated that a large series of reproduction experiments with the forms occurring in nature on hawthorn should be made before placing crataegi under lanigerum. Becker (1918) carried on a number of experiments with E. crataegi and was successful in transferring apterous viviparous females from hawthorn to apple and vice versa. He stated that the hawthorn aphids do not establish as readily on apple as do the aphids from apple itself. Becker also made a study of the antennae and concluded that crataegi was a synonym of lanigerum. Hottes & Frison (1931) pointed out that the life history of E. crataegi is not well known and the species has at times been thought to be the same as E. lanigerum— a view which they thought had not been substantiated.

Document Type: Research Article

Publication date: August 1, 1939

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.
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