THE IRIS WHITEFLY IN THE PACIFIC NORTHWEST

Authors: LANDIS, B. J.; GIBSON, K. E.; SCHOPP, RALPH

Source: Annals of the Entomological Society of America, Volume 51, Number 5, September 1958 , pp. 486-490(5)

Publisher: Entomological Society of America

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Abstract:

The iris whitefly, Aleyrodes spiraeoides Quaint., occurs from southern California to British Columbia. It feeds upon approximately 50 species of plants, several of which—especially potato—are of economic importance. At Yakima, Wash., adults become active in March and propagation is under way on hardy plants by the first part of May. Populations steadily increase on favored host plants until August or September. About five generations a year are possible at Yakima, each requiring 21 to 45 days. Trialeurodes abutilonea (Hald.) and T. vaporarium (Westw.) also occur on potatoes in eastern Washington and western Idaho, respectively. The immature stages of A. spiraeodes and T. abutilonea are attacked by the predator Geocoris pallens Stål and the parasite Encarsia coquilletti How.

Document Type: Research article

Publication date: 1958-09-01

More about this publication?

Annals of the Entomological Society of America is published in January, March, May, July, September, and November. Annals especially invites submission of manuscripts that integrate different areas of insect biology, and address issues that are likely to be of broad relevance to entomologists. Articles also report on basic aspects of the biology of arthropods, divided into categories by subject matter: systematics; ecology and population biology; arthropod biology; arthropods in relation to plant diseases; conservation biology and biodiversity; physiology, biochemistry, and toxicology; morphology, histology, and fine structure; genetics; and behavior.
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