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Dynamics of Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae) attacking cotton in the coastal plain of Israel

Published online by Cambridge University Press:  10 July 2009

D. Gerling
Affiliation:
Department of Zoology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
U. Motro
Affiliation:
Department of Zoology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel
R. Horowitz
Affiliation:
Department of Zoology, The George S. Wise Faculty of Life Sciences, Tel Aviv University, Israel

Abstract

The dynamics of Bemisia tabaci (Gennadius) were followed during two years in treated and untreated cotton fields in three locations in Israel. Two parasite species, Encarsia lutea (Masi) and Eretmocerus mundus Merc., were the only important natural enemies, but percentage parasitism did not rise with increase in the host population. The whiteflies reached peak populations at the end of the summer. Their distribution upon the plants was not uniform, rather, they tended to concentrate on a few leaves. The leaf bearing the maximal population was the sixth or seventh until mid-July. From then on, its location was variable according to the growth pattern of the foliage. Insecticide treatments, in particular with aldicarb, resulted in depression of both whitefly and parasite populations, but neither was exterminated.

Type
Original Articles
Copyright
Copyright © Cambridge University Press 1980

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