Environmental Entomology (1992) 21, 556-559

A.R. Horowitz and D. Gerling (1992)
Seasonal variation of sex ratio in Bemisia tabaci on cotton in Israel
Environmental Entomology 21 (3), 556-559
Abstract: The sex ratio of Bemisia tabaci was examined in the field, and ranged from a female-biased condition early in the season to male biased at summer's end. Laboratory studies showed that young females laid proportionately more female-producing eggs than older females, and that females with access to males throughout their life laid a higher proportion of females than those that mated only once shortly after emergence. These laboratory results provide at least partial explanations for the sex ratios observed in the field.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Database assignments for author(s): Abraham Rami Horowitz

Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
population dynamics/ epidemiology

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Bemisia tabaci	Cotton (Gossypium)	Israel