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Development, survivorship and reproduction of Eretmocerus sp. nr furuhashii (Hymenoptera: Aphelinidae) parasitizing Bemisia tabaci (Hemiptera: Aleyrodidae) on glabrous and non-glabrous host plants

Published online by Cambridge University Press:  09 March 2007

B.-L. Qiu ,
P.J. De Barro  and
S.X. Ren
B.-L. Qiu
Affiliation:
Department of Entomology, South China Agricultural University, Guangzhou, Guangdong, 510642, People's Republic of China
P.J. De Barro
Affiliation:
CSIRO Entomology, 120 Meiers Road, Indooroopilly, Queensland 4068, Australia
S.X. Ren*
Affiliation:
Department of Entomology, South China Agricultural University, Guangzhou, Guangdong, 510642, People's Republic of China
*
*Fax: +86 20 85280292 E-mail: rensxcn@yahoo.com.cn
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Abstract

The developmental, survivorship and reproductive biology of Eretmocerus sp. nr furuhashii Rose & Zolnerowich parasitizing Bemisia tabaci (Gennadius) biotype B on tomato, cucumber, eggplant and collard at 26±0.5°C was studied. The mean longevity ranged from 6.5 days on tomato to 8.1 days on collard. The mean lifetime fecundities on tomato, cucumber, eggplant and collard were 35.4, 37.3, 41.4 and 46.4 eggs, whereas the mean lifetime fertility was 20.2, 22.7, 28.3 and 33.6 offspring, respectively. Developmental time was longest on cucumber (17.1 days) and shortest on collard (15.9 days). Survival rates varied significantly across host plants. Sex ratio (♀:♂) varied from 1.71 to 1.93 across the four hosts. The intrinsic rate of increase (rm) was highest (0.157) on collard and lowest on tomato (0.133). Mean generation time (R0) ranged from 14.7 to 20.9 days. All the data demonstrated that the reproductive success and overall performance of E. sp. nr furuhashii increased as the density of leaf hairs declined. As leaf hairs play a key role in determining efficacy, it is unlikely that effective biological control of B. tabaci using E. sp. nr furuhashii will be achieved on non-glabrous crop varieties.

Keywords

Eretmocerus sp. nr furuhashiiBemisia tabaciAleyrodidaeAphelinidaereproductiondevelopmentsurvivalhost plantsfecundity
Type
Research Article
Information
Bulletin of Entomological Research , Volume 95 , Issue 4 , July 2005 , pp. 313 - 319
Copyright
Copyright © Cambridge University Press 2005

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