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Special Issue:
昆虫生防和生态合辑Insect Biocontrol and Ecology
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| Effects of Aschersonia aleyrodis on the life table and demographic parameters of Bemisia tabaci |
| ZHANG Can1, SHAO Zhen-fang2, HAN Yue-ye3, WANG Xing-min1, WANG Ze-qing2, Peter Dennis Musa1, QIU Bao-li1, Shaukat Ali1 |
1 Key Laboratory of Bio-pesticide Innovation and Application of Guangdong Province, Department of Entomology, South China Agricultural University, Guangzhou 510642, P.R.China
2 Guangdong Engineering Research Centre of Microbial Pesticides, Guangdong New Scene Biological Engineering Co., Ltd., Yangjiang 529932, P.R.China
3 Huai’an Entry-Exit Inspection & Quarantine Bureau, Huai’an 223001, P.R.China |
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Abstract The present study reports the sublethal effects of the entomopathogenic fungus, Aschersonia aleyrodis (Webber) on Bemisia tabaci (Gennadius) (Homoptera: Aleyrodidae). A fungal suspension of A. aleyrodis isolate Aa005 containing 1×107 conidia mL–1 was sprayed against B. tabaci on eggplant leaves under greenhouse conditions. The effects of fungal application on survival as well as life table parameters of the whitefly were observed at different post inoculation periods. The results indicated that A. aleyrodis can significantly affect the survival of 1st, 2nd, and 3rd nymphal instars of B. tabaci. Developmental periods of different instar nymphs were not affected by fungal application. A. aleyrodis spores persisted well and significantly affected the survivorship of young instar nymphs of B. tabaci at different post incubation periods. Life table results suggested that A. aleyrodis has no impact on general fecundity and longevity of B. tabaci. When the pathogen was exposed to the open environment and maintained for a relatively longer period, a reduction in the reproductive rate and intrinsic rate of increase was caused by the fungal spores, though the sublethal effects were not as good as the control treatment. The results suggest that the ability of spores to suppress an increase in whitefly population persists well after incubation of spores to the external environment (up to 9 days).
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Received: 03 March 2017
Accepted:
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| Fund: This research was funded by the Science and Technology Program of Guangzhou of China (201509010023, 201604020180), the Science and Technology Program of Guangdong Province of China (2015B090903042) and the National Public Benefit research foundation (201303019). |
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Corresponding Authors:
Correspondence Shaukat Ali, E-mail: aliscau@scau.edu.cn
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| About author: ZHANG Can, E-mail: zhangcanmail@163.com; |
Cite this article:
ZHANG Can, SHAO Zhen-fang, HAN Yue-ye, WANG Xing-min, WANG Ze-qing, Peter Dennis Musa, QIU Bao-li, Shaukat Ali .
2018.
Effects of Aschersonia aleyrodis on the life table and demographic parameters of Bemisia tabaci. Journal of Integrative Agriculture, 17(2): 389-396.
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