Field inactivation of wild-type and genetically modified Helicoverpa armigera single nucleocapsid nucleopolyhedrovirus in cotton |
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| Authors: | Xiulian Sun Xincheng Sun Wopke Van Der Werf Just M Vlak Zhihong Hu |
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| Institution: |
a Joint-Laboratory of Invertebrate Virology and Key Laboratory of Molecular Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Hubei, PR China
b Group Crop & Weed Ecology, Wageningen University, Wageningen, The Netherlands
c Laboratory of Virology, Wageningen University, Wageningen, The Netherlands |
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| Abstract: | Cotton bollworm (Helicoverpa armigera) is a serious pest on cotton in China. A specific baculovirus, H. armigera nucleopolyhedroviruses (HaSNPV) is used as a commercial biopesticide to control this pest. To improve the pesticidal properties, HaSNPV has been genetically engineered by both deleting the ecdysteroid UDP-glucosyltransferase (egt) gene from its genome (recombinant HaSNPV-EGTD) and incorporating an insect-selective toxin gene from the scorpion Androctonus australis (AaIT) (recombinant HaSNPV-AaIT). In the field, there was no significant difference among the inactivation rates of the two recombinant HaSNPVs and their parent wild-type, HaSNPV-WT. The inactivation rate of these viruses was significantly different in different years. The average half-life of HaSNPV was 0.57, 0.90 and 0.39 days in 2000, 2001 and 2002, respectively. Inactivation rates correlated well with solar radiation over these years. |
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| Keywords: | HaSNPV genetically modified virus cotton bollworm field inactivation |
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