Arid Zone Research ›› 2021, Vol. 38 ›› Issue (2): 580-588.doi: 10.13866/j.azr.2021.02.30

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Analysis on risk assessment of Bt cotton planting in Xinjiang

WANG Zhenlin1,2(),LYU Zhaozhi1(),ZHANG Xin1,LIU Yongjian3   

  1. 1. State Key Laboratory of Desert and Oasis Ecology, Chinese Academy of Sciences, Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, Xinjiang, China
    2. University of Chinese Academy of Sciences, Beijing 100049
    3. Xinjiang Production and Construction Corps, Eighth Division, No. 121 Regiment Agriculture Development Service Center, Shihezi 832000, Xinjiang, China
  • Received:2019-10-29 Revised:2020-07-10 Online:2021-03-15 Published:2021-04-25
  • Contact: Zhaozhi LYU E-mail:wangzl806@126.com;zhaozhi_lv@sina.com

Abstract:

The potential economic losses caused by cotton bollworm (Helicoverpa amigera) in different scenarios in the cotton area of the autonomous region of Xinjiang, China, were evaluated. Data were obtained based on the biology and population dynamics of the cotton bollworm in Xinjiang over many years, in addition to cotton planting area, yield, cotton market price and costs of management of cotton bollworm and were analyzed using a population simulation method (CLIMEX model) and a random simulation method (@RISK). The simulation of the population dynamics of the cotton bollworm suggests that the weekly growth index (GIw) of this pest in Xinjiang will increase, and that the dates of emergence of overwintering pupa are clearly advanced. Global warming may exacerbate the damage and economic loss. The @RISK model simulation shows that Bt cotton can effectively suppress the cotton bollworm in this area and reduce the prevention and management costs for this pest per unit area. Our findings indicate that planting of Bt cotton combined with integrated pest management in Xinjiang can reduce the possible economical loss caused by cotton bollworm and secondary pests in the future.

Key words: cotton bollworm, CLIMEX, Bt cotton, IPM, @RISK