Pest Management Science
Pest Management Science
5 years ago

Population dynamics of diamondback moth, Plutella xylostella (L.) in northern China: the effect of migration, cropping patterns and climate

Myron P. Zalucki, Xianhui Yin, Zhenyu Li, Youjun Zhang, Liuhong Zhu, Qingjun Wu, Baoyun Xu, Shufa Zhang
BACKGROUND The diamondback moth, Plutella xylostella (L.) is the most widely distributed pest of Brassica vegetables. Control of P. xylostella has relied on insecticides and it has developed resistance to most insecticides. Although research has clarified the resistance status and mechanisms in northern China, little work has been conducted on long-term population dynamics in the regions’ key vegetable growing areas. RESULTS We reviewed and summarized the history of P. xylostella field management practices in northern China (Haidian, Changping, Xuanhua and Zhangbei). Moths were caught in pheromone traps throughout the cropping season and P. xylostella phenology and the general trends in abundance was analyzed using DYMEX modelling software. The initial input in the spring determined population size in all years. The seasonal phenology and variation in abundance in most years and sites was simulated suggesting that the suitable climate creates the conditions for population outbreaks, and growers’ actual management level (spraying and crop hygiene) influenced population abundance. CONCLUSION Based on temperatures and using the timing of the initial peak in pheromone trap captures as a biofix, the timing of emergence of the next generation can be forecast, and more scouting and effective regional management strategies against this pest can be developed.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/ps.4885

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