Institute of Crop Protection, Guizhou University, Guiyang, Guizhou, China.
Department of Plant Protection, Institute of Vegetables and Flowers, Chinese Academy of Agricultural Sciences, Beijing, China.
Pest Manag Sci. 2018 Aug;74(8):1845-1853. doi: 10.1002/ps.4885. Epub 2018 Mar 25.
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 of P. xylostella and the mechanisms of its resistance in northern China, little work has been conducted on long-term population dynamics in the key vegetable-growing areas of the region.
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 were analysed 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 were simulated, suggesting that the suitable climate creates the conditions for population outbreaks, and growers' actual management level (spraying and crop hygiene) influenced population abundance.
Based on climate 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 effective scouting and regional management strategies against this pest can be developed. © 2018 Society of Chemical Industry.
小菜蛾，也称白菜蛾，是分布最广的十字花科蔬菜害虫。小菜蛾的防治一直依赖于杀虫剂，而且它对大多数杀虫剂都产生了抗性。尽管在中国北方已经对小菜蛾的抗性状况及其抗性机制进行了研究，但对该地区关键蔬菜种植区的长期种群动态研究却很少。
我们回顾和总结了中国北方（海淀、昌平、宣化和张北）小菜蛾田间管理措施的历史。在整个种植季节，我们使用性诱剂诱捕器捕获小菜蛾，并用 DYMEX 建模软件分析小菜蛾物候和丰度的总体趋势。春季的初始输入决定了所有年份的种群规模。模拟了大多数年份和地点的季节性物候和丰度变化，表明适宜的气候为种群爆发创造了条件，而种植者的实际管理水平（喷药和作物卫生）影响了种群丰度。
基于气候并利用性诱剂诱捕器捕获初始高峰的时间作为生物标记，可以预测下一代的出现时间，并制定出更有效的监测和区域性防治该害虫的策略。 © 2018 英国化学学会。
