Li Z, Furlong M J, Yonow T, Kriticos D J, Bao H, Yin F, Lin Q, Feng X, Zalucki M P
Institute of Plant Protection, Guangdong Academy of Agricultural Sciences,Guangzhou 510640,China.
School of Biological Sciences, The University of Queensland,Brisbane 4072,Australia.
Bull Entomol Res. 2019 Apr;109(2):257-265. doi: 10.1017/S0007485318000500. Epub 2018 Jun 22.
Using an age-structured process-based simulation model for diamondback moth (DBM), we model the population dynamics of this major Brassica pest using the cropping practices and climate of Guangdong, China. The model simulates two interacting sub-populations (demes), each representing a short season crop. The simulated DBM abundance, and hence pest problems, depend on planting regime, crop hygiene and biological control. A continuous supply of hosts, a low proportion of crop harvested and long residue times between harvest and replanting each exacerbate pest levels. Biological control provided by a larval parasitoid can reduce pest problems, but not eliminate them when climate is suitable for DBM and under certain planting practices. The classic Integrated Pest Management (IPM) method of insecticide application, when pest threshold is reached, proved effective and halved the number of insecticide sprays when compared with the typical practice of weekly insecticide application.
我们使用一个基于年龄结构过程的小菜蛾模拟模型，根据中国广东的种植方式和气候条件，对这种主要危害十字花科作物的害虫的种群动态进行建模。该模型模拟了两个相互作用的亚种群（deme），每个亚种群代表一个短季作物。模拟的小菜蛾数量，进而害虫问题，取决于种植制度、作物卫生状况和生物防治措施。寄主的持续供应、收获作物的比例较低以及收获与重新种植之间的残留时间较长，都会加剧害虫问题。幼虫寄生蜂提供的生物防治可以减少害虫问题，但在气候适合小菜蛾生长和某些种植方式下，无法消除害虫问题。当达到害虫阈值时，经典的综合虫害管理（IPM）杀虫剂施用方法被证明是有效的，与每周施用杀虫剂的典型做法相比，杀虫剂喷雾次数减半。
