施用杀虫剂对泽泻田节肢动物群落的影响研究

Effect of insecticide on arthropod community in the field for Alisma orientalis (Sam.) Juzep

泽泻生长期间施用化学杀虫剂(如48%乐斯本EC)虽能对泽泻田害虫种群起到较好控制作用,但容易严重破坏节肢动物群落结构,使群落结构稳定性降低,导致泽泻田生态系统恶性发展;而施用生物农药类杀虫剂(如2.5%菜喜SC、25%优乐得WP和99%绿颖OL)既能对泽泻害虫种群起到持续稳定的控制效果,又能与环境相容,对天敌安全系数高,不容易引发害虫的再增猖獗。

During the development process of Alisma orientalis （Sam.） Juzep. , the employment of chemical pestcide such as 48% Leshiben EC has better control effect of pest population, but it will seriously damage the constitution of arthropod community, reduce the community stability, and in the end result in the malignant development of ecological system in the field for Alisrna orientalis （Sam.） Juzep.. In contrast, the biological pesticide such as 2.5% Spinosad SC, 25% Youlede WP and 99% Lying OL, while possess the persistent and stable control effect, and is compatible to the environment, with higher safe coefficient to natural enemies and hard to increase rampancy of pests.