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菜青虫(pieris rapae Linne)是世界性害虫,鞍山地区的十字花科蔬菜每年造成不同程度减产,致使夏秋甘蓝面积减少,由于过去对该虫发生规律不清楚,使防治工作被动,不能有效控制发生;为了找出适宜防治时期和高效低毒新农药,生产无公害蔬菜,特做本项研究。一、试验内容及方法(一)试验内容1.田间消长规律:生活史、发生世代、各虫态发生期、各虫态历期。成虫发生期、成虫寿命;产卵期、产卵量、卵期、孵化率;幼虫发生期、幼虫龄期、各龄幼虫历期;化蛹期、化蛹率、蛹期。2.田间消长与环境影响:
Pieris rapae Linne is a worldwide pest. The cruciferous vegetables in Anshan area each year produce different degrees of yield reduction, resulting in a decrease in the area of summer and autumn cabbage. Due to the unclear rules of the insect in the past, the prevention and treatment work is passive and can not be effectively controlled ; In order to find suitable control period and efficient low toxicity of new pesticides, production of pollution-free vegetables, do this study. First, the test content and methods (A) of the test content 1 field growth and decline of the law: life history, the occurrence of generations, the occurrence of each state, the worm period. Adult period, adult longevity; spawning period, fecundity, egg stage, hatching rate; larval stage, larvae stage, larvae of each instar; pupation stage, pupation rate, pupal stage. 2 field growth and decline and environmental impact: