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小地老虎是引黄灌区一种多发性害虫,对多种农作物的苗期形成灾害,往往由于防治适期和选用药剂及方法不当,难以收到满意的防治效果。1985～1987年结合我场甜菜、玉米田小地老虎防治,在系统观察的基础上,选用雌蛾卵巢解剖分级和室外诱卵孵化观察,来确定当年防治适期,并对药剂和施用方法作了筛选,现介绍于下。
Small tiger is a kind of multiple pests in the Yellow River Diversion Irrigation Area. It is difficult to receive satisfactory control effect due to improper use of appropriate agents and methods in prevention and treatment of various crops at the seedling stage. From 1985 to 1987 combined with the prevention and control of Beet, the field tiger in corn field, on the basis of systematic observation, ovary anatomical grading of female moths and hatching observation of outdoor ovary induction were selected to determine the suitable control period of the same year, and the methods of medicament and application The screening, are introduced below.