防治苹果树棉铃虫的植物质制剂的研制

A botanical preparation for controlling the bollworm in apple trees

通过试验确定了以狠毒、萱草根和荚竹桃等１８种杀虫植物配制成的制剂“棉铃清”水剂。该药剂２００～３００倍药液处理，对棉铃虫［Ｈｅｌｉｏｔｈｉｓａｒｍｉｇｅｒａ（Ｈｕｂｎｅｒ）］２～３龄幼虫的校正死亡率为１００％～９５．６％；对危害苹果树的棉铃虫的田间防治效果为９１．３％～９６．５％，比３０％灭铃灵乳油１２００倍液的防治效果略好；果实受害果率控制在２．０％以下，仅为清水空白对照值的１０％左右。

An aqueous type insecticide prepared with l8 species of plants for controlling He-liothis armigera has been developed and named as MianLingQing. This botanical insecticide, whendiluted with water to 200～300 times,could effectivly kill the bollworm,with the corrected mor-tality for larvae in 2～3 instars being l00-95.6% and field control effectiveness 9l.3～96.5%,which were slightly higher than that by controlling with MieLingLing 50 oil, and the fruit injurywas lower than 2.0%,only l0% of that sprayed with water.