推广应用梨小性外激素防治梨小食心虫简结

• 机 构: 天津市林业工作站植保科,
• 出 处: 天津农林科技
• 发表日期: 1983年02期
• 关键词: 梨小食心虫 性外激素 化学防治 受害率 寄主 诱捕器 梨果 性诱剂 天敌 诱芯

一、概况梨小食心虫(Grapholitha molesta Busck)是我市为害桃、梨果的主要害虫之一。果实受害率在20—30％,严重者可达80％以上。由于梨小食心虫发生代数多,时间长,寄主复杂,因此在防治上有许多困难。过去主要靠化学防治,一般在发生期至少要喷3—4次药,才能基本上控制住为害,但化学防治存在着成本高、残留高、杀伤天敌,

I. Overview Grapholitha molesta Busck is one of the major insect pests in our city. Fruit damage rate of 20-30%, severe cases up to 80%. As Pear Mungbean occurrence of algebra and a long time, the host complex, so there are many difficulties in the prevention and treatment. In the past mainly rely on chemical control, usually at least 3-4 times during the period of spraying, in order to basically control the damage, but the chemical control exists high cost, high residual, killing natural enemies,