虫情观察方法 为害果树的桃小食心虫、梨小食心虫,都以幼虫钻入果肉为害。为了取得防治的主动权,必须抓好越冬期和产卵期的防治,等幼虫钻入果内,则使防治处于被动地位。因此,做好食心虫的测报工作非常重要。 一、桃小食心虫: 1.越冬幼虫出土期的预测预报方法有两个: (1)在上年 Pest observation methods harmful peach fruit borer moth, pears moth worms, all larvae into the pulp damage. In order to obtain the initiative of prevention and control, we must do a good job in the prevention and control of overwintering and spawning period, so that when the larvae drill into the fruit, the prevention and control is in a passive position. Therefore, it is very important to do a good job of measuring food worms. First, peach small heart worms: 1. Overwintering larvae of the forecasting method has two: (1) in the previous year