目前,在大部分果区,化学防治仍然是果农防治各种果树病虫害的主要方法。就如何正确选择,合理使用药剂,介绍如下: 一、果园用药必须“对症下药” 决定使用一种农药时,首先必须了解这种农药的性能和防治对象的特点,然后“对症下药”。如生产上常用20％杀灭菊酯1500～ At present, in most fruit areas, chemical control is still the main method used by peasants to control pests and diseases of various fruit trees. On the correct choice, the rational use of agents, introduced as follows: First, the orchard medication must be “right remedy” When deciding to use a pesticide, we must first understand the characteristics of this pesticide and prevention and control of the object, and then “the right medicine.” As commonly used in the production of 20% fenvalerate 1500 ~