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在接到某病虫的短期预报后,不能盲目地对所有田块进行防治,因为在某病虫大发生的年份,也有不发生或轻发生的田块,在某病虫轻发生的年份,也有重发生的少数田块,必须在进行充分调查的基础上,分门别类,进一步划分防治对象田,选择适当的防治方法及对口农药,有的放矢地进行防治。 一、水稻病害的调查方法 水稻病害的防治对象田主要是感病品种
After receiving a short-term forecast of a pest and disease, we can not blindly control all the plots because, in a year in which pests and diseases occur, there are also plots that do not occur or occur lightly. In a year in which pests and diseases occur lightly, There are also a few plots that have reoccurred. They must be categorized on the basis of adequate investigation, further divide the field of prevention and control and select appropriate prevention and control measures and counterpart pesticides to prevent and control them. First, the method of rice disease survey Rice disease prevention and control object is mainly susceptible varieties