一、准确把握防治时机,及时施药(一)抓住病虫害最薄弱或最有利杀伤的时机施药和预防。就植物病害而言,在侵染循环的不同阶段,对防治药剂的反应和敏感程度是不同的。如病害在其发病初期或孢子萌发侵入植物阶段,是最薄弱的环节,对药剂敏感,抗药能力最弱,也是防治的关键时期。 First, accurately grasp the timing of prevention and control, timely application of pesticides (a) to seize the pest and disease the weakest or most favorable timing of killing and spraying. In the case of plant diseases, the response to and susceptibility to the control agent is different at different stages of the infection cycle. Such as disease in the early stages of its onset or spore germination invade the plant stage, is the weakest link, sensitive to the drug, the weakest resistance to drugs, but also a key period of prevention and treatment.