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春季各种病菌和害虫经一冬休眠后开始活跃,对药物抵抗力差,而且树叶没有萌发,无遮挡,施药方便,果树也不会发生药害。此时应及时给果树进行“药浴”。 一、果树开花前的防治 1.及时喷洒1次渡美5度石硫合剂,可控制腐烂病,抑制红蜘蛛的越冬繁殖卵,对防治白粉病、卷叶虫、介壳虫都有明显作用。也可喷40％的福美砷100倍液。
In spring a variety of germs and pests after a winter dormancy began to active, the drug resistance is poor, and the leaves did not germinate, no shelter, easy application, fruit trees will not occur phytotoxicity. At this time should be promptly to the fruit tree “medicated bath.” First, the prevention and treatment of fruit trees before flowering 1. Timely spraying 1 Ferry 5 degrees stone sulfur mixture can control the rot disease, inhibit spider mite overwintering breeding eggs, prevention and control of powdery mildew, leaf roller insects, scale insects have a significant role. Can also spray 40% of Fu Mei Arsenic 100 times solution.