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苹果落花后有3个关键防治期,用药的好坏直接决定能不能有个好收成。1.花后第一遍用药:春梢旺长期,这个时候春梢生长的很快,枝叶嫩,抵抗力差,病菌在这个时候最容易侵入嫩梢,此时是防治斑点落叶病、褐斑病、白粉病、霉心病等病害的关键时期。同时花后第一次用药与清园时期相隔时间很长,
Apple has three key control after falling, the quality of medicine directly determine whether there is a good harvest. 1. The first time after anthesis medication: spring shoot Wang long, this time spring shoots grow rapidly, branches and tender, poor resistance, bacteria at this time most likely to invade the tender shoots, this time is the prevention and treatment of spotted leaves disease, brown spots Diseases, powdery mildew, mildew and other diseases of the critical period. At the same time, the first time after anthesis and Qingyuan period lasted for a long time,