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桃树幼果期大致在５月中旬至６月中、下旬。这一时期是桃园管理比较繁忙的季节，各种病虫猖獗危害，稍有疏忽，即对生产造成损失。６月份，受疮痂病、褐腐病菌侵染的果实开始发病；细菌性穿孔病菌侵染新梢，形成夏季溃疡；桃蛀螟第一代成虫的盛发期在５月中、下旬，６月中、下?
Peach young fruit period generally in mid-May to mid-June, late. This period is a relatively busy season for management in Taoyuan. Pests and diseases are rampant and are neglected a little, causing losses to production. In June, the fruit infected by scab and brown rot bacteria began to attack. Bacterial perforation germs invaded the shoots to form summer ulcers. The first generation adults of Daphniptera insignis spread out in mid-May, late June and June In the next?