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山楂叶螨在宁夏1年发生4～6代，4月中旬9～10℃时出蛰，苹果初花期为盛。5月中旬在内膛危害，5月下旬后扩散树冠外。6月上中旬和7月中旬为发生高峰期。降水对其消长影响明显。温度在20～30℃有利山楂叶螨生长发育。
Hawthorn spider mite occurs 4 to 6 generations in Ningxia in 1 year and in mid-April at 9 ~ 10 ℃, and the early flowering stage of apple is Sheng. In mid-May in the bore harm, in late May spread outside the crown. June and mid-July for the peak period. Precipitation has a significant impact on its growth and decline. Temperature 20 ~ 30 ℃ favorable growth and development of hawthorn spider mites.