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１５ａ的研究结果表明：在冀中南部果产区，山楂叶螨种群消长呈单峰曲线，不同年份或同一年份不同果园的发生高峰不同，梨、桃园发生在６月下旬至７月中旬，苹果园发生在６月中旬至８月上旬。发生高峰的温湿度界限指标是旬日均温度２６．１４±２．１１℃，日均相对湿度６１．６７％±８．９２％；在发育起点温度（９．２℃）与界限指标温度范围内，种群增长与有效积温呈高度正相关，符合线性函数ｌｏｇｙ＝－３．５５７４＋２．５１９５ｌｏｇｘ，在果园和树冠内的种群空间分布属聚集型；山楂叶螨危害苹果、梨、桃树造成早期落叶的螨口指标分别是叶均３１．７９、３２．３４、１９．４７头（均指雌成螨），叶片被害指数分别为６１．２７％、６０．０７％和５８．０１％。
The results of 15a showed that the population growth of the hawthorn spider mites showed a single peak curve in the fruit producing areas in southern central Hebei, with different peak occurrences in different or same year orchards. Pear and peach trees occurred in late June to mid July, The park takes place from mid-June until early August. The peak temperature and humidity limit indicators are the daily average temperature of 26.14 ± 2.11 ℃, and the average daily relative humidity of 61.67% ± 8.92%. At the starting point of development (9.2 ℃) and the limit index temperature range There was a highly positive correlation between population growth and effective accumulated temperature, which was linear with logy = -3.5574 + 2.5195logx. The spatial distribution of population within the orchard and canopy was clustered. The hawthorn spider mite harmed the early deciduous leaves of apple, pear and peach trees The index of mite mouth was 31.79, 32.34 and 19.47 leaves respectively, both of which were female adult mites. The indices of leaf damage index were 61.27%, 60.07% and 58.01% respectively.