杨始叶螨以受精雌成螨在柳树的树干裂缝内、翘皮下、虫孔内越冬。翌年３月底日均温达７℃以上，柳树展叶盛期开始出蜇，４月上旬为出蜇盛期（占出蜇总量的８６．９％）。全年发生盛期在５月中旬至７月上旬。该螨成螨喜在卷叶、叠叶、瘤瘿叶内群集、吐丝拉网。根据该螨的发育起点温度和有效积温，利用泰安市气象局温度资料，计算出该螨在泰安地区１ａ可发生１１代，最少１０代，最多１２代 Yang beginning spider mite to female adult mites in the crack willow tree trunk, tilting, the worm hole in winter. The average temperature at the end of March the following year reached more than 7 ℃, the willow leaf expanse began to sting, early April for the sting peak (accounting for 86.9% of the total number of stings). The peak occurs throughout the year in mid-May to early July. The mites into mites like foliage, foliar leaves, tumor 瘿 leaves within the cluster, Tuili Si pull the net. According to the starting temperature and effective accumulated temperature of the mite, using the temperature data of Tai’an Meteorological Bureau, it can be calculated that the mite can occur 11 generations in the Tai’an area 1a, at least 10 generations, up to 12 generations