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在 2 1℃、2 4℃、2 7℃、3 0℃、3 3℃ 5种不同温度条件下 ,用新鲜的离体楠竹叶片在室内饲养竹裂爪螨 ,得出该螨实验种群的主要生物学参数 ,应用直接最优法计算该螨的世代发育起点温度和有效积温分别为 1 2 .53℃、1 50 .2 5日度 ,根据气象资料预测竹裂爪螨在长宁竹区年发生 1 3～ 1 4代 ;每年 3月下旬～ 4月上旬出蜇 ,1 1月份开始以雌成螨越冬。林间实际调查表明 ,楠竹害螨在竹区的发生与危害存在明显的春季高峰并与楠竹林的敏感生长期相吻合 ;降雨与高温严重影响楠竹害螨的生长发育 ,表现为 7、8月份高温多雨季节林间害螨种群数量呈现出急剧下降。
Under the conditions of 2 1 ℃, 2 4 ℃, 2 7 ℃, 3 0 ℃ and 3 3 ℃, the bamboo mites were bred indoors with fresh P. nigra leaves. The results showed that the experimental population According to the main biological parameters, the starting generation temperature and the effective accumulated temperature of the generation of mites were calculated by the direct optimal method, respectively, at 12.53 ℃ and 1 50.25 days. According to the meteorological data, Occurred 13 ~ 14 generations; every year from late March to early April stings, January 1 began to female adult mites overwintering. Actual forest surveys showed that there was a clear spring peak in the occurrence and damage of Phyllostachys meyeri in bamboo area and coincided with the sensitive growth period of Phyllostachys pubescens forest. The effects of rainfall and high temperature on the growth and development of Phyllostachys meyeri, In August, the number of mite mites in the forest during the hot and rainy season showed a sharp decline.