松褐天牛 Monochamusalternatus在浙东沿海地区的羽化始期为 5月上旬 ,盛期为5月中旬至 6月上旬 ,末期为 7月上旬 ;室内羽化的盛期和末期比露天网室滞后 2 0天。卵、幼虫和蛹在被害树体上的数量分布 ,树干中段 >下段 >梢段 >侧枝 ;分布密度 ,树干梢段 >中段 >下段。蛀入木质部幼虫的成虫羽化率室内室外均为 70 %左右 Monochamousternatus Monochamousternatus in eastern Zhejiang coast of the emergence of early May, the peak from mid-May to early June, the end of early July; peak and indoor eclosion period than the open-air network room lag 20 days . The number distribution of eggs, larvae and pupae in the damaged trees, middle trunk> lower> shoot> lateral branches; distribution density, trunk tip> middle> lower. Entomosis of xylem larvae is about 70% indoors and outdoors