桑天牛防治技术石鸿文（信阳地区植保植检站，信阳４６４０００）孙登金（桐柏县植保植检站）桑天生是我省桑树生产上的主要害虫之一。该虫在江、浙、豫等地２～３年发生一代，以幼虫越冬。幼虫终年可见，蛀食桑树枝下，造成桑叶减产，树势衰弱，甚至导致桑树死亡。其主要... Sang Tianwen Prevention and Control Technology Shi Hongwen (Xinyang Plant Protection and Inspection Station, Xinyang 464000) Sun Dengjin (Tongbai Plant Protection and Inspection Station) Sang Tiansheng is one of the major pests in mulberry production in our province. The insects in the river, Zhejiang, Henan and other places 2 to 3 years a generation to wintering larva. Larvae can be seen throughout the year, eating mulberry branches, resulting in mulberry yield reduction, frail weakness, and even led to the death of mulberry. Its main ...