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双条衫天牛[Semanotus bifasciatus(M otschulskx)],是柏类树种的毁灭性害,此虫以成虫在被蛀寄主的枝、干的蛀道蛹室内越冬。翌年当日平均温度达10℃时的2月下旬,3月上旬成虫出木,交配,产卵;3月上、中旬幼虫孵化蛀入皮下,反复蛀食韧皮部和边材,其蛀道内充满虫粪和碎屑,因切断其输导组织,而引起树木生长衰弱,或被害部位上部枝条枯死或整株枯死,9月上、中旬化蛹,9月下旬羽化为成虫越冬。此虫为钻蛀性害虫,防止十分困难,只有在成虫期采取防治措施,方能奏效。
Semanotus bifasciatus (Motschulskx) is a devastating species of the cypress species, which overwinters as adults develop in worm-eaten branches and dry tunnel-boring pupal chambers. In the second day of the following year the average temperature of 10 ℃ when the average temperature of 10 ℃ in late February, early March adults out of wood, mating, spawning; March upper and middle larvae hatch into the skin, repeatedly eaten phloem and sapwood, And debris, due to cut off its guide tissue, causing the growth of trees frail, or damaged parts of the upper branches dead or whole plant dead in September, the mid-pupation, late September emergence into adult winter. This worm is a boring insect, to prevent very difficult, only in the adult stage to take preventive measures, can work.