桂林市松褐天牛生物学特性研究

Biological Features of Monochamus altematus in Guilin

通过设立诱木堆、诱捕器等方法对广西桂林的松褐天牛（Monochamusalternatus）生物学特性进行了观察和研究，结果表明：该虫当地1年发生1～2代；8月以前产卵的松褐天牛，当年均有一部分能完成1代，8月以后产卵的当年不能完成1代；松褐天牛成虫于每年的4月中旬开始羽化，至10月中旬结束，羽化高峰期为5月上、中旬。

Through observation and investigation on biological features of M. altematus in Guilin of Guangxi province, it was found that M. alternatus occurred one or two generations every year locally; some of M. alternatus could complete one generation in the same year if their oviposition period was before August, otherwise one generation could not be completed. The adults started emerging in mid April, adult stage lasted from mid October, and the peak period of adult lasted from mid to late May. We also found that some of M. alternatus could complete 2 generations, others completed 1 generation every year even if they lived in the same timber, the same time and the same environment.