蔗根锯天牛,为害甘蔗在我区早已发现,但过去只是在局部蔗区,且多限于丘陵沙壤蔗田发生为害,而近两年来,在南宁地区、南宁市郊蔗区,此虫发生严重,并有逐渐扩展为害的趋势,影响甘蔗产量。为此,在1973年12月开始便对该虫进行田间调查观察,并采集幼虫回室内饲养。现将1973年12月至1974年8月底田间、室内观察的初步情况综述如下: Cane root Sawdust, harmful sugarcane has long been found in our district, but in the past only in the local cane area, and more limited to the hilly sandy cane field damage, and in the past two years, in Nanning, Nanning City sugarcane suburb, the worm occurred Serious, and gradually expand the harmful trend, affecting sugar cane production. To this end, in December 1973 began to conduct a field survey of the insects, and larvae collected back to the indoor feeding. The preliminary situation of field observation and indoor observation from December 1973 to the end of August 1974 is summarized as follows: