广西蔗区的蔗螟多以二点螟为主,也有条螟和黄螟等混合发生。虽然这三种螟虫在发生期上有所差异,但四五月间,田间常有三种或两种同时出现,使蔗田缺苗断垄,造成损失。为了探索它的田间分布类型,选择田间抽样调查最佳方法,结果表明它的分布类型以负二项分布为主的聚集型,而分布的基本成分是疏松的枯心群,枯心群内的个体分布又是随机的。对蔗螟田间抽样调查方法应以平行跳跃式为最佳方法,棋盘式次之,其余方 The sugarcane borer in Guangxi sugarcane is mostly dominated by two-spotted moths, and some species such as stem borers and yellow-borers are also mixed. Although the three stem borers vary in their occurrence period, there are often three or two kinds of stems occurring simultaneously in the field during April and May, causing the missing seedlings to break the ridge and cause losses. In order to explore its field distribution type, the best method of field sampling was chosen. The results showed that its distribution type was aggregated with negative binomial distribution, while the basic composition of distribution was loose loose heart group, Individual distribution is random. The method of field sampling survey of sugarcane borer should be based on the parallel jump method is the best method, followed by the checkerboard, the rest of the parties