一、白螟的发生与为害白螟是广东省甘蔗的主耍害虫之一。根据目前已有资料,白螟主要分布在雷州半岛及海南岛蔗区。白螟不仅在苗期为害,同时在甘蔗生长中后期为害造成枯梢,因而引起的损失不亚于二点螟。据近年的观察,白螟在雷州半岛主要蔗区有日益严重的趋势。例如:1961年湛江市郊麻章的新植蔗第3代白螟枯梢率为4.3％,1964年同期新植蔗枯梢率则为16.0- First, the occurrence and damage of white borers White borers is one of the major pests in sugarcane in Guangdong Province. According to the available data, white borers are mainly distributed in Leizhou Peninsula and Hainan Island sugarcane area. White borers are not only harmed at seedling stage, but also cause shoots during the mid and late stages of sugar cane growth, resulting in losses no less than those of the second order. According to recent observations, white stem borer in Leizhou peninsula main sugar growing trend. For example: 1961 Zhanjiang suburbs of the new planted sugar cane third generation borer shoot rate was 4.3%, 1964 new crop cotyledons shoot rate was 16.0-