马尾松毛虫是国内危害最严重的森林病虫害之一。湖北省随州市有松林面积 2 7万多ｈｍ2 ,为全市林业用地面积70 % ,占全省的 1/8,在随州市马尾松毛虫危害曾十分严重 ,最大发生面积达到 40 %以上 ,每隔 3～ 4ａ为一猖獗周期 ,大发生年份松针几乎全部被吃光 ,成片青山变成一片焦枯 Masson pine caterpillar is one of the most harmful forest pests and diseases in China. There are more than 2700 hm2 of pine forests in Suizhou, Hubei Province, which is 70% of the forestry land in the whole city, accounting for 1/8 of the whole province. The damage of Masson Pine caterpillar in Suizhou City was very serious with the maximum occurring area exceeding 40% 3 ~ 4a for a rampant cycle, the occurrence of major pine needles almost all eaten, into a piece of green hills into a dead