七十年代以来,我县马尾松纯林周而复始也遭到了松毛虫危害,严重影响着森林生长。1984—1985年在省林业厅、省农科院、省民航局、省林校、地区林业局等上级部门和科研单位的具体指导下,应用省农科院植保所虫菌组研制成的新型生物菌剂——青虫菌六号液剂,采用飞机喷洒防治马尾松毛虫,防治面积17.8万亩,取得了90％以上的杀虫 Since the seventies, the pure forest of Masson pine in our county has also been endangered by pine caterpillars, seriously affecting the growth of forests. 1984-1985 in the provincial Forestry Department, Provincial Academy of Agricultural Sciences, Provincial Civil Aviation Authority, the provincial forestry school, the provincial forestry bureau and other departments and scientific research units under the specific guidance of the application of the Provincial Academy of Agricultural Sciences plant protection group of bacteria developed new Biological agents - Caterpillar fungus liquid No. 6, the use of aircraft spraying control Dendrolimus punctatus, prevention and control area of ​​17.8 hectares, made more than 90% of insecticide