芷江县3种无公害药剂防治马尾松毛虫试验

Control of Dendrolimus punctatus Walker in Zhijiang with 3 Kinds of Non-Pollution Chemicals

摘要: 马尾松是芷江县的主要造林树种，近年来，国家生态环境建设项目林业工程，退耕还林工程、长防林建设工程、速生丰产林基地建设工程等项目大面积营造马尾松林。马尾松林在全县林业中占相当重量的比例，一旦发生马尾松毛虫，得不到及时防治就会成片枯死。因此，马尾松毛虫的防治对芷江县林业经济和森林生态体系发展有着举足轻重的作用。2020~2023年芷江县对越冬代3~4龄马尾松毛虫，选用白僵菌粉剂、苏·松质病毒和林虫清粉剂进行了马尾松毛虫林间防治试验。结果表明，这三种药剂防治马尾松毛虫效果较好，林虫清粉剂和苏·松质病毒药效快，对高虫口林分控制效果好。白僵菌药效慢，但效果好，持效长。经过几年的大面积防治应用，这3种药剂是值得推广的生物杀虫剂。

Abstract: Pinus massoniana is the main tree species for afforestation in Zhijiang Dong Autonomous County, the project of converting cropland to forest, the construction project of long-term forest protection, the construction project of fast-growing and high-yield forest base, etc. Masson pine forest occupies a considerable proportion of the county’s forestry. Once the occurrence of Dendrolimus punctatus cannot be timely control, it will wither into pieces. Therefore, the control of Dendrolimus punctatus walker plays an important role in the development of forestry economy and forest ecosystem in Zhijiang Dong Autonomous County. In 2020~2010, the control experiment of 3~4 instar Dendrolimus punctatus walker was carried out in Zhijiang Dong Autonomous County with Beauveria bassiana powder, Pine Cone virus and Linchongqing 2023. The results showed that the three insecticides had good control effects on Dendrolimus punctatus, and Linchongqing powder and su-pineal virus had good control effects on stands with high insect population. The efficacy of Beauveria bassiana is slow, but it has good effect and long lasting effect. After several years of large-scale control application, these three insecticides are worth promoting biological insecticides.