植物源杀虫剂对杉木扁长蝽若虫的防治效果

Effects of Botanical Insecticides on the Control of Sinorsillus piliferus Larvae

杉木扁长蝽(Sinorsillus piliferus)是为害杉木种子的主要种实害虫之一。为探索杉木扁长蝽无公害防治的方法和措施,2016年在福建省沙县、将乐县杉木(Cunninghamia lanceolata)3代种子园,选用4%鱼藤酮乳油、5%桉油精可溶液剂、碧绿1%苦参碱、1.2%烟碱·苦参碱乳油和1%苦皮藤素可溶液剂,采用喷烟、喷雾技术,防治杉木扁长蝽若虫。结果显示,药后3 d,各方法防治效果均达90%以上;杉木扁长蝽若虫虫口密度迅速降低,从9头·球果-1以上降为1头·球果-1,可用作林间防治杉木扁长蝽若虫的药剂。

Sinorsillus piliferus is one of the main pests of Cunninghamia lanceolata seeds. To explore the nuisanceless control methods of S.piliferus,we did this research in 3-year seed orchards of C. lanceolata in Shaxian County and Jiangle County, Fujian Province. We chose 4% rotenone EC, 5% eucalyptus oil fine solution, green 1% matrine, 1.2% matrine nicotine missible oil and 1% Celangulins solution to prevent S.piliferus larvae by using smoke-spraying and spraying technology. The results showed that： after 3 days, the control efficiencys are higher than 90%; the population density of S.piliferus larvae reduced rapidly from 9 to 1 per strobile. This study demonstrated that these five botanical insecticides are effective in the pollution-free control of S.piliferus larvae, both by spraying or smoke-spraying.