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本研究用拟除虫菊脂(2.5％溴氰菊脂及20％杀灭菊脂)对松林内常见的6种马尾松毛虫天敌进行了室内毒性测定。试验结果表明:20％杀灭菊脂(40,100ppm)对异色瓢虫幼虫、成虫有较高接触毒性,但对蠋敌若虫、成虫及黑大蚁的接触毒性较低,且均低于80％敌敌畏(200,400ppm)。两种菊脂的常量喷雾对天敌有较高毒性,而超低容量喷雾除对龟纹瓢虫、寄蝇外毒性均较低。两种菊脂对黑大蚁及异色瓢虫3龄幼虫的选择性比值远小于1,说明它们对马尾松毛虫4龄幼虫具有高毒性,而对黑大蚁及异色瓢虫幼虫则相对较安全(LC_(50)毒性相差13.6～75.1倍; LC_(90)毒性相差62.8～164.7倍)。
In this study, pyrethroids (2.5% deltamethrin and 20% pyrethrum) were used to determine the indoor toxicity of six natural enemies of Dendrolimus punctatus in pine forests. The results showed that: 20% of the killed daisy (40,100ppm) had higher contact toxicity to the larvae and adults of C. heterophylla, but had lower contact toxicity to nymphs, adults and black ants % Dichlorvos (200,400ppm). The two kinds of chrysanthemum constant spray has a higher toxicity to natural enemies, while ultra-low volume spray in addition to the tortoises ladybug, send flies outside toxicity are lower. The selectivity ratio of the two chrysanthemums to the 3rd instar larvae of the black ants and the ladybird was much less than 1, indicating that they were highly toxic to the 4th instar larvae of Dendrolimus punctatus and against the black ants and the ladybird larvae The safety of LC_ (50) was 13.6 ~ 75.1 times higher than that of LC_ (50), and 62.8 ~ 164.7 times higher than that of LC_ (90)).