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为了有效、持续地控制舞毒蛾、天幕毛虫等杨树食叶害虫对林木的危害,同时还要尽量避免在对害虫进行化学防治时破坏生态环境,本次实验选用了苦参碱、蛇麻子素的植物提取液,还有Bt生物杀虫剂,以及天幕毛虫病毒分别对舞毒蛾幼虫、天幕毛虫幼虫进行杀虫试验。试验结果表明,上述药剂的不同浓度溶液对舞毒蛾幼虫、天幕毛虫幼虫均有不同程度的杀虫效果,其中对舞毒蛾幼虫以蛇麻子素提取液的杀虫效果较好,达到了100%,Bt生物杀虫剂的杀虫效果也达到了98%(400×溶液);对天幕毛虫幼虫的杀虫效果天幕毛虫病毒在13天后以1.824×106和1.824×107较好,达到了75%以上。
In order to effectively and continuously control the damage caused by the poplar leaf insect such as Gypsy moth and the sky-caterpillar on the tree, we should also try our best to avoid damaging the ecological environment during the chemical control of pests. In this experiment, matrine and opium Of plant extracts, as well as Bt biological insecticides, as well as the Amphora caterpillar virus insecticidal tests on gypsy moth larvae, celestial caterpillars larvae respectively. The results showed that different concentrations of the above-mentioned agents had different insecticidal effects on the larvae of Gypsy moth larvae and celestial caterpillars, and the insecticidal effect on the larvae of Gypsy moths was better, The insecticidal effect of Bt biocide reached 98% (400 × solution). The insecticidal effect on the celestial caterpillar larvae was 1.824 × 106 and 1.824 × 107 after 13 days, reaching over 75% .