论文部分内容阅读
拟除虫菊酯是松毛虫综合治理中较为理想的杀虫药剂。溴氰菊酯对3～4龄马尾松毛虫幼虫,每亩使用有效剂量为0.0125g,4～5龄幼虫为0.025g,5～6龄幼虫为0.05g;杀灭菊酯对3～4龄幼虫为0.2g,5～6幼虫为0.4g,均可获得良好的防治效果。在此剂量下,对天敌的威胁小,未发现池塘鱼类中毒死亡。药剂可以直接加水稀释,进行低容量或超低容量喷雾,也可加工成油乳剂,以喷烟雾方法使用。防治松毛虫宜在越冬代进行,可减轻对天敌的影响,且有利于菊酯农药在较低温度下药效的提高。
Pyrethroids is an ideal insecticide for the comprehensive management of pine caterpillars. Deltamethrin 3 to 4 instar Dendrolimus punctatus larvae, the effective dose per acre 0.0125g, 4 ~ 5 instar larvae 0.025g, 5 ~ 6 instar larvae 0.05g; fenvalerate on 3 ~ 4 age Larvae 0.2g, 5-6 larvae 0.4g, can be a good control effect. At this dose, the threat to natural enemies is small, and no death from pond fish poisoning was found. Pharmacy can be diluted directly with water for low-capacity or ultra-low volume spray, can also be processed into oil emulsion, to spray smoke method. Prevention and control of pine caterpillars should be carried out in the winter, can reduce the impact on natural enemies, and is conducive to pyrethrins pesticides at lower temperatures increased efficacy.