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随着Bt棉在我国的广泛种植,绿盲蝽Lygocoris lucorum Meyer-Dr的危害日益加重。化学防治作为棉田盲蝽综合治理的重要策略,仍是其主要的防治手段。本研究主要用闪烁管药膜法和点滴法两种测定方法评价了传统杀虫剂、新型杀虫剂等30种杀虫剂对绿盲蝽成虫的急性触杀毒力,其中多种杀虫剂是首次使用两种生测方法同时进行毒力测定。结果表明:有机氯类、有机磷类、氨基甲酸酯类和拟除虫菊酯类等传统杀虫剂对绿盲蝽成虫具有较高的触杀活性。8种对绿盲蝽成虫具有较高毒力的药剂,其中5种为传统杀虫剂,分别为马拉硫磷、毒死蜱、联苯菊酯、灭多威和硫丹。新型吡咯类杀虫剂对绿盲蝽表现出较高毒力,以氟虫腈的毒力最高,两种生测方法测定的LC50分别为0.13μg·mL-1和0.15μg·mL-1。而昆虫生长调节剂、抗生素类及植物源杀虫剂对绿盲蝽成虫没有明显的触杀活性。
With the widespread planting of Bt cotton in our country, the damage of Lygocoris lucorum Meyer-Dr is getting worse. As an important strategy of comprehensive management of Apodemus agaricus, chemical control is still the main control method. In this study, sclerotic tube membrane assay and spotting method were used to evaluate the acute toxicity of 30 insecticides, including the traditional insecticides and new insecticides, to the adult Lygus auricula. The insecticides It is the first time that two bioassay methods are used for simultaneous virulence determination. The results showed that traditional pesticides such as organochlorine, organophosphorus, carbamate and pyrethroid had higher contact activity to adult Lygus bugs. Eight kinds of agents which have high virulence to adult Lygus bugs, of which five are traditional insecticides, namely malathion, chlorpyrifos, bifenthrin, methomyl and endosulfan. The new pyrrole insecticides showed higher toxicity to Apolygus lucorum, with the highest toxicity of fipronil. The LC50 values measured by the two methods were 0.13μg · mL-1 and 0.15μg · mL-1, respectively. Insect growth regulators, antibiotics and plant-based insecticides have no obvious contact activity against adult Lygus bugs.