苯甲酰基脲类杀虫剂对绿盲蝽的生物活性及亚致死影响

本文系统地比较了有代表性的4种苯甲酰基脲类杀虫剂对绿盲蝽Apolygus lucorum(Meyer-Dür)的生物活性和亚致死剂量对绿盲蝽生长发育及繁殖的影响。结果表明,苯甲酰基脲类杀虫剂对绿盲蝽各龄若虫均有较高的毒力,供试苯甲酰基脲类杀虫剂中,氟啶脲对绿盲蝽2龄若虫的毒力最高,其LC50为51.63 mg/L;氟铃脲对其3龄若虫毒力最高,其LC50为66.87 mg/L;杀铃脲对绿盲蝽4龄若虫毒力最高,其LC50为93.04 mg/L,3种药剂毒力均高于马拉硫磷。以4种苯甲酰基脲类杀虫剂LC30～40剂量处理绿盲蝽若虫后,对其存活若虫的生长发育和繁殖产生明显的后续影响。氟铃脲对试虫的影响最大,处理2龄若虫,表现为其若虫发育历期延长、成虫产卵量略有降低、成虫寿命降低;处理4龄若虫,羽化率降低、成虫产卵量、成虫寿命均降低。

Bioactivity and sublethal effects of benzoylphenylurea insecticides on Apolygus lucorum

This paper systematically compares the bioactivity and sublethal effects of four benzoylurea insecticides on Apolygus lucorum （Meyer-Dtir）. The results show that all four insecticides possess high toxicity to the nymphs of this pest. More specifically, chlorfluazuron had the highest toxicity to 2nd instar nymphs of A. lucorum （LCso of 51.63 mg/L） , hexaflumuron had the highest toxicity to 3rd instar nymphs （ LC50 66.87 mg/L） and triflumuron had the highest toxicity to 4th instar nymphs （ LC50 of 93.04 mg/L）. The toxicity of all three of these insecticides was higher than that of malathion. Additionally, sub-lethal doses （i. e. LC30-40） of these insecticides significantly influenced the growth, development and survival of A. lucorum. Among the four insecticides tested, hexaflumuron had the greatest sublethal effects. 2nd instar nymphs treated with this insecticide had a slower developmental rate and the subsequent adults had less fecundity and shorter longevity. The survival of 4th instar nymphs was also reduced by sublethal doses of this insecticide.