氰氟虫腙亚致死剂量对甜菜夜蛾生长发育和繁殖力的影响

Sublethal effects of metaflumizone on the development and reproduction of the beet armyworm,Spodoptera exigua

本文研究了氰氟虫腙的亚致死剂量LC15(28.423μg/mL)和LC25(41.363μg/mL)对甜菜夜蛾Spodoptera exigua(Hübner)亲代和子1代的一些生物学特性的影响。结果表明:LC15和LC25处理组与对照组相比,甜菜夜蛾亲代的化蛹率,羽化率和单雌产卵量分别降低了49.3%,60.0%;♀(12.65%,25.09%)和♂(13.14%,28.91%);25.6%,65.7%,畸形蛹率分别提高了10.5%,14.4%。子1代的化蛹率,羽化率和单雌产卵量分别降低了11.8%,24.6%;♀(9.48%,21.54%)和♂(11.61%,24.08%);14.4%,54.3%,畸形蛹率分别提高了4.1%,5.8%。另外子1代的孵化率、幼虫的存活率降低,蛹期和成虫期缩短,产卵前期延长,产卵期显著缩短。总体来说,LC15和LC25剂量的氰氟虫腙对甜菜夜蛾亲代与子1代的生物特性都有不同程度的影响,并且LC25剂量对甜菜夜蛾的影响要比LC15剂量大。

The effects of sublethal concentrations of metaflumizone,topically applied for 96 h at LC15 （28.423 μg/mL） and LC25 （41.363 μg/mL）,on the biological characteristics of the beet armyworm,Spodoptera exigua （Hübner）,were investigated in parental and F1 generations.The results show that the pupation rate,emergence rate and total number of eggs laid by one female in both generations were significantly lower in the LC15 or LC25 groups than in the control group.The proportion of unhealthy pupae in the LC15 or LC25 groups increased by 10.5% and 14.4% respectively in the parental generation,and by 4.1% and 5.8% respectively in the F1 generations.In addition,compared to the control group,hatching and survival rates and duration of the pupal and adult stages were reduced in the F1 generation.In addition,the adult preoviposition period was extended and the female reproductive period significantly shortened.The biological characteristics of both the parental and F1 generations were adversely affected when parental larvae were exposed to LC15 or LC25 doses of metaflumizone.Generally,the sublethal effect of the LC25 dose was more significant than that of LC15 treatment.