《环境昆虫学报》

螟黄赤眼蜂 Trichogramma chilonis是害虫生物防治中一种重要的卵寄生蜂，其在防治害虫的同时，也会受到田间杀虫剂的影响。本研究选择高效氯氰菊酯和啶虫脒亚致死剂量，以两性生命表法计算种群参数，揭示了这两种药剂亚致死剂量对该种群生长、繁殖的影响。试验测定了高效氯氰菊酯和啶虫脒对螟黄赤眼蜂的亚致死剂量LC20值分别为0.119和1.091 mg/L。研究结果显示，经亚致死浓度LC20的啶虫脒处理后，螟黄赤眼蜂的寄生卵量显著低于对照（P<0.05），寿命(1.17 d)显著缩短，种群参数（内禀增长率 rm、周限增长率λ、净生殖力R0和世代平均历期T）均低于对照，其中净生殖力R0（27.573）显著低于对照（P<0.05）。经亚致死剂量LC20的高效氯氰菊酯处理后，螟黄赤眼蜂的单雌产卵量显著高于对照(P<0.05)。试验结果表明高效氯氰菊酯的亚致死剂量对螟黄赤眼蜂的增殖有一定的刺激作用，而亚致死剂量的啶虫脒则会影响螟黄赤眼蜂的寄生能力，在螟黄赤眼蜂盛发期，田间施用啶虫脒时，应注意其残留量对螟黄赤眼蜂的影响。

英文摘要:

Trichogramma chilonis is an important egg parasitoid in pest biocontrol, the insecticide can effect the T chilonis meanwhile control pest In the study, the sublethal concentraion of beta-cypermethrin and acetamiprid were selected to reveal the effect on development and fecundity of T chilonis by using two-sex life table The results show that the sublethal concentration (LC20)of beta-cypermethrin and acetamiprid were 0119 and 1091 mg/L, respectively The number of parasitic egg was significantly lower as compared with control (P<005), the lifespan of T chilonis was significantly decreased than control In addition, life table parameters (the intrinsic rate of increase rm, the finite rate of increase λ, the net reproductive rate R0 and mean generation time T)were lower than their respective controls, furthermore, the R0 was significantly lower as compared with control The number of eggs per female of T chilonis was significantly higher than control after treated with sublethal concentration of beta-cypermethrin The results demonstrated that sublethal concentration of beta-cypermethrin stimulated the reproduction of T chilonis, however, sublethal concentration of acetamiprid effected the parasitic ability Furthermore, the effect of residue acetamiprid on T chilonis was considered when apply it in the field during the emergence period of this instect

查看全文查看/发表评论下载PDF阅读器

关闭