PDF(Pubmed)
Abstract：
The toxicity and sublethal effects of three insecticides (spirotetramat, cyantraniliprole, and pymetrozine) on Aphis gossypii, a major agricultural pest, were investigated. The nymphal stage showed greater susceptibility than the adult stage to all the insecticides, with a difference of up to 8.9 times at the LC50 of spirotetramat. The effects of sublethal concentrations (LC10, LC30, LC50, and LC70) of the insecticides on the on the developmental period, survival rate, adult longevity, fecundity, and deformity rate were compared with those of the control. Compared with the control, cyantraniliprole and pymetrozine did not significantly affect the developmental period in the parental or F1 generation when applied at the nymphal stage at any concentration. Nonviable nymphs occurred in the F1 generation when both nymphs and adults were treated with spirotetramat and cyantraniliprole but not in the F2 generation. The age-specific maternity (lxmx) of A. gossypii treated with sublethal concentrations (LC10, LC30) decreased with increasing concentration. Spirotetramat at the LC30 resulted in significant differences in all life table parameters (R0, rm, λ, T, DT) compared with those of the control. Similarly, compared with that of the control (43.8), the net reproductive rate (R0) significantly decreased for all the insecticides except cyantraniliprole at the LC10 (37.5). Therefore, this study indicated that sublethal concentrations (over the LC30) of spirotetramat, cyantraniliprole, or pymetrozine might be useful for the density management of A. gossypii.
摘要：
三种杀虫剂（spirotetramat，cyantraniliprole,和pymetrozine）在棉签上，一种主要的农业害虫，被调查了。若虫阶段对所有杀虫剂的敏感性比成年阶段高，在螺四胺的LC50上相差高达8.9倍。杀虫剂的亚致死浓度（LC10，LC30，LC50和LC70）对发育期的影响，存活率,成人长寿，繁殖力，并将畸形率与对照组进行比较。与对照相比，在若虫阶段以任何浓度施用时，cyclaniliprole和pymetrozine都不会显着影响亲本或F1代的发育期。当若虫和成虫都用螺虫和蓝虫处理时，F1代中出现了无活力的若虫，但F2代中没有。用亚致死浓度（LC10，LC30）处理的棉草的年龄特异性产妇（lxmx）随浓度的增加而降低。在LC30的Spirotetramat导致所有寿命表参数的显着差异（R0，rm，λ,T,DT)与对照组相比。同样，与对照组(43.8)相比，除LC10（37.5）的蓝藻外，所有杀虫剂的净繁殖率（R0）均显着降低。因此,这项研究表明，亚致死浓度（超过LC30）的螺四胺，cyantraniliprole,或pymetrozine可能对棉曲霉的密度管理有用。
