PDF(Pubmed)
Abstract：
Riptortus pedestris (Fabricius, 1775) (Hemiptera: Alydidae) is a major soybean pest in East Asia that can cause soybean staygreen syndrome. To date, no insecticides have been registered for the control of R. pedestris in China, and these insects are primarily controlled in the field through the application of broad-spectrum insecticides including lambda-cyhalothrin (LCT) and emamectin benzoate (EMB). Here, the lethal and sublethal effects of LCT and EMB on R. pedestris were comprehensively evaluated. LCT and EMB were both found to exhibit high levels of toxicity and concentration-dependent repellent effects for R. pedestris. The exposure of third instar nymphs from the F0 generation to LC30 concentrations of LCT and EMB resulted in a significant increase in the duration of nymph development and adult pre-oviposition period (APOP), together with reductions in fifth instar nymph and adult body weight, longevity, oviposition days, fecundity, vitellarium length, lateral oviduct diameter, and vitellogenin (Vg) gene expression as compared to control treatment. Strikingly, these suppressive effects were transmitted to the F1 generation, which similarly experienced the prolongation of preadult development and the preoviposition period (TPOP). Relative to control-treated populations, the F1 generation for these insecticide-treated groups also exhibited significant decreases in population parameter values. Overall, these data offer new insight into the impact that LCT and EMB treatment can have on R. pedestris, providing a valuable foundation for the application of these pesticides in the context of integrated pest management strategies aimed at soybean crop preservation.
摘要：
Riptortuspedestris(Fabricius,1775）（半翅目：Alydidae）是东亚主要的大豆害虫，可引起大豆staygreen综合征。迄今为止,在中国，还没有登记杀虫剂来控制毒蛇。这些昆虫主要是通过应用广谱杀虫剂，包括氯氟氰菊酯（LCT）和甲氨基阿维菌素苯甲酸酯（EMB）来控制的。这里,综合评价了LCT和EMB对大鼠的致死和亚致死作用。发现LCT和EMB都表现出高水平的毒性和浓度依赖性驱除作用。从F0代开始的三龄若虫暴露于LC30浓度的LCT和EMB导致若虫发育和成虫产卵前期（APOP）的持续时间显着增加，随着五龄若虫和成人体重的减少，长寿，产卵日,繁殖力，玻璃体长度,外侧输卵管直径,和卵黄蛋白原(Vg)基因表达与对照处理相比。引人注目的是，这些抑制作用被传递给F1一代，同样经历了成年前发育和产卵前期（TPOP）的延长。相对于对照治疗的人群，这些杀虫剂处理组的F1代也显示出种群参数值的显着下降。总的来说,这些数据提供了对LCT和EMB治疗可能对R.pedestris的影响的新见解，在旨在大豆作物保存的病虫害综合管理策略的背景下，为这些农药的应用提供了宝贵的基础。
