Sub-lethal effects of four neonicotinoid seed treatments on the demography and feeding behaviour of the wheat aphid Sitobion avenae
Sub-lethal effects of four neonicotinoid seed treatments on the demography and feeding behaviour of the wheat aphid Sitobion avenae
复制标题
DOI：
10.1002/ps.3523
复制
发表时间：
2014-01-01
影响因子：
4.1
通讯作者：
Lei, Chao-Liang
中科院分区：
文献类型：
--
作者：
Miao, Jin;Du, Zhen-Bao;Lei, Chao-Liang
背景新烟碱类杀虫剂在中国被广泛用作麦田种子处理剂来防治谷蚜(Sitobion avenae F.)。由于新烟碱类杀虫剂在小麦植株中的降解，小麦蚜虫更有可能长期接触低浓度的新烟碱类杀虫剂。因此，预计新烟碱类除急性（致死）效应外，还可能对该害虫造成一系列亚致死效应。结果以亚致死浓度（LC10）吡虫啉、呋虫胺、噻虫啉和噻虫嗪处理的小麦植株上的燕麦链霉菌的生长和繁殖力并未受到太大影响。然而，燕麦链球菌的种群增长参数在半数致死浓度（LC50）下显着降低。电子渗透图记录显示，用 LC10 和 LC50 浓度处理的小麦植株的无探测阶段百分比较高，韧皮部汁液摄取阶段较短。结论结果表明，即使对小麦种子进行低浓度的新烟碱处理，也会对小麦蚜虫产生长期不利影响。因此，新烟碱类种子处理对小麦蚜虫的影响远大于急性毒性试验估计的影响。这些结果有助于我们了解四种测试的新烟碱类杀虫剂用作种子处理剂时的微妙影响。 (c) 2013年化学工业学会
BACKGROUNDNeonicotinoids are widely used as seed treatments in wheat fields against the grain aphid (Sitobion avenae F.) in China. Due to the degradation of neonicotinoids in wheat plants, wheat aphids are more likely to be exposed to low concentrations of neonicotinoids over long periods. It is therefore expected that neonicotinoids, aside from acute (lethal) effects, may also cause a range of sub-lethal effects on this pest.RESULTSThe growth and fertility of S. avenae feeding on wheat plants treated with a sub-lethal concentration (LC10) of imidacloprid, dinotefuran, thiacloprid and thiamethoxam were not greatly affected. However, the population growth parameters of S. avenae were significantly reduced at median lethal concentration (LC50). Electronic penetration graph recordings showed a higher percentage of no probing phase and shorter phloem sap ingestion phase on the wheat plants treated with LC10 and LC50 concentrations.CONCLUSIONThe results indicate that even low concentrations of neonicotinoid treatments on wheat seeds have long-term, adverse effects on wheat aphid. As such, neonicotinoid seed treatments have far greater effects on wheat aphids than estimated by acute toxicity tests. These results benefit our understanding on the subtle effects of the four tested neonicotinoids when applied as seed treatments. (c) 2013 Society of Chemical Industry