Boquel Sébastien, Zhang Jianhua, Goyer Claudia, Giguère Marie-Andrée, Clark Catherine, Pelletier Yvan
S.I.P.R.E. - Comité Nord, Achicourt, France.
Agriculture and Agri-Food Canada, Potato Research Centre, Fredericton, New Brunswick, Canada.
Pest Manag Sci. 2015 Aug;71(8):1106-12. doi: 10.1002/ps.3892. Epub 2014 Sep 25.
The objective was to assess the effect of two contact insecticides, lambda-cyhalothrin and flonicamid, and three systemic insecticides, pymetrozine, dimethoate and imidacloprid, on the behavior and potato virus Y (PVY) acquisition of three aphid species, Macrosiphum euphorbiae (Thomas), Rhopalosiphum padi L. and Aphis fabae (Scopoli).
At 1-4 days after application, contact insecticides strongly modified aphid behavior and intoxicated them. Dimethoate sprayed on potato plants did not change the behavior of the three tested aphid species, while imidacloprid slightly reduced the probing behavior of M. euphorbiae and intoxicated several R. padi. The residual effect of the insecticides (10-21 days after application) was almost non-existent. No intoxication was found, and only slight changes in the behavior of R. padi and A. fabae were observed. The acquisition of PVY by R. padi was reduced on lambda-cyhalothrin- and dimethoate-treated plants that were sprayed a few days before the test.
One systemic and two contact insecticides were effective at intoxicating aphids and reducing probing behavior soon after application. Some insecticides might sporadically reduce the spread of PVY either by modifying the behavior or reducing PVY acquisition, but their action is likely limited to a short period of time after application.
目的是评估两种接触性杀虫剂高效氯氟氰菊酯和氟啶虫酰胺，以及三种内吸性杀虫剂吡虫啉、乐果和吡虫啉对三种蚜虫，即大戟长管蚜（托马斯）、禾谷缢管蚜和豆蚜（斯科波利）的行为及马铃薯Y病毒（PVY）获取的影响。
施药后1 - 4天，接触性杀虫剂强烈改变蚜虫行为并使其中毒。喷洒在马铃薯植株上的乐果未改变三种受试蚜虫的行为，而吡虫啉略微降低了大戟长管蚜的刺探行为并使一些禾谷缢管蚜中毒。杀虫剂的残留效应（施药后10 - 21天）几乎不存在。未发现中毒现象，仅观察到禾谷缢管蚜和豆蚜行为有轻微变化。在试验前几天喷洒了高效氯氟氰菊酯和乐果的植株上，禾谷缢管蚜对PVY的获取减少。
一种内吸性杀虫剂和两种接触性杀虫剂在施药后不久能有效使蚜虫中毒并减少刺探行为。一些杀虫剂可能偶尔通过改变行为或减少PVY获取来减少PVY的传播，但其作用可能仅限于施药后的短时间内。
