title: Effect of insecticide-treated potato plants on aphid behavior and potato virus Y acquisition.
abstract: BACKGROUND
  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).
  
  
  RESULTS
  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.
  
  
  CONCLUSIONS
  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.
authors.affiliation: S.I.P.R.E. - Comité Nord, Achicourt, France.|Agriculture and Agri-Food Canada, Potato Research Centre, Fredericton, New Brunswick, Canada.
authors.forename: Sébastien
authors.initials: S
authors.lastname: Boquel
authors.affiliation: Université de Moncton, Moncton, New-Brunswick, Canada.
authors.forename: Jianhua
authors.initials: J
authors.lastname: Zhang
authors.affiliation: Agriculture and Agri-Food Canada, Potato Research Centre, Fredericton, New Brunswick, Canada.
authors.forename: Claudia
authors.initials: C
authors.lastname: Goyer
authors.affiliation: Université de Moncton, Moncton, New-Brunswick, Canada.
authors.forename: Marie-Andrée
authors.initials: MA
authors.lastname: Giguère
authors.affiliation: Agriculture and Agri-Food Canada, Potato Research Centre, Fredericton, New Brunswick, Canada.
authors.forename: Catherine
authors.initials: C
authors.lastname: Clark
authors.affiliation: Agriculture and Agri-Food Canada, Potato Research Centre, Fredericton, New Brunswick, Canada.
authors.forename: Yvan
authors.initials: Y
authors.lastname: Pelletier
mesh_terms: D000818:Animals; D001042:Aphids / Q000187:drug effects* / Q000502:physiology / Q000821:virology*; D005247:Feeding Behavior / Q000187:drug effects; D007300:Insect Control; D007306:Insecticides / Q000494:pharmacology*; D018515:Plant Leaves / Q000254:growth & development; D016133:Polymerase Chain Reaction; D017800:Potyvirus / Q000502:physiology*; D011198:Solanum tuberosum / Q000254:growth & development*; D013045:Species Specificity; D013997:Time Factors
chemical_list: D007306:Insecticides
keywords: Aphis fabae; Macrosiphum euphorbiae; Rhopalosiphum padi; Solanum tuberosum; non-persistent virus; pest management