Bioassay and field-simulator studies of the efficacy of pymetrozine against peach-potato aphids, Myzus persicae (Hemiptera: Aphididae), possessing different mechanisms of insecticide resistance.
Twenty-one clones of the peach-potato aphid, Myzus persicae (Sulzer), carrying various combinations of known mechanisms of insecticide resistance were assessed for their response to the new pyridine azomethine compound, pymetrozine, in leaf-dip bioassays. Pymetrozine was also applied as a foliar spray to populations of four different UK M persicae clones on potato plants in field-simulator chambers. Neither study showed any evidence of cross-resistance to this compound. Pymetrozine, used in conjunction with other effective aphicides, such as pirimicarb and imidacloprid, can therefore play an important role in insecticide resistance-management strategies for M persicae.
Division of Plant and Invertebrate Ecology, IACR-Rothamsted, Harpenden, Herts AL5 2JQ, UK. stephen.foster@bbsrc.ac.uk
Stephen P
SP
Foster
Ian
I
Denholm
Robin
R
Thompson
D000818:Animals; D001042:Aphids / Q000187:drug effects*; D001681:Biological Assay; D001937:Brassica / Q000469:parasitology; D004305:Dose-Response Relationship, Drug; D007305:Insecticide Resistance; D007306:Insecticides / Q000494:pharmacology*; D011198:Solanum tuberosum / Q000469:parasitology; D014227:Triazines / Q000494:pharmacology*
D007306:Insecticides; D014227:Triazines; C480311:pymetrozine