title: Relationship between esterase activity and acrinathrin and methiocarb resistance in field populations of western flower thrips, Frankliniella occidentalis.
abstract: The western flower thrips, Frankliniella occidentalis (Pergande), is a serious pest in the south-east of Spain owing to its direct feeding on crops, transmission of the tomato spotted wilt virus and its very high level of resistance to insecticides. Mechanisms of resistance were examined using field populations of F. occidentalis with different susceptibilities to acrinathrin, methiocarb (selective insecticides), endosulfan, metamidophos and deltamethrin (broad-spectrum insecticides). Esterase activity towards alpha-naphthyl acetate and p-nitrophenyl acetate in resistant strains was significantly higher than in the reference strain (MLFOM) for both model substrates. This higher activity was significantly correlated with acrinathrin and methiocarb resistance.
authors.affiliation: Departament de Biologia Funcional i Antropologia Física, Universitat de València, Dr. Moliner 50, 46100-Burjassot, Valencia, Spain.
authors.forename: Ana C
authors.initials: AC
authors.lastname: Maymó
authors.forename: Amelia
authors.initials: A
authors.lastname: Cervera
authors.forename: M
authors.initials: M
authors.lastname: Dolores Garcerá
authors.forename: Pablo
authors.initials: P
authors.lastname: Bielza
authors.forename: Rafael
authors.initials: R
authors.lastname: Martínez-Pardo
mesh_terms: D000818:Animals; D004950:Esterases / Q000378:metabolism*; D007313:Insecta / Q000201:enzymology*; D007305:Insecticide Resistance; D007306:Insecticides; D007928:Lethal Dose 50; D008714:Methiocarb; D009284:Naphthols / Q000378:metabolism; D009596:Nitrophenols / Q000378:metabolism; D011722:Pyrethrins; D005466:Fluorocarbons
chemical_list: D004950:Esterases; D007306:Insecticides; D008714:Methiocarb; D009284:Naphthols; D009596:Nitrophenols; D011722:Pyrethrins; C008642:4-nitrophenyl acetate; C027876:alpha-naphthyl acetate; C119568:acrinathrin; D005466:Fluorocarbons