title: Effect of Contact Insecticides Against the Invasive Goldspotted Oak Borer (Coleoptera: Buprestidae) in California.
abstract: The goldspotted oak borer, Agrilus auroguttatus Schaeffer (Coleoptera: Buprestidae), was linked in 2008 to ongoing tree mortality in oak woodlands of southern California. Mortality of coast live oak, Quercus agrifolia Née, and California black oak, Q. kelloggii Newb., continues as this exotic phloem borer spreads in southern California. Management options are needed to preserve high-value oaks and maintain management objectives. From 2009 to 2012, we tested four contact insecticide formulations in four experiments against A auroguttatus in California. The impact of contact insecticides was evaluated ∼<1, 8, and 12 mo postapplication against A auroguttatus adults in no-choice leaf-feeding or walking bioassays. At <1 mo postapplication, bifenthrin, carbaryl, lambda-cyhalothrin, and permethrin all reduced adult survival and feeding in leaf-feeding and walking bioassays. At 8 mo postapplication, only bifenthrin reduced adult feeding, but had no effect on survivorship. At 12 mo postapplication, adult A auroguttatus survived fewer days and fed less in leaf-feeding bioassays with bifenthrin, carbaryl, and permerthin. These results support the annual application of contact insecticides prior to A auroguttatus' flight period to reduce adult leaf maturation feeding and activity on the bark surface (e.g., oviposition), but additional studies are needed to show these contact treatments can prevent tree mortality from this invasive species.
authors.affiliation: USDA Forest Service, Forest Health Protection, 602 S. Tippecanoe Ave., San Bernardino, CA 92408 (twcoleman@fs.fed.us) twcoleman@fs.fed.us.
authors.forename: Tom W
authors.initials: TW
authors.lastname: Coleman
authors.affiliation: USDA Forest Service, Forest Health Protection, 2550 Riverside Dr., Susanville, CA 96130 (ssmith11@fs.fed.us) twcoleman@fs.fed.us.
authors.forename: Sheri L
authors.initials: SL
authors.lastname: Smith
authors.affiliation: Department of Entomology and Nematology, University of California, Briggs Hall, Davis, CA 95616 (mijone01@syr.edu).|Current Address: Department of Environmental and Forest Biology, State University of New York, College of Environmental Science of Forestry, Syracuse, NY 13210.
authors.forename: Michael I
authors.initials: MI
authors.lastname: Jones
authors.affiliation: USDA Forest Service, Forest Health Protection, 333 Broadway Blvd. SE, Albuquerque, NM 87102 (adgraves@fs.fed.us).
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Graves
authors.affiliation: USDA Forest Service-Southern Research Station, 2500 Shreveport Highway, Pineville, LA 71360 (brianstrom@fs.fed.us).
authors.forename: Brian L
authors.initials: BL
authors.lastname: Strom
mesh_terms: D000818:Animals; D002140:California; D012721:Carbaryl; D001517:Coleoptera; D005247:Feeding Behavior / Q000187:drug effects; D005260:Female; D007306:Insecticides; D058865:Introduced Species; D008136:Longevity / Q000187:drug effects; D008297:Male; D009570:Nitriles; D026023:Permethrin; D011722:Pyrethrins; D013997:Time Factors
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; D026023:Permethrin; C099952:bifenthrin; D012721:Carbaryl; C037304:cyhalothrin
keywords: Quercus spp; bifenthrin; carbaryl; exotic; oak mortality