title: Baseline Susceptibility of Lygus lineolaris (Hemiptera: Miridae) to Novaluron.
abstract: Tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), populations were collected from field locations in the Mississippi River Delta of Arkansas, Louisiana, and Mississippi. Third-instar F(1) nymphs from each field location, in addition to a laboratory colony, were screened for susceptibility to novaluron. Both a glass vial bioassay and a diet-incorporated bioassay used dose-response regression lines to calculate LC(50) and LC(90) values for novaluron. Mean LC(50s) for glass vial bioassays ranged from 44.70 ± 3.58 to 66.54 ± 4.19 μg/vial, while mean LC(50s) for diet-incorporated bioassays ranged from 12.10 ± 0.77 to 17.63 ± 2.42 μg/200 ml of artificial diet. A comparison of LC(50) values from the same field population screened using both bioassay methods failed to show a relationship. LC(50) values from field locations were compared with a historically susceptible population from Crossett, AR. Results indicated that considerable variability in susceptibility to novaluron exists within field populations of tarnished plant bugs across the Delta, including some locations with lower LC(50) values than a historically susceptible population.
authors.affiliation: United States Department of Agriculture, Agricultural Research Service, Southern Insect Management Research Unit, 141 Experiment Station Road, Stoneville, MS 38776 (katherine.parys@ars.usda.gov; glsnod@gmail.com; randy.luttrell@ars.usda.gov; clint.allen@ars.usda.gov; nathan.little@ars.usda.gov) katherine.parys@ars.usda.gov.
authors.forename: Katherine A
authors.initials: KA
authors.lastname: Parys
authors.affiliation: United States Department of Agriculture, Agricultural Research Service, Southern Insect Management Research Unit, 141 Experiment Station Road, Stoneville, MS 38776 (katherine.parys@ars.usda.gov; glsnod@gmail.com; randy.luttrell@ars.usda.gov; clint.allen@ars.usda.gov; nathan.little@ars.usda.gov).
authors.forename: Gordon L
authors.initials: GL
authors.lastname: Snodgrass
authors.affiliation: United States Department of Agriculture, Agricultural Research Service, Southern Insect Management Research Unit, 141 Experiment Station Road, Stoneville, MS 38776 (katherine.parys@ars.usda.gov; glsnod@gmail.com; randy.luttrell@ars.usda.gov; clint.allen@ars.usda.gov; nathan.little@ars.usda.gov).
authors.forename: Randall G
authors.initials: RG
authors.lastname: Luttrell
authors.affiliation: United States Department of Agriculture, Agricultural Research Service, Southern Insect Management Research Unit, 141 Experiment Station Road, Stoneville, MS 38776 (katherine.parys@ars.usda.gov; glsnod@gmail.com; randy.luttrell@ars.usda.gov; clint.allen@ars.usda.gov; nathan.little@ars.usda.gov).
authors.forename: K Clint
authors.initials: KC
authors.lastname: Allen
authors.affiliation: United States Department of Agriculture, Agricultural Research Service, Southern Insect Management Research Unit, 141 Experiment Station Road, Stoneville, MS 38776 (katherine.parys@ars.usda.gov; glsnod@gmail.com; randy.luttrell@ars.usda.gov; clint.allen@ars.usda.gov; nathan.little@ars.usda.gov).
authors.forename: Nathan S
authors.initials: NS
authors.lastname: Little
mesh_terms: D000818:Animals; D001131:Arkansas; D020062:Heteroptera / Q000254:growth & development; D007305:Insecticide Resistance; D007306:Insecticides; D007928:Lethal Dose 50; D008145:Louisiana; D008922:Mississippi; D009758:Nymph; D010671:Phenylurea Compounds
chemical_list: D007306:Insecticides; D010671:Phenylurea Compounds; C471805:novaluron
keywords: novaluron; susceptibility; tarnished plant bug