title: Comparison of dilute and neat formulations of Anvil by ultra-low volume ground application against Anopheles quadrimaculatus in Arkansas.
abstract: Neat (undiluted) and diluted ground-applied ultra-low volume (ULV) cold aerosol formulations of sumithrin (Anvil) were evaluated against Anopheles quadrimaculatus adults. Both formulations were applied at 1.938 g/AI/ha (0.00173 lb/AI/acre). Caged sentinel mosquitoes were placed on 1.5-m stakes 30.4, 60.9, and 91.0 m downwind and perpendicular to the line of spray. Mortality was observed at 1, 12, and 24 h posttreatment. Except for 1-h readings at 30.4 and 91.0 m the neat formulation was significantly more effective than the dilute. Droplet size and density averaged 13.6 microm and 422/cm2 for dilute formulation and 14.3 microm and 251/cm2 for the neat. There was no apparent relationship between droplet size and density when compared with mosquito mortality.
authors.affiliation: Department of Entomology, University of Arkansas, 319 Agriculture Building, Fayetteville, AR 72701, USA.
authors.forename: M V
authors.initials: MV
authors.lastname: Meisch
authors.forename: David A
authors.initials: DA
authors.lastname: Dame
authors.forename: Carolyn N
authors.initials: CN
authors.lastname: Lewis
mesh_terms: D000818:Animals; D000852:Anopheles; D001131:Arkansas; D007306:Insecticides / Q000008:administration & dosage*; D009032:Mosquito Control / Q000379:methods*; D011722:Pyrethrins / Q000008:administration & dosage*
chemical_list: D007306:Insecticides; D011722:Pyrethrins; C006166:phenothrin