Efficacy of insecticides and biopesticides against green June beetle

Efficacy of several insecticides and biopesticides against green June beetle, Cotinis nitida, on fruit were studied in laboratory and field trials in Missouri and Arkansas. In laboratory and field trials of concentrations at or above 300 ppm Assail caused 80-100% mortality and reduced grape damage from 72% to 18%. In addition, Assail seems to have negligible effect on one beneficial, the green lacewing. Laboratory assays of Actara, Battalion, Clutch, Danitol, Voliam flexi, NIA 2302 (tolfenpyrad) all caused 100% mortality of GJB adults by 72 hrs, which were significantly greater than 60.9% caused by Avaunt or the < 41% caused by the biopesticides Azera and Ecotrol, which were significantly greater than the check. Ecotrol appeared to be repellent as it caused overly excited activity of the treated GJB adults.