Control of the Codling Moth with Pheromone and CM Granulosis Virus, 1994

Abstract

Abstract Two formulations of CM granulosis virus, a powder (CGI-9401) and liquid (CGI-9405), were evaluated for their ability to control CM in combination with pheromone mating disruption. Before application, milk and 45 ml of NU-FILM-P were added to the 25-gal mixture of both virus formulations. Powdered milk was used first generation at 1 lb/25 gal, and liquid milk was used second generation at 1 gal/25 gal. Pheromone application was a combination of 400 Isomate- C-plus and 200 Isomate-C dispensers per acre over the entire test block. The test was conducted in a five-acre apple block at the Tree Fruit Research and Extension Center, Columbia View Orchard. The trees were 15-yr-old spur type ‘Delicious’. Virus treatments were applied to six-tree plots replicated five times using a RCB design. All virus treatments were applied at approximately 150 degree day intervals against each CM generation following the first application with a handgun sprayer at 300 psi to the point of drip, simulating a dilute spray of approximately 400 gpa. The first application against the first and second CM generation was based on an accumulation of 250 and 1200 degree days, respectively, after the capture of moths in pheromone traps. The post-treatment evaluation was made on 30 Aug. Twenty-five fruit from four trees per replicate were examined, and the number of CM injured fruit was recorded.