Field evaluation of reduced-risk insecticides (Assail™ and Cyd-X™ ) for codling moth control in apples: Does adding virus help?
Lynn R. Wunderlich, firstname.lastname@example.org, University of California Cooperative Extension, 311 Fair Lane, Placerville, CA
Assail, acetamiprid, was compared to Assail with Cyd-X granulosis virus added and to azinphosmethyl when applied for control of codling moth in two commercial apple orchards. Both orchards were under mating disruption; one orchard had a high codling moth population. Populations in each orchard were monitored using traps loaded with the Trece L2 pheromone lure and with the Trece DA kairomone lure and the sex of the moths in the DA traps was identified. Assail was applied at 3.4 oz./ac with 0.5% oil using the grower’s airblast sprayer onto replicated plots in each orchard and compared to 3.4 oz. Assail with .5% oil plus 3 oz. Cyd-X/ac and the grower standard of 2-3 lb. azinphosmethyl, each treatment applied in 225-300 gal/ac. In the plots receiving the virus, a second application of virus alone was made one week after the first. Codling moth damage on fruit was assessed before and after treatment and at harvest.