Control of Walnut Scale in Walnuts, 2014

This study was designed to evaluate the efficacy of reduced-risk insecticides for control of WS. This study was conducted in a mature walnut orchard spaced with 9.1 m between trees and 9.1 m between rows near near Marysville, CA. Nine treatments were replicated four times in a RCB design. Each replicate was a single tree and there was an untreated buffer tree between each replicate. Materials were applied with a hand-held orchard sprayer operating at 1,723.7 kPa with a finished spray volume of 1,870.8 liters/ha. Treatments were applied on 8 Apr 2014 (post delayed dormant) …