Heavy densities of citrus red mite can affect tree health, yield, andfruit quality. Various rates of pesticides were applied to 9-yr-old‘Tango’ mandarin trees at the Lindcove Research and ExtensionCenter, Exeter, California. Treatments were assigned to eight treesper treatment on 21 Mar 2019, based on pretreatment counts ofadult citrus red mites and treatments arranged in an RCB design.Insecticide treatments combined with 0.5% Omni 6E oil were appliedat 200 psi and 200 gpa using a 100 gal high-pressure D30 diaphragmpump sprayer with mechanical agitation on 28 Mar. Miteswere sampled on five leaves from the periphery of four quadrants ofeach sample tree (20 leaves per tree). The number of adult femalecitrus red mites found on the upper side of each leaf and the numberof motile stages of E. tularensis found on the underside of each leafwere recorded every week for 4 wk after the first treatment. Themean number of pest or predatory mites per leaf were comparedbetween treatments using one-way ANOVA after log(x+1) transformationof the data after testing for an NS block effect. Means wereseparated according to Fisher’s protected least significant differencetest (P 0.05).
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