Abstract

Abstract This experiment was conducted in a mature ‘Fuji’ orchard in Pateros, WA, with undertree spinner-type sprinklers. A pre-treatment count was used to randomize the treatments among trees with similar mite populations. Three single-tree replicates per treatment were used. The treated trees had buffer trees separating them in the rows, and buffer rows separated rows containing treated trees. Treatments were applied with a handgun sprayer to the point of drip on 28 Aug, 1996. Mites were sampled by collecting 20 leaves/replicate, and were kept cool until counting. Mites were removed from the leaves with a leaf-brushing machine, and counted on the sticky surface of the glass plate with the aid of a stereoscopic microscope.

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