Apple, Tufted Apple Budmoth Control, 1981

Dilute sprays were applied to mature 18-20 ft high apple trees with a handgun operated at ca 400 psi pressure at the pump. Single-tree plots were arranged in a complete randomized block design with 5 replications. Three sprays were applied when 1st generation larvae were present (Jun 12, 23 and Jul 2) and 5 sprays were applied when 2nd generation larvae were present (Aug 17, 24, 31, Sep 8 and 18). Cover sprays of fungicides (Cyprex during the 1st half of the season and Captan plus Zineb during the 2nd half) were applied with an airblast sprayer. Treatments were evaluated by examining 100 apples/tree on Aug 9-11 and Sep 29-0ct 1 (harvest time). The sampled fruit were evenly divided between the top and bottom halves of the tree canopies. The numbers of fruit exhibiting larval feeding damage were recorded. The tufted apple budmoth population was moderately high in the test orchard.