Lesser Peachtree Borer Control, 1990

This experiment was conducted in a 0.7 acre block of 12-yr-old trees, which measured 11 ft in height and 13 ft in width and were planted at a spacing of 20 × 20 ft. The experimental design consisted of 6 single-tree plots (3 'Sunhigh,' 3 'Loring') in a randomized block design. Insecticides were applied to runoff on 5 and 25 Jun with a handgun attached to a Durand-Wayland 100 LTS sprayer operated at 100 psi. Each tree received approximately 2 gal of spray (ca. 218 GPA) which was primarily directed at wounds on the trunk and branches. Other materials applied separately to all treatments were Benlate, Captan, Parathion, Rovral, Sevin, and Topsin-M. Insecticides were evaluated by counting and removing pupal cases from the trunk and branches at a height of 1-6 ft on 1, 14, and 29 Aug; 17 Sep; 1 Oct. Counts on each date were summed to arrive at a season total for each tree. Pupal cases were removed from all trees on 19 Jul prior to taking counts.