Rose Leafhopper Control, 1993

This experiment was conducted in 3 mini blocks, each Vi acre, of 15-yr-old trees on MM 111, which measured 14.6 ft. in height and 13.4 ft. in width and were planted at a spacing of 20 × 20 ft. The experimental design consisted of six single-tree replications per treatment, with two replications per mini-block in a randomized block design. Each replicate was surrounded by one unsprayed tree on each side. Insecticides were applied on 30 Jun with a Swanson DA500 airblast sprayer, traveling at 2.4 mph and delivering 100 gpa. Other materials applied separately to all treatments were Captan and Topsin-M. Rose leafhopper control was evaluated by counting nymphs on the underside of 25 randomly selected leaves per tree.