Aphid Control, 1989

This test was conducted in a 2-yr-old orchard with under-tree irrigation. The experimental design was a randomized complete block. There were 4 single-tree replicates/treatment. Treatments were applied to the point of drip with a handgun sprayer operated at 300 psi. Per-acre rates were based on a dilute application of 400 gal/acre. Dates of applications were 10-12 Jun with the exception of Safer Insecticide Concentrate, which was applied on 23 Jun and 18 Jul. Aphid densities were determined by counting aphids on the most infested leaf and on three tagged terminals/tree. Counts were taken at one-wk intervals.