Control in Potatoes, 1988:

‘Superior’ white potatoes were planted on 4 Apr in a Sassafras sandy loam field. Plots consisted of 3 rows of, potatoes, each row 25 ft long and 3 ft wide, arranged in a randomized complete block design with 4 replications. Treatments were applied with a self-propelled, high-clearance sprayer with 1 drop nozzle on each side of the row and 1 over the center of each row calibrated to deliver 50 gal/acre at 40 psi. Treatments were applied on 8 and 17 Jun. Percentage of plant defoliation was recorded on 23 Jun, 3 Jul, and 1 Aug. The number of CPB larvae/5 hills was recorded on 31 Jul. Plots were harvested and yields (cwt/acre) were recorded on 10 Aug.