Control of Lepidopterous Pests on Late Season Broccoli, 1993

Broccoli was transplanted on 9 Aug at the Snyder Research and Extension Farm, Pittstown, NJ. Treatment plots were replicated 4 times in a randomized complete block design and consisted of single rows, 30 ft long on 5 ft centers with 3 ft between plants. Buffers were 5 ft between rows and 12 ft between plots within rows. Standard cultural practices were used throughout the trial. Treatments were applied on 18 Sep and 1 Oct with a CO2-pressurized single hollow-cone nozzle, hand-held sprayer that delivered 73.5 gal/acre at 45 psi directed at the upper surface of all leaves. Activator 90, a spreader-sticker, was added at the rate of 1 pt/100 gal to all treatments. Plots were evaluated on 27 Sep and 5 Oct by examining 5 plants from the middle of each replicate. All ICW larvae on the leaves were identified and counted.