Control of Flea Beetles on Cabbage, 1995

Cabbage was transplanted on 13 Jun at the Vegetable Crops Research Farm near Geneva, NY. Plots consisted of two 10-ft rows on 36-inch centers with 18-inch plant spacing. Treatments were replicated 4 times in an RCB design. A backpack sprayer with a one-row boom, having 3 nozzles per row with HC 12 hollow cone tips, and delivering 30 gal/acre at 40 psi and 2 mph, was used to apply two applications of each treatment. Javelin at 1.0 lb/acre was added to Admire, Cygon and the check treatments to control Lepidoptera. Bond sticker-spreader was applied at 0.1% v/v with all treatments. Admire was applied on only 7 Jul. Other treatments were applied on 26 Jul, 2 Aug. Evaluations for flea beetles were made on 7 Aug. Evaluations were made by randomly selecting three plants per plot and visually counting flea beetles. A two-way ANOVA was used for analysis of flea beetles using replicate totals. In addition to flea beetle counts, damage ratings were taken to compare Admire to the control. The other treatments were not compared as they were applied after the appearance of flea beetles and thus already had some damage. The damage ratings (intensity of injury) were made on a scale of 0 (no damage) to 4 (severely injured) on similarly positioned leaves on 4 different plants per replication.