Comparing Dupont Esfenvalerate Formulations and Permethrin for Control of Cabbage Looper and Imported Cabbageworm on Cabbage, 1994

Cabbage was transplanted on 23 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. To insure an adequate population of cabbage loopers, on 22 Jul, three plants per treatment were inoculated with 50 CL eggs from our laboratory reared colony. ICW populations were natural. Inoculated larvae were allowed to reach second instar before treatments were applied. The trial was repeated a second time on 25 Aug with another inoculation of 50 CL eggs on three more plants per treatment. ICW populations again were natural. 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 gpa at 40 psi and 2 mph, was used to apply a single application of each treatment. Bod sticker-spreader was applied at 0.1 % v/v with all treatments. Treatments for the first trial were applied on 1 Aug with evaluations made on 8 Aug. Treatments for the second trial were applied on 1 Sep with evaluations made on 7 Sep. Evaluations were made by selecting the three inoculated plants in each treatment, removing all leaves, and counting the number of live CL and ICW larvae. A two-way ANOVA was used for analysis of larvae using replicate totals.