Comparing New American Cyanamid Products and Standard Insecticides for Control of Lepidoptera on Cabbage, 1992

Abstract

Cabbage was transplanted on 16 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 insects, three plants per replication were inoculated with 200 DBM eggs from our Geneva ‘88 lab colony, the same three plants were inoculated with 75 CL eggs from our Geneva’ 91 colony and ICW populations were natural. Larvae were allowed to reach early third instar before treatments were applied. Treatments were replicated 4 times in a randomized complete block design. A backpack sprayer with a one-row boom, having 3 nozzles per row with HC 12 hollow cone tips, and delivering 38 gal/acre at 40 psi and 2 mph, was used to apply a single application of each treatment. Inoculations were made on 31 Aug. Treatments were applied on 9 Sep and evaluated 16 Sep. Evaluations were made by selecting the three inoculated plants per replication, removing all leaves, and counting the number of live larvae. A two-way ANOVA was used for analysis of Lepidoptera using replicate totals.