Diamondback Moth, Imported Cabbageworm, and Cabbage Looper on Cabbage, 1979

Tests consisted of field trials for standard and Bacillusthuringiensis compounds on the Robbins Farm near Geneva, NY. 'Roundup' cabbage was transplanted Jul 11 for standard compound treatments and Jul 18 for B.t. treatments. Plots in standard treatment block consisted of two 50-ft rows while B.t. blocks were 10—Ft rows. Each plot was 36-inches wide, with a 16-inch plant spacing. Two buffer rows of sweet corn separated each treatment. Treatments were replicated 4 times in a randomized block design with 15 ft between replications. A 2-row, tractor-mounted boom operating at 60 psi, delivering 30 gal/acre and having 3 nozzles/row, was used to spray each treatment on a weekly schedule. Effectiveness of treatment was determined by counting diamondback, imported cabbageworm and cabbage looper larvae on 3 plants/replication. Larvae counts were made 2-4 days after application.