Control of Colorado Potato Beetle on No-Till Transplanted Tomatoes with Bacillus Thuringiensis, 1986

Ohio 7870’ tomato transplants were planted no-till in 25 ft rows on 19 May with a 2-row Holland transplanter equipped with a 2-inch wide flutted coulter in front of each planter shoe. Plots consisted of a single treatment row buffered on each side by an untreated guard row. The distance between rows was 64 inches and the distance between plants within the row was 12 inches. Transplanting was made in overwintered wheat. The plots were arranged in a randomized complete block design with 4 replications. The soil was a Norfolk “A” loamy sand. All spray treatments were mixed in 10 gal of water and applied with a custom built row crop sprayer. Each row was covered by 6 drop nozzles delivering 50 gal/acre at 90 psi. Treatments were applied 8, 15, 22 and 28 Jul. In evaluating the treatments, direct counts of the number of Colorado potato beetle adults and larvae/10 plants and the % defoliation were recorded. Yields were taken on 18 Aug from a 10-ft section of row.