Cabbage Looper Control in Broccoli with Orthene Granules, 1976

’Waltham 29’ broccoli was transplanted August 15 in 3-ft rows with 17-inch spacing. Treatment plots were replicated 4 times and arranged in a randomized block design. Each plot consisted of a single 10-ft long row with an untreated row adjacent to each treatment plot. Various methods of treatment were employed and are designated as follows: Band at transplant - Banded 2 to 3 inches from plant and about 3 inches deep on both sides of the row on August 31. Furrow cut alongside row with hand cultivator, the granules dropped therein with a hand shaker and then covered. Foliar at transplant-Distributed over top of broccoli plants with a hand shaker on August 31. Foliar at transplant and lay-by - Orthene 5G (5 lb ai/acre) distributed over plants with hand shaker on August 31 and again at lay-by on September 28; Foliar at transplant and 1 lb ai/acre foliar as needed - Orthene 5G (3 lb ai/acre) distributed over plants with hand shaker on August 31 followed by Orthene 5G (1 lb ai/acre) foliar applications on September 21 and 28; Foliar at transplant plus 2 lb ai/acre foliar at 2-week intervals - Orthene 5G (2 lb ai/acre) dis-tributed over plants with hand shaker on August 31 followed by Orthene 5G (2 lb ai/acre) foliar applications on September 14 and 28; Foliar weekly - Orthene 5G (1 lb ai/acre) distributed over foliage on August 31 followed by subsequent applications at same rate on September 14, 21, and 28; Foliar spray - Applied August 31, September 7, 14, 21, and 28 with D. B. Smith 5-gallon knapsack, hand-operated compressed-air sprayer at the rate of 100 gal/acre using a D. B. Smith #147 adjustable cone nozzle. Treatments were evaluated by counting the number of loopers per 5 broccoli plants or by foliage injury ratings.