Control of the Cabbage Looper and Imported Cabbageworm on Cabbage, 1976

‘Defender’ cabbage was transplanted in 2 row plots 33-feet long on Aug 24’76. Plants were spaced 18-inches in row with 36-inches between rows. Each plot was buffered by 2 guard rows and the treatments arranged in a randomized complete block design with 4 replications. The soil was a Norfolk “A” loamy sand. The granular insecticide sidedress treatments were applied with a double spout electric drive Gandy applicator (Model 901-2). The treatments were applied 4-6 inches on either side of the row by placing the Gandy hose outlets behind the inside cultivator teeth. Over the foliage treatment with granules was applied with the same equipment but the material was distributed in a 12 inch band over the row. All sprays were mixed in 1.5 gallons of water and applied at the rate of 25 gal/A with 40 psi. Treatments were applied with a wheelbarrow-type sprayer using CO2 for spray discharge. The spray boom was equipped with drop nozzles and each row was covered by 3 nozzles. Treatments were applied on Sep 8, 17, and 23; Oct 1 and 11. Foliage injury ratings ranged from 1 to 5 and were indexed as follows: 1) 0-3% damage - odd holes on leaves; 2) 4-10% damage - few leaves with holes; 3) 11-25% damage - moderate number of leaves with holes; 4) 26-50% damage - most leaves with holes; and 5) 51-100% damage - crown damage and/or all leaves with holes. None of the products were phytotoxic. Insect pressure was lighter than normal in 1976. The treatment labeled CC 3824 is a granular formulation of Orthene. The compound is systemic in nature and can be absorbed by the foliage or by the roots.