Control of Cabbage Looper, Diamondback Moth and Imported Cabbageworm on Cabbage with Pyrethroid Insecticides, 1996

‘Bravo’ cabbage were planted in 1 row plots 35 ft. long on 31 Jul. Plants were spaced 22 inches apart in the row with 72 inches between rows. The treatments were arranged in a RCB design with 3 replications. The soil was a Norfolk “A” loamy sand. All spray treatments were mixed in 2.0 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 30 psi. Treatments were applied on 29 Aug; 4, 11, 19, 25 Sep and 2 Oct. Foliage injury was rated on a scale of 1–6; 1 = no apparent insect feeding; 2 = minor insect feeding on wrapper or outer leaves, 0-1% leaf area eaten; 3 = moderate insect feeding on wrapper outer leaves with no head damage, 2-5% leaf area eaten; 4 = moderate insect feeding on wrapper or outer leaves with minor feeding on head, 6-10% leaf head unmarketable during normal marketing conditions; 5 = moderate to heavy feeding on wrapper and head leaves and moderate number of feeding scars on head, 11 -30% of leaf area eaten; 6 = considerable insect feeding on wrapper and head leaves with head having numerous feeding scars, over 30% of leaf area eaten.