Control of Cabbage Looper, Diamondback Moth, and Imported Cabbageworm on Cabbage with Mi-Crobial Insecticides, 1997

‘Bravo’ cabbage were planted in 35-ft-long 1-row plots on 19 Aug. Plants were spaced 22 inches apart in the row i 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 j 30 psi. Treatments were applied on 8, 15, and 22 Sep and 1, 7 Oct. Foliage injury was rated on 1-6 scale as follows: 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 or outer leaves with no head damage, 2-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) j considerable insect feeding on wrapper and head leaves with head having numerous feeding scars, over 30% of leaf area eaten.