Management of Lepidopterous Pests on Cabbage, 1990

‘Rio Verde’ cabbage seeds were incorporated into a germination mix (Pro-Mix) and direct seeded into a Rockdale soil at the University of Florida’s Tropical Research and Education Center on 7 Feb 1990. The soil was fumigated with Terr-O-Gas (75% methyl bromide, 25% chloropicrin; 246 kg/ha) and covered with white on black plastic mulch on 31 Jan. Plants were spaced 0.3 m apart within rows and 0.76 m apart between rows on 1.8 m-center beds. Fertilizer (1680 kg/ha of granular 6:12:12) was applied and incorporated into the soil on 26 Jan. Goal 2 EC was applied (0.56 kg (AI)/ha) between the beds on 3 Feb for weed control. Plants were irrigated 4 h/day using a turbo T-tape drip irrigation system (model 40) which delivered 5.0 liters of water/m of dripline/h. All treatments, with the exception of the chemical insecticide standard, Phosdrin (0.56 kg (AI)/ha), in combination with Dipel 2X (0.56 kg/ha), were biological insecticides consisting of Bacillus thuringiensis var. kurstaki. Treatments were replicated 4 times in a randomized complete block design. Treatment plots were 4 rows (2 beds) by 12.2 m long. A 3.0-m long section of nontreated plants separated replicates.