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‘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 27 Dec 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 19 Dec. Plants were spaced 0.3 m apart within rows and 0.76 m apart between row on 1.8 m-center beds. Fertilizer (1680 kg/ha of granular 6:12:12) was applied and incorporated into the soil on 18 Dec. Goal 2 EC was applied (.56 kg (AI)/ha) between the beds on 20 Dec for week control. Plants were irrigated 4 h/day using a turbo T-tape irrigation system (model 40) which delivered 5.0 liters of water/m of dripline/h. Fourteen insecticide treatments and a nontreated check were compared. Treatments were: biweekly applications of CME 13406 (0.033 kg (AI)/ha) until heading and then judiciously thereafter; the above in combination with Butacide (10:1; Butacide:CME 13406 AI); the above in combination with Cutlass WP (2.2 kg/ha); biweekly applications of the above rotated on alternate weeks with applications of Cutlass WP (2.2 kg/ha); weekly applications of Cutlass WP (2.2 kg/ha); weekly applications of Javelin WG (1.1 kg/ha); weekly applications of Dipel 2X (1.1 kg/ha); three applications of Biosafe Steinernema carpocapsae (Filipjev) strain All (3.7 and 7.4 billion infective juveniles/ha); three applications of S. carpocapsae (7.4 billion infective juveniles/ha) and six application of Cutlass WP (2.2 kg/ha) when S. carpocapsae was not applied; judicious applications of RH-9999 20 WP (0.11 or 0.22 kg (AI)/ha) rotated with Cutlass WP (2.2 kg/ha) on dates when RH-9999 was not applied; judicious applications of Margosan-0 (0.3% Al) 0.22 kg (AI)/ha) as above; judicious applications of MK-244 0.16 EC (0.011 kg (AI)/ha) as above; Phosdrin 4 EC (0.56 kg (AI)/ha) in combination with Cutlass WP (2.2 kg/ha); and a nontreated check. All treatments, except S. carpocapsae were applied with Bond (2.3 liters/ha). CME 13406, the above in combination with Butacide, and the above in combination with Cutlass WP were applied on four dates: 31 Jan, 14 Feb, 1 and 14 Mar. |
