Cabbage Looper Control on Broccoli, 1977

’Waltham 29’ brocoli seed was planted August 11, 1977, with a Stanhay precision planter, which planted 2 seed rows per 40-inch bed. Planting was in Laveen clay loam soil in a dry seed bed, and the crop furrow irrigated. Plants were hand thinned on September 13 to 18-inch spacing. Treatments were replicated four times in a complete randomized block. Spray applications were started September 19 and were applied at approximately weekly intervals for a total of six applications. Sprays were applied using a 2-gallon CO2-pressurized back-pack sprayer with a 2-nozzle boom. The sprayer was operated at 50-55 psiand and applied 35 gallons of spray per acre. A single hollow-cone nozzle was used per row of the young plants; as the plants became larger 2 nozzles per row were employed.