Evaluation of Ac 303630 (Pirate) for Tobacco Budworm Control in Leflore Co., Mississippi, 1992:

Pretreatment assessment of a tobacco budworm infestation to determine infestation uniformity, was made by randomly scouting 25 terminals and 25 squares in each of 21 randomly chosen plots. Plots were 12 m long by 4 rows wide with 0.96 m centers. The test was applied under completely calm conditions at ca. 29°C between 6:00 and 9:00 p.m. on 3 Aug. Application of insecticides was made in a replicated (4 replications) RCB design by use of a high clearance spray tractor equipped with a compressed air spray system at 6.4 km/h and at a volumetric application rate of 46.7 liters/ha. A boom with TX4 hollow cone nozzles spaced at 48 cm was used at a height of 45 cm above the terminals of the plants. Two rows were sprayed with 5 nozzles so that the middles between border rows were also sprayed. Posttreatment evaluation was made on 6 Aug by examining 25 terminals and 100 squares in the upper 1/3 of the plants in the center of each plot. Data were tested for homogeneity of variance prior to analysis.