Insect Control in Late Snap Bean, 1981

‘Spurt’ snap beans were seeded Jul 20 to a field of Sassafras sandy loam. Plots consisted of a single row of beans 25 ft long and 5 ft wide; a guard row buffered each treated row. Treatments were replicated 4 times in a randomized complete block design. Soil treatments were applied in-furrow at planting time. Foliar treatments were applied Sep 3 and Sep 8 with a tractor-mounted boom sprayer with 1 drop nozzle on each side of the row and 1 over the center calibrated to deliver 85 gal/acre at 250 psi. Categories for the foliage injury ratings are as follows: (0) no damage; (1) slight damage, 10% defoliation; (2) moderate damage, 25% defoliation; (3) heavy damage, 50% defoliation; (4) severe damage, 75% defoliation; and (5) defoliated. Plots were irrigated when moisture was below normal. Yield data were taken on Sep 22.