Abstract
Abstract Potatoes were planted on 12 Apr ’84, in a Sassafras sandy loam field. Plots were 20 ft long, 5 ft wide and replicated 4 times in a randomized complete block design; a guard row buffered each treated row. Treatments were applied with a self-propelled, high-clearance sprayer with 1 drop nozzle on each side of the row and 1 over the center calibrated to deliver 83 gal/acre at 200 psi. Treatments were applied on 13, 21, 29 Jim and 6 Jul. Plant percent defoliation was recorded on 26 Jun, 5 and 9 Jul. Number of Colorado potato beetle CPB larvae per 5 hills were recorded on 22 Jun. Number of stems/10 hills damaged by European corn borers (ECB) were recorded on 16 Jul. Yields (cwt/A) were recorded on 31 Jul. Plots were irrigated when moisture was below normal.
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