Efficacy and Economics of Cultivation for Weed Control in Potato (Solanum tuberosum)

摘要

A 3-year study was conducted in irrigated potato to compare weed control efficacy and economics of hilling plus one or two cultivations with the standard treatment of hilling plus a preemergence application of pendimethalin plus metribuzin. Trials were conducted under both weedy and weed-free conditions. Common lambsquarters and redroot pigweed were present in weedy treat- ments each year; significant populations of hairy nightshade and green foxtail also were present one year. When week population were low or moderate (＜45 plants/m~2), total weed biomass in the hilling plus one cultivation treatment was reduced 98 to 99/100 relative to the weedy control, and U. S. No.1 tuber yields were equal to the standard treatment.