1 October 2000 Weed Suppression for Weed Management in Corn (Zea mays) and Soybean (Glycine max) Production Systems
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Abstract: Reduced herbicide inputs can diminish pesticide movement into water supplies, enhancing environmental quality. A 3-yr study was conducted to evaluate the efficacy and economic viability of reducing herbicide inputs by using ultra-low rates (ULRs), consisting of one-eighth the normal use rates of nicosulfuron plus thifensulfuron, delayed planting (DP), or both in corn and soybean. We compared the ULR treatment at the assigned cost of $12.35/ha with three other traditional types of weed management systems in both chisel plow and no-till production schemes. The ULR weed management system suppressed weeds enough to allow economical soybean production all 3 yr of the study, but this system proved viable only during the wettest year for corn. DP was economically competitive with the best systems in both crops under chisel-plowed tillage only in the driest year of the study.

Nomenclature: Nicosulfuron; thifensulfuron; corn, Zea mays L. ‘Pioneer 3417’; soybean, Glycine max L. Merr. ‘Williams 82’.

Additional index words: Delayed planting, drought, environment, low-rate input, no-till, tillage.

Abbreviations: DP, delayed planting; HI, high input; POST, postemergence; PPI, preplant incorporated; ULR, ultra-low rate.

DAVID M. ALM, LOYD M. WAX, and EDWARD W. STOLLER "Weed Suppression for Weed Management in Corn (Zea mays) and Soybean (Glycine max) Production Systems," Weed Technology 14(4), 713-717, (1 October 2000). https://doi.org/10.1614/0890-037X(2000)014[0713:WSFWMI]2.0.CO;2
Published: 1 October 2000
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