Soybean (Glycine max) Tolerance to Timing Applications of Pyroxasulfone, Flumioxazin, and Pyroxasulfone plus Flumioxazin

作者：McNaughton Kristen E^*; Shropshire Christy; Robinson Darren E; Sikkema Peter H

来源：Weed Technology, 2014, 28(3): 494-500.

DOI：10.1614/WT-D-14-00016.1

• Postemergence (POST)
• preemergence (PRE)
• preplant (PP)
• preplant incorporated (PPI)

Four field studies were conducted over a 3-yr period (2011 to 2013) to determine the tolerance of four soybean cultivars to pyroxasulfone (89 and 178 g ai ha(-1)), flumioxazin (71 and 142 g ai ha(-1)), and pyroxasulfone flumioxazin (160 and 320 g ai ha(-1)) applied either preplant incorporated (PPI), PRE, or at the soybean cotyledon stage (COT). When pyroxasulfone + flumioxazin was applied at 160 and 320 g ai ha(-1), at the cotyledon stage soybean yield was decreased by 9 and 14%, respectively. The only other treatment that decreased soybean yield was pyroxasulfone (178 g ai ha(-1)) applied PPI; yield was decreased by 6% despite minimal injury and dry biomass reductions observed during the season. Soybean tolerance to pyroxasulfone or flumioxazin applied alone was generally similar and injury was less than with pyroxasulfone + flumioxazin. Similarly, herbicides applied PPI and PRE were less injurious to soybean than the COT timing. Results suggest that soybean is tolerant to PPI and PRE applications of pyroxasulfone + flumioxazin but COT applications should be avoided.

• 出版日期2014-9