Weed Resistance to Dicamba, 2,4-D and Glufosinate on the Rise
There are zombies lurking under the canopies of crop fields this summer, particularly soybean fields.
Herbicide-resistant Palmer amaranth and waterhemp weed escapes are laying low after dicamba and 2,4-D herbicide applications right now. But they will start rising again soon.
"With auxin herbicides, there's a tendency to lay that weed down, but if they don't completely kill it, in around 14 days, that weed turns and starts coming back up," University of Arkansas weed scientist Jason Norsworthy explained. "And depending on the size of the crop, it might take another 14 days to get above the canopy."
Weed resistance to post-emergence herbicides such as dicamba, 2,4-D and glufosinate (Liberty) is on the rise this summer, weed scientists told DTN. In the Midwest, waterhemp escapes are most often troubling growers, while in the South, Palmer amaranth is shaking off herbicide applications with increasing ease.
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Herbicide-resistant Palmer amaranth and waterhemp weed escapes are laying low after dicamba and 2,4-D herbicide applications right now. But they will start rising again soon.
"With auxin herbicides, there's a tendency to lay that weed down, but if they don't completely kill it, in around 14 days, that weed turns and starts coming back up," University of Arkansas weed scientist Jason Norsworthy explained. "And depending on the size of the crop, it might take another 14 days to get above the canopy."
Weed resistance to post-emergence herbicides such as dicamba, 2,4-D and glufosinate (Liberty) is on the rise this summer, weed scientists told DTN. In the Midwest, waterhemp escapes are most often troubling growers, while in the South, Palmer amaranth is shaking off herbicide applications with increasing ease.
Click Here to read more.