Glyphosate drift on wheat
Bob ScottSymptoms of glyphosate drift on winter wheat. Glyphosate drift from burndown fields to wheat is starting to show up in areas around Arkansas.
The photo (right) shows typical symptoms of wheat that likely recieved a drift rate of glyphosate sometime after panical initiation. Note the short flag leaf and the chlorotic (yellowish to white) bleaching at the base of the flag leaf.
Malformed or even blank seedheads are likely to follow. Just like in rice this injury can result in severe yield loss. The necrotic spots seen in the picture are most likely due to a tank-mix partner that causes more contact type injury symptoms such as Aim, gramoxone, Sharpen or Valor. This injury is often more visual, but in the end causes less yield loss than the glyphosate.
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