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Powdery Mildew in Wheat


Yesterday I visited some fields that had some powdery mildew low in the canopy of our wheat crops.  This is in large part due to the high humidity and cooler temperatures that we are experiencing.  It is not to the point of causing economic damage but we will keep an eye on the situation.  We typically don’t treat our fields for powdery mildew this early in the season but may treat if the fungus is widespread and covering the uppermost leaves in the canopy.  The following chart shows the susceptibility of several popular wheat varieties in our area.  The chart can be used to help determine at what point you choose to treat the powdery mildew.  A variety like AGS 2060 with a poor rating for powdery mildew resistance would be treated sooner than AGS 2026 that has a good resistance rating.

Wheat Variety Characteristics 2013


Scouting is still the best way to understand the needs of your wheat crop.  If you have questions or concerns about the conditions facing your crop, call your local county extension agent.