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Agricultural News


White Wheat Heads Across Panhandle Give Away Fusarium Root Rot Issues in Northwest Oklahoma

Thu, 31 May 2018 09:56:52 CDT

White Wheat Heads Across Panhandle Give Away Fusarium Root Rot Issues in Northwest Oklahoma Oklahoma State University Extension Plant Pathologist Dr. Bob Hunger, released this week his latest wheat disease report for Oklahoma. His observations from travelling across the state this past week are recorded in his statement below.


"Wednesday through Friday (May 23-25) of last week, I was in western Oklahoma (Clinton area) and at field days in the panhandle at Goodwell and Hooker (Texas County), Keyes (Cimarron County) and Balko (Beaver County). The only disease observed of significance was indicated by white heads in fields. Often this was the result of Fusarium (dryland) root rot as reported in the last update (May 17, 2018). In fields showing this root rot, the white heads and white tillers were scattered across the field with an incidence ranging from low to moderate (Figure 1). Other fields in the panhandle exhibited large areas of not just white heads and tillers, but also white secondary tillers that had not headed. In these fields, some root rot was found but Dr. David Marburger (OkSU Small Grains Extension Specialist) and I believe that many of the white tillers/secondary tillers were the result of drought, freeze, or a combination of both. Often such tillers showed clean lower stems with no indication of root rot. We believe these secondary tillers were completely white without heading because they were sloughed off as a result of the stress from drought, freeze, or a combination of both. We suspect that more of these whiteheads will show in the coming week in northwestern OK and the panhandle, but the wheat crop is quickly turning and the whiteheads may not be as evident.


"This likely is the last update I will be sending out this season as harvest in the southern half of Oklahoma has started with the crop quickly maturing in the northern half."



Pictured above, Hunger describes the images from left to right, as White heads of wheat due to root rot. Typically the white heads are scattered in a field and can range from a low to high incidence. Notice in the center photo just a few tillers of an individual plant are affected. (Credit for center photo to Brad Babek, County Educator, Washita County)



   

 

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