Agricultural News
Barley Yellow Dwarf is Being Seen in Limited Amounts in northern Oklahoma
Fri, 06 May 2011 13:17:40 CDT
According to OSU Plant Pathologist Dr. Bob Hunger- disease issues have been very secondary in the minds of Oklahoma producers in 2011. Dr. Hunger reports "A trip yesterday to central Oklahoma (El Reno area) then to Kingfisher and Marshal (west of Stillwater) confirmed that barley yellow dwarf is the most prevalent disease this year in Oklahoma. I saw very little leaf rust at any of these locations. Powdery mildew, although present, was definitely in the "shut-down" mode. Some fields and trials had what appeared to be damage from freeze and/or drought. At Lahoma (west of Enid), Dr. Brett Carver (OSU Wheat Breeder/Geneticist) reported seeing some leaf rust but still at low levels, and also found a few isolated pockets of stripe rust. In these areas and at Stillwater, wheat is mostly at the milk to soft dough stage.
Around Stillwater where more moisture has been received, leaf rust is starting to increase (especially on susceptible varieties). Dr. Art Klatt (OSU Wheat Breeder/Geneticist) reported seeing active and severe powdery mildew, and increasing levels of leaf rust (20-30S range) on his trial planted in a bottom area. Similarly, leaf rust is increasing in the variety-demonstration trial planted at Stillwater, and in a fungicide trial.
Samples continue to come into the Diagnostic Lab that test positive for various combinations of wheat streak mosaic virus, high plains virus, Triticum mosaic virus, and BYDVs. Nearly all of these samples are from northwestern OK or the panhandle.
The picture here is of leaf rust found LAST YEAR in Oklahoma County- this is something that has been rare in Oklahoma this season.
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