This morning we received information that stripe rust has been confirmed in the southern panhandle of Nebraska. It was found in two fields south of Chappell, NE located in Deuel County. One field was irrigated and the other field was dryland. The irrigated wheat was in the boot stage and the dryland wheat had the flag leaf emerging. This information was provided by Drew Lyon at the Panhandle Research and Extension Center in Scottsbluff, NE.
So what does this mean for Colorado growers? If we have another round of cool, wet weather, the impact of stripe rust could be severe. We are already receiving spotty reports from the Northeast area of CO as well as western Kansas and with this new information, chances are it is in the NE part of the state. If the temperatures warm up and we start drying out, we may not see much stripe rust, but Mother Nature never was very good about letting us know her intentions. As far as we know, the stripe rust resistance in varieties such as Bill Brown, Hatcher, Hawken, Infinity CL, Snowmass, TAM 111, Thunder CL, Winterhawk, Yuma/Yumar is still holding. There is mounting evidence that the resistance in Jagger, Jagalene and derivatives of these varieties may have been broken.