FHB Alert Blog

FHB Update from OK, 04/10/14

Wheat around Stillwater is mostly at GS 7 (2 nodes detectable). In a few places the flag leaf has emerged but only in one field. I still have not received reports of significant foliar diseases in Oklahoma, which is not surprising given the dry conditions. Around Stillwater I have seen some powdery mildew on low foliage in scattered spots. I and my technician Brian Olson also found tan spot in a no-till field, but only on low foliage and not severe. The one find of a different disease that is concerning was wheat streak mosaic (WSM) in Dr. Jeff Edward’s variety trial in Kay County near Kildare. Visiting the trial on April 2nd, yellowing and streaking were present in all varieties but some were much worse than others. I was not thinking about WSM at the time, but 5 samples I brought back to the lab all tested positive for the virus that causes WSM, so I believe that is what is present. For more information on WSM and other mite-tansmitted viruses, go to http://osufacts.okstate.edu and access EPP-7328

On a trip today to northern Oklahoma and over to Lahoma in north central Oklahoma, I saw some good and some bad wheat that ranged from GS 6 to GS 7 (or close to it). However, all the wheat seemed short to me – some not much more than 10-12 inches tall. In northwestern Oklahoma, Rick Kochenower (Area Res & Extn Agron Spclt) indicated, “I see a lot of dryland wheat dying but not from disease.” He said that wheat was just starting to tiller. In southern/central/southwestern Oklahoma, Mark Gregory (Area Extn Agron Spclt) reported that today he was in wheat towards the eastern side of the district and saw no diseases; also that the wheat furthest along had flag leaves fully extended (GS 9). Gary Strickland (Extn Educator, Jackson County – southwestern OK) indicated wheat in his area was in the flag leaf stage – anywhere from flag leaf just emerging to fully-emerged. Drought is the problem; no rust, powdery mildew or other diseases, but brown wheat mites have exploded.

--Bob Hunger, Extension Plant Pathologist, Oklahoma State University

For more details, go to the FHB Risk assessment tool at http://www.wheatscab.psu.edu

FHB Update from AL, 04/10/14

Wheat is flowering in the southern third of Alabama, an area that received in excess of 4 inches of rainfall earlier this week. So far, disease activity in wheat in this area was limited to light powdery mildew within the past month. Little of any rust or Septoria diseases have been observed. Winter weather was exceptionally cold but seasonably wet statewide.

--Austin Hagan, Extension Plant Pathologist, Auburn University

For more details, go to the FHB Risk assessment tool at http://www.wheatscab.psu.edu

FHB Update from US, 04/08/14

Welcome to the Fusarium Head Blight Prediction Center. The Prediction Center resumed activity for the 2014 growing season during the first week of April, and is now displaying risk maps for Fusarium head blight daily. The current focus of the risk is on states in the south including LA, AL, MS, and GA where wheat is approaching the flowering stages of growth that are most vulnerable the disease. Other areas of the country appear gray in the risk map because it is still too early to provide meaningful estimates of disease risk. Disease specialists will begin providing commentary about the risk of disease in their area soon. You can have this commentary sent to you electronically by the FHB Alert System. To learn more about the FHB Alerts please visit US Wheat and Barley Scab Initiative webpage at: http://scabusa.org/fhb_alerts.

--Erick DeWolf, Extension Plant Pathologist, Kansas State University

For more details, go to the FHB Risk assessment tool at http://www.wheatscab.psu.edu


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