FHB Alert Blog

FHB Update from NC, 04/21/14

Head scab risk is moderate to high in several coastal counties, including Brunswick, New Hanover, Onslow, Carteret, Pamlico, Beaufort, and Hyde. Some fields in these counties may be flowering; most fields have not headed yet. For wheat that is at or just past early flowering in these moderate- to high-risk areas, an application of Prosaro, Caramba, or Proline is recommended. Avoid strobilurins. Fungicides applied before flowering are ineffective against scab. Most of the state remains at low risk for scab, and no fungicide is needed for scab control in low-risk areas.

--Christina Cowger, Plant Pathologist, USDA-ARS and North Carolina State University

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

FHB Update from AR, 04/18/14

The most advanced wheat in Arkansas likely will be heading soon. The risk for scab has been low all season, likely because of cool temperatures. The incidence of other diseases has been at or near zero at most locations. At this time there seems to be no need to apply a fungicide. Continue to scout for diseases and pay attention to the scab forecast as your wheat enters heading stage.

--Gene Milus, Plant Pathologist, University of Arkansas

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

FHB Update from US, 04/17/14

Welcome to the Fusarium Head Blight Prediction Center. The Prediction Center displays daily risk maps for Fusarium head blight throughout the eastern half of the US. The current focus of the risk is on Southern states including LA, AL, MS, and GA where wheat is near the flowering stages of growth that are most vulnerable the disease. The risk is currently low in these areas of the country. Other areas of the country appear gray in the risk map because it is still too early to provide meaningful estimates of disease risk. Be sure to select individual states from the menu options on the left. Disease specialists in each state have the opportunity to provide commentary about the risk of disease in their area. 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

FHB Update from AL, 04/16/14

Through April 16, the scab risk level remains low. Had heavy rains statewide on April 14 and April 15 with some sleet and show in North Alabama where the wheat is in the boot stage. Foliar disease activity statewide is minimal except for scattered powdery mildew outbreaks. May see some freeze damage on wheat, which can be mistaken for scab, in the Tennessee Valley after last nights hard freeze.

--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 DE, 04/15/14

The 2014 small grains season is officially underway. Small grains are starting to pull out of a late start due to a cold Spring. Wheat ranges from Feekes 4 through Feekes 6. Cool, windy, and fairly dry weather has not been favorable for development of foliar diseases. To date I have not detected significant levels of any disease in fields or small grains variety trials. Fields will not likely be starting to enter flowering for several weeks.

--Nathan Kleczewski, Extension Specialist, University of Deleware

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

FHB Update from NC, 04/14/14

Observations from Randy Weisz, NCSU Small Grains Extension Specialist, and colleagues indicate wheat will soon be heading in southern North Carolina, from Union County east. We'll need to start monitoring scab risk in that region in the last 10 days of April. Otherwise, wheat from the Central Piedmont (e.g., Rowan Co.) east to Raleigh is about 2 to 3 nodes. Flowering is anticipated starting early May. Moving east, wheat is behind in the Coastal Plain, and farthest behind in the Tidewater.

--Christina Cowger, Plant Pathologist, USDA-ARS and North Carolina State University

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

FHB Update from KS, 04/14/14

Wheat in southern Kansas is now at the jointing stages of growth. It will be weeks before wheat reaches the flowering stages that are most vulnerable to infection by Fusarium head blight. Recent rains have brought some temporary relief from dry conditions in areas of central KS.

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

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

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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