FHB Alert Blog

FHB Update from US, 04/25/18

Welcome to the Fusarium head blight prediction center. This site provides daily estimates of disease risk for many of the areas of the US where head blight is a problem. The current focus of the prediction effort is on AR, MO, TN, KY and NC. Wheat in these states are at growth stages that are most vulnerable to Fusarium infection or will likely reach these stages in the next 7 -10 days. The current risk maps indicate a low risk of disease because of dry weather in early April. The risk may increase over the next week as rain moves through some areas of the central US.

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

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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

FHB Update from PA, 04/24/18

Currently, PA and most of Delaware are at a “low” risk of scab development because it has been so cool. The exception is the lower eastern portion of Sussex County, DE which is just now starting to experience weather conditions that nudge it into "medium" risk territory. While most of the wheat in PA is too young to worry about scab right now, those of you wishing to apply a fungicide along with your growth regulator spray should scout for powdery mildew before doing so. We generally recommend only spraying for this disease if 5-10% of the fully expanded upper leaves are infected, and because it has been so cool, your wheat will probably not meet this threshold. Those of you in Delaware are closer to heading, and if you are growing barley, you may already be there. Keep a close watch on the FHB Risk Assessment Tool as warmer temperatures and humidity may push your risk higher over the next week. If you decide to spray your barley, target your Caramba or Prosaro application at heading. For wheat, wait until early flowering for your applications.

--Alyssa Collins, Extension Field Crops Pathologist, Penn State University

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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

FHB Update from NC, 04/23/18

For wheat flowering now, scab risk is low across North Carolina due to recent dry weather. Rain predicted for April 23-28 will make conditions more conducive to scab for wheat flowering in the coming 10 days. However, considering the amount of moisture predicted, risk for wheat flowering later this week and next week will likely remain low in most of North Carolina, with the likely exception being the Tidewater area. If your wheat is flowering in the next 2 weeks, monitor scab risk closely, especially if you have susceptible varieties.

Do not apply a strobilurin-containing fungicide after flag leaf stage. For scab, the most effective products are Caramba, Prosaro, and Proline. Aerial application may be profitable. For ground application, rear- and forward-facing nozzles should be angled down 30 degrees from horizontal.

--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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

FHB Update from MD, 04/20/18

Wheat in southern Maryland is either at jointing or booting stage, and should be heading out in a week or so. Even with the recent showers, the FHB risk is currently predicted to be low because of the cold temperatures so far. However, the temperatures are going to increase by next week, so growers are advised to keep an eye on the FHB risk forecasts. Up in the north in Frederick, Harford and nearby counties, plants are starting to joint, and are not at a stage prone for FHB.

--Nidhi Rawat, Small grains Pathologist, University of Maryland

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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

FHB Update from AL, 04/20/18

While moisture levels remain adequate due to periodic heavy showers, the following fronts have brought dry and unusually cool weather patterns, which are not conductive to foliar disease development. Overall, scab threat across Alabama is low and is not expected to change until the week of April 22 when several days of rain are forecast. Wheat in South and probably Central AL is past flowering and is not vulnerable to scab. Wheat in North AL has not yet flowered or is in full flower and may be vulnerable to scab early next week. Activity of other foliar diseases in North AL is very low with only some Septoria leaf spot and glume blotch being seen in breeding line trials at the Tennessee Valley Research and Extension Center. Overall, it's a low disease year in Alabama wheat.

--Austin Hagan, Extension Plant Pathologist, Auburn University

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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

FHB Update from VA, 04/19/18

Currently the wheat crop in Virginia is near flag leaf emergence, and flowering will start within a couple of weeks. As flowering begins, be sure to monitor the FHB risk in your area. Currently, most of Virginia has low risk for FHB infection. The exception is the Eastern Shore where risk is moderate to high in many areas, especially on susceptible varieties such as Shirley.

--Hillary Mehl, Extension Plant Pathologist, Virginia Tech

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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

FHB Update from NC, 04/16/18

Wheat scab risk is moderate to high for wheat flowering now in coastal NC counties. These include south Columbus, Carteret, Pamlico, east Craven, southeast Beaufort. Wheat is likely at earlier growth stages in coastal counties north of those. Risk remains low for the Coastal Plain and other regions of the state. If risk in your area is moderate to high and wheat is flowering, apply fungicide at early flowering or up to 7 days later. Do not apply a strobilurin-containing fungicide. The most effective products are Caramba, Prosaro, and Proline. Aerial application may be profitable. For ground application, rear- and forward-facing nozzles should be angled down 30 degrees from horizontal.

--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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

FHB Update from OK, 04/13/18

Wheat in central Oklahoma was reported at growth stages 8-9 (flag leaf emerging to flag leaf fully emerged). In northern Oklahoma, wheat was extremely variable with growth stages from 2-8 (tillering to flag leaf emerging) being reported. Powdery mildew continued to be the primary wheat foliar disease this past week in Oklahoma. Around Stillwater, I have seen powdery mildew on the lower and mid-leaves with severities reaching 90% on the lower leaves. A preponderance of powdery mildew on lower to mid leaves also was indicated across Oklahoma by reporting from Extension Educators. There was one report of stripe rust in south central Oklahoma from near Ardmore, OK. This report indicated both active stripe rust and the dormant (telial) spore stage of stripe rust. The only other observation this week has been “spots” of barley yellow dwarf as reported last week. However, after the recent freeze events, these barley yellow dwarf “spots” are more difficult to discern because there is widespread burning of leaf tips from the freeze, which has a masking effect.

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

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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

FHB Update from VA, 04/12/18

This is the first FHB update for Virginia in 2018. Currently the wheat crop is in the jointing stages, and we are several weeks away from flowering. Currently the risk is low for most areas of the state except for the Eastern Shore. These conditions may change as the wheat crop approaches flowering, so be sure to continue monitoring the risk tool. Weekly updates will be provided until wheat in the state has completed flowering.

--Hillary Mehl, Extension Plant Pathologist, Virginia Tech

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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

FHB Update from US, 04/11/18

Welcome to the Fusarium head blight prediction center. This site provides daily estimates of disease risk for many of the areas of the US where head blight is a problem. The current focus of the prediction effort is on southern states including LA, MS, AL and GA. Wheat in northern portions of these states will reach growth stages that are most vulnerable to Fusarium infection in the next 7 -10 days. Some parts of this region were at moderate risk this past week, but the risk has diminished over the last few days. You can see more detail about an area by selecting a state from the menu to the left of the map.

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

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

For the latest news and updates from the U.S. Wheat & Barley Scab Initiative, go to https://www.scabusa.org

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