FHB Alert Blog

FHB Update from KS, 05/03/19

Wheat in southeastern and south-central Kansas is at heading stages of development. Wheat in these areas will reach the growth stages critical for Fusarium in roughly week to 5-7 days. The model is indicating moderate risk of severe disease just as we head into the most vulnerable period of growth. The risk is likely to persist or increase if these regions continue to receive frequent rainfall and extended periods of high relative humidity. Growers in southeastern and south central Kansas should be monitoring situation carefully and planning to apply a fungicide if weather conditions remain favorable.

--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 MD, 05/03/19

Wheat in the Eastern Shore of Maryland is beginning to flower or will do so in a couple of days. With yesterday’s rains, and more showers coming our way, the risk of Fusarium Head has increased significantly in this part of the state. Growers are advised to spray head scab fungicides (Prosaro/ Caramba/ Miravis-Ace) at wheat flowering (50% of the main tillers showing yellow anthers) or within 4-5 days of this stage. These fungicides do not need to be tank mixed with another product for spraying. The fungicide products should be applied at the full rate recommended by the manufacturers. Strobilurin containing fungicides should not be sprayed at this stage. Aerial application at a rate of 5 gallons per acre or ground application at 15 gallons per acre with 300-350 um droplet size is recommended. Spray nozzles should be angled at 30°-45° down from horizontal, toward the grain heads, using forward- and backward mounted nozzles or nozzles with a two directional spray, such as Twinjet nozzles. Up in the North wheat is booting, and still roughly around 2 weeks away from flowering.

--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 MD, 05/03/19

Wheat in the Eastern Shore of Maryland is beginning to flower or will do so in a couple of days. With yesterday’s rains, and more showers coming our way, the risk of Fusarium Head has increased significantly in this part of the state. Growers with wheat flowering (50% of the main tillers showing yellow anthers) are advised to spray head scab fungicides (Prosaro/ Caramba/ Miravis-Ace) at early flowering or within 4-5 days of this stage. These fungicides do not need to be tank mixed with another product for spraying. The fungicide products should be applied at the full rate recommended by the manufacturers. Strobilurin containing fungicides should not be sprayed at this stage. Aerial application at a rate of 5 gallons per acre or ground application at 15 gallons per acre with 300-350 um droplet size is recommended. Spray nozzles should be angled at 30°-45° down from horizontal, toward the grain heads, using forward- and backward mounted nozzles or nozzles with a two directional spray, such as Twinjet nozzles. Up in the North wheat is booting, and still roughly around 2 weeks away from flowering.

--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 KY, 05/02/19

Wheat fields in most of the state should now be flowering. Although current risk of Fusarium head blight is predicted to be low, rainfall events that occur over the next few days may change the risk level. Fungicides that are effective in managing Fusarium head blight and the associated mycotoxin, deoxynivalenol (DON; vomitoxin) include Caramba (BASF Corp.), Prosaro (Bayer CropScience), and Miravis Ace (Syngenta Crop Protection). In general, in university research trials, the most effective application timing for management of Fusarium head blight and DON has been Feekes 10.5.1 (beginning flowering), but applications 4-6 days after Feekes 10.5.1 also have been found to be similarly effective. Be sure to read and follow fungicide labels, including pre-harvest interval restrictions before making any fungicide applications.

--Carl Bradley, Extension Plant Pathologist, University of Kentucky

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, 05/02/19

With the exception of late maturing lines in North Alabama, wheat in Alabama is past flowering and is no longer vulnerable to Fusarium head blight. Disease risk for most of North Alabama remains low though showers may be moving through the area this coming weekend. Growers in this area are very familiar with the risk posed by this disease and have made at flowering applications of a recommended fungicide. Overall disease activity in wheat this year has been low with very little rust or glume blotch activity.

--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, 05/01/19

There is increased risk of Fusarium head blight (FHB) in some parts of Virginia, especially near the Northern Neck and Eastern Shore of Virginia. Wheat in much of the state is flowering, and if a field is in a high risk area a fungicide application is recommended. Recommended fungicides for control of FHB and DON contamination include Caramba, Prosaro, Proline, and Miravis Ace. Do not apply a strobilurin-containing fungicide after the flag leaf stage since this has the potential to increase DON concentrations in the grain. To maximize their effectiveness, fungicides for FHB and DON control should be applied at early flowering or up to one week later. Fungicides that control FHB and DON will also control foliar diseases including powdery mildew, leaf rust, stripe rust, and leaf blotch.

--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 PA, 05/01/19

Pockets of Western and Northeastern Pennsylvania show medium to high risk of infection at this time. Growers of barley in these areas should monitor crop development and plan to spray a fungicide if they are approaching heading. Caramba and Prosaro (Group 3) or Miravis Ace (Group 3 + 7), give good control of scab as well as most leaf and head diseases. They do not need to be tank mixed with another product to control these diseases. Spray nozzles should be angled at 30° down from horizontal, toward the grain heads, using forward- and backward mounted nozzles or nozzles with a two directional spray, such as Twinjet nozzles. Most wheat in the area is at this time too young to spray for scab, but scout regularly to monitor for leaf diseases and crop development.

--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 US, 05/01/19

Wheat in AR, Southern MO, TN, and Western KY is likely at or near the critical stages of growth. At this point, the forecasting model indicates that the risk of severe disease is low in most of these areas. There is a region of southern AR that appears to be a moderate or high risk, however, wheat in this area is likely past the most vulnerable growth stages. Late maturing fields may still be at risk for problems.

--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 NC, 04/30/19

Thanks to recent dry weather, scab risk is low for wheat flowering today throughout North Carolina. With little rain in the forecast, risk is likely to remain low. The susceptible stage is flowering for wheat, and heading for barley. Most North Carolina wheat has either already flowered, or is flowering now. Barley is likely past heading. Fungicides aimed at scab reduction are not recommended when scab risk is low.

--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, 04/29/19

Wheat in the Eastern Shore of Maryland has booted and should be heading out soon. Barley is already flowering there. FHB risk has slightly increased to moderate level in parts of the state over the past week. Growers here should keep an eye on the FHB risk, as crop heads and flowers here in coming weeks. Fungicides Prosaro, Caramba and Miravis-Ace should be effective in minimizing damage due to FHB in wheat, when applied at flowering. Wheat is considered to be at flowering when at least 50% of the heads of a field are beginning to show yellow anthers. Strobilurin containing fungicides should not be applied now, as they might increase the chances of DON content in the grains. Up in the northern part of the state wheat is at second node to flag leaf stage, predictably around 2-3 weeks away from flowering.

--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

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