FHB Alert Blog

FHB Update from PA, 05/06/19

Recent wet and mild weather is driving up scab risk across Pennsylvania. Keep a close eye out for anthers emerging from progressing wheat and consider your spray decisions. Sprays prior to heading do not suppress scab, but one labeled fungicide, Miravis Ace, may be applied at 50% heading. The best control with all fungicides will result from spraying at the first sign of anthers. 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.

--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 MD, 05/06/19

With the recent showers in the state the risk of Fusarium Head Blight appears to be high. In the Eastern Shore wheat is currently flowering (50% of the main tillers showing yellow anthers). Growers with their wheat flowering are advised to spray head scab fungicides (Prosaro/ Caramba/ Miravis-Ace). 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. In the Northern counties, we are still around 7-10 days 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 IL, 05/06/19

Wheat is starting to flower in parts of S Illinois, and the forecast is calling for an increase in temperatures coupled with some potential rains over the next 3-4 days in some areas. I expect that, given the amount of rain we have had over the past 3 weeks, coupled with recent weather, that we may see some elevation in FHB risk this week if the rains move through as expected. Remember- the best time to make applications is when 50% of main tillers start flowering through roughly 6 days from the start of this point. Recommended fungicides for FHB suppression include Caramba, Miravis Ace, Prosaro, and Proline. These products also will have activity against glume blotch and rusts. Symptoms of FHB will start to show up 18-24 days from the start of flowering, depending on temperatures and other factors.

--Nathan Kleczewski, Research Assistant Professor and Extension Specialist, University of Illinois

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, 05/03/19

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. The model currently indicates a large portion of IL, IN and OH are at a moderate or high risk of severe disease. Local reports from this area indicate that wheat in this area is not at flowering or early stages of grain fill growth stages that are most vulnerable to disease. Producers in these areas should monitor the weather conditions carefully. Fungicide applications may be needed to suppress disease if the risk remains high. Selecting the state of interest from the menu to the left of the map will zoom the map to show more detail and display commentary from local disease specialists.

--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 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

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