FHB Alert Blog

FHB Update from SD, 07/16/18

Most of the spring wheat is past flowering but for late planted or late maturing spring wheat varieties, flowering may still be going on. These fields are at risk for Fusarium head blight (FHB or scab). The FHB prediction tool is showing moderate to high risk for FHB mainly for the eastern-most counties and a few southeast areas. Spring wheat in these areas that is at flowering should be protected from FHB using a triazole (FRAC group 3) fungicide. For fields that were not treated due to wet conditions, a fungicide can still be applied within 6 days post flowering, however, the most efficacious timing for FHB management is when 50% of the wheat plants are at flowering.

--Emmanuel Byamukama, Extension Plant Pathologist , South Dakota 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 ND, 07/05/18

Spring wheat and durum growth stages vary across the state. Some fields are entering early dough development, while later planted fields are in the boot stage. For susceptible varieties that are entering flowering stages, several pockets of moderate to high risk exist in the state. Risk will likely increase on the eastern half of North Dakota in the next few days. Continue to monitor the growth stage of fields that are entering the flowering stages of development and apply an effective triazole (FRAC 3) fungicide when needed.

--Andrew Friskop, Cereal Extension Pathologist, NDSU Department of Plant Pathology

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 SD, 07/05/18

The risk for Fusarium head blight (FHB, scab) remains high for the most of the eastern half of the state and some parts of north and southwest SD. Spring wheat that is at flowering or just done flowering may benefit from a triazole fungicide application. Although the most effective timing is at flowering (50% of the plants flowering), rainy weather conditions may prevent fungicide spraying at this growth stage. Research shows that there is still protection from FHB and DON within 6 days after flowering, therefore a fungicide can still be applied within this window.

--Emmanuel Byamukama, Extension Plant Pathologist , South Dakota 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 MN, 07/03/18

FHB has been observed in winter wheat in the southern portion of the state. Many areas have had high rainfall with frequent storm activity. This is contributing to high relative humidity and high risk of FHB as well as other fungal diseases in these areas. The risk map is currently trending high risk for susceptible and moderately susceptible spring wheat varieties across the southern half of the state with some high risk areas also located in the North central area of the state. Awn infections have been observed in commercial fields of spring wheat in the Northwest of the state. Treatment with fungicide should be considered when the majority of spikes have reached early flowering. However, fungicide applications made 4- 7 days after first flowering can still have some efficacy , if conditions have made spraying at early flowering impossible. However, remember to check labels for current use restrictions and pre-harvest intervals which must not be exceeded.

--Madeleine Smith, Plant Pathologist, University of Minnesota

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, 07/02/18

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 ND, SD and MN this week. Wheat in these states are at growth stages that are most vulnerable to Fusarium infection or will likely reach these stages in the next week. The current risk maps indicate a moderate to high risk of disease for some of these areas. Growers in the high-risk areas should consult with local extension specialists or other advisors regarding the need for fungicide applications to protect the crop.

--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 SD, 06/27/18

Spring wheat is at heading and some of the fields are at flowering growth stage. Current weather conditions are conducive for Fusarium head blight or scab to develop for the majority of the state. The FHB prediction tool is a showing high risk for FHB in susceptible cultivars for more than 1/2 of the state. A triazole fungicide applied at flowering is advisable to protect wheat from FHB and DON.

--Emmanuel Byamukama, Extension Plant Pathologist , South Dakota 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 ND, 06/27/18

Scab risk has increased for susceptible varieties that are headed or are in the flowering stages of development. Currently, there are several areas of moderate to high risk across much of the state. Scab risk for moderately susceptible varieties is lower, however a pocket of moderate risk exists in southwest North Dakota. I am expecting scab risk in the state to maintain or even get higher in the next few days. Several factors that will contribute to a higher risk include wheat planted on corn residue, rain, prolonged dew periods (into the afternoon hours), and fog. Continue to monitor the growth stage in the field, record field conditions, and apply a timely fungicide.

--Andrew Friskop, Cereal Extension Pathologist, NDSU Department of Plant Pathology

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 ND, 06/25/18

Scab risk for susceptible varieties in North Dakota will likely increase in the coming days. In the next three days, scab risk for susceptible varieties will be moderate to high for a large portion of ND with the highest risk in SW and SE ND. Double check the level of susceptibility in the wheat variety used, monitor growth stage in and plan on using a labeled triazole for a fungicide application at early flowering in wheat or at full head in barley, especially in areas of moderate to high scab risk.

--Andrew Friskop, Cereal Extension Pathologist, NDSU Department of Plant Pathology

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 ND, 06/18/18

The few winter wheat acres in North Dakota are headed out or in the flowering stages. Some of the earliest planted spring wheat has headed and will likely enter early flowering stages in the next 7 days. Presently, scab risk for susceptible varieties is low with a few pockets of moderate risk (northeast ND). Rain and high humidity from this past weekend will likely elevate scab risk in southeast ND. Another chance of sporadic rain may occur towards the end of the week, which may also contribute to elevating scab risk. Continue to monitor the growth stages in the field, keep note of field conditions (ie: morning dews), and apply a FRAC 3/DMI/Triazole fungicide at early flowering when warranted.

--Andrew Friskop, Cereal Extension Pathologist, NDSU Department of Plant Pathology

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 SD, 06/18/18

A few areas in the south central and the east are showing some moderate to high risk for Fusarium head blight (FHB). If winter wheat is starting to flower or just got done flowering and you are in these areas, a triazole fungicide is recommended to control FHB. These areas got a few showers in the last few days hence the change in the FHB risk. Growers in other areas should keep checking on this tool until winter wheat is done flowering.

--Emmanuel Byamukama, Extension Plant Pathologist , South Dakota 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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