Northern Great Plains Region's blog

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

FHB Update from SD, 06/15/18

The risk for Fusarium head blight (FHB) or scab in winter wheat remains low throughout South Dakota. This is because of the dry weather conditions we are currently experiencing. A big portion of northeast part of the state is either abnormally dry or up to D2 (severe drought) drought category. Most of the winter wheat is done flowering and since the risk for scab is increased by wet and humid weather 15 days prior and during flowering, these fields have a low chance of getting FHB, should the weather conditions change. For fields not yet at flowering, growers are encouraged to keep checking on the FHB prediction tool, and plan a triazole fungicide at flowering growth stage if the risk for scab changes to moderate or high.

--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 SD, 06/06/18

Winter wheat in South Dakota ranges between flag leaf and heading. One disease that is managed after wheat heading is Fusarium head blight (FHB or scab). This disease is promoted by warm and wet weather. Currently most of the areas in the state are tending towards being dry and therefore the risk for FHB at this time is low according to the FHB risk model. Growers are encouraged to keep monitoring the weather conditions and the FHB risk tool to determine the need for applying a triazole fungicide at wheat flowering to control FHB.

--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, 07/20/17

Scab risk for susceptible varieties northeast ND is moderate to high. The northern half of the Red River Valley also is in a moderate to high risk for scab. Several fields are progressing into dough stage, yet there are several late planted wheat fields that are flowering. Pay attention to the growth stage in late planted fields and use the model to assess scab risk. With the recent rain and higher humidity projected, scab risk is likely to remain moderate to high in areas of elevated 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, 07/10/17

Most of the spring wheat and durum is headed or in the flowering stages. There are several late-planted fields that are approaching flag leaf. Currently, a moderate scab risk for susceptible varieties exists in northeast ND and areas near Grand Forks, ND. High humidity and rain are predicted for these areas in the next couple days, thus a moderate risk will likely remain. However, temperatures will climb into the 90's toward the end of this week and extend into next week. This may lower scab risk if humidity values are low.

--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 MN, 07/06/17

Growth stages are ranging from Zadocks Growth stage 50 - 80 (inflorescence emergence to early dough development) across the state state. The warmer temperatures around the July 4th holiday, combined with rain events have seen growth stages advanced rapidly. With higher temperatures fields which are close to flowering will start to flower quickly and for those that have still to apply fungicide for Fusarium head blight control, fields should be watched closely so as not to miss the optimal spray timing at early flowering. Flowering in warm temperatures will be shorter, the period lasting 3-4 days. If no anthers are visible, open up spikelets to check for either green immature anthers, or if the plant has already flowered, embryonic grain development, which will be visible roughly four days after flowering.

The high humidity and warm temperatures are ideal for FHB development at this time. The risk model is currently trending moderate to high high risk in the North Central and North Eastern part of the state for moderately susceptible varieties, and largely moderate risk in these areas for moderately resistant varieties with a few hot spots of high risk in the next 24 to 48 hours.

Field observations again indicate that there is plenty of early awn infection and inoculum present in the Northwest part of the state, and Fusarium symptoms are now being reported in Southern MN where the crop is more advanced.

--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 MN, 06/30/17

In MN temperatures have fluctuated greatly within the past few weeks. Despite this, the overall spring wheat crop looks to be doing well in terms of disease. In many areas spray applications for FHB are being contemplated at this time. The risk model is trending high risk in the Northwestern part of the state for super susceptible varieties e.g. Mayville. The two day forecasting for moderately resistant varieties is low to moderate risk . Despite this, many areas are experiencing periods of high relative humidity after storm events. Premature discolouration of awns, indicating FHB infection, is prevalent in these areas. Therefore, use of fungicide to control FHB for moderately resistant varieties should also be considered. Applications should be made at early flowering (Feekes 10.5.1). If not possible at this time, applications up to five days post-flowering have been shown to have some efficacy. Always check current labels for pre-harvest interval and other use restrictions.

--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 ND, 06/28/17

The small grain crop has headed and/or flowered in western ND and some of the small grain crop is starting to head and flower in the northern tier of the state. The greatest amount of scab risk for headed small grains is in northeast ND (Towner Co. and Cavalier Co.). Rain and thunderstorms occurred yesterday and more rain is forecasted in the upcoming days. Also, the chance of evening and morning dew will increase in the upcoming days. Therefore, scab risk may increase in portions of the state with prolonged and/or frequent periods of moisture in the past 15 days.

--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, 06/26/17

Spring wheat in SD is now at flowering. However, it has been dry and currently temperatures are low. These conditions do not favor scab development, the reason why the FHB risk tool is showing low risk for FHB throughout SD. For spring wheat just starting to head, there is a need to keep checking on this FHB risk tool until wheat is done flowering. For moderate to high risk for FHB, plan a triazole fungicide at the flowering growth stage to manage FHB.

--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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