Thirty nine percent (39%) of Winter wheat in South Dakota has headed as of
June 16. The risk for Fusarium head blight is currently predicted to be low
for the majority of the state with a few spotty areas in the central part of
the state having moderate risk. The predicted risk for the next 72 hours is
low for the entire state.

–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

The latest maturing wheat fields in MI are currently flowering. A fungicide application should be considered for the Thumb and Northeast regions, particularly white wheat varieties grown within several miles of Lake Huron.  The arrival of leaf diseases should also weigh on the decision of whether or not to treat. Currently, Septoria leaf spot, powdery mildew and striped rust are beginning to appear on susceptible varieties across much of MI.

–Martin Nagelkirk, Extension Educator, Michigan State University

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

The focus of the FHB prediction models has transitioned north into NY, MI and WI where wheat has been flowering this past week. An area of moderate and high risk has emerged in NY this week and growers in this area should
carefully monitor conditions in their fields. Be sure to “zoom in” to NY for more commentary from local disease experts.

–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 any New York grower whose winter wheat or barley is in the early stages of flowering, please note that the Fusarium Risk Assessment Tool (http://www.wheatscab.psu.edu/) is now projecting a moderate or even severe risk of a Fusarium head blight (FHB) epidemic in many areas of the state.  The application window in which reasonable FHB suppression can be expected from an application of Caramba, Prosaro, or Proline fungicide only extends to 5-6 days from the beginning of flowering (Feekes 10.5 in barley and Feekes 10.5.1 in wheat). Flowering is completed in most winter cereals in New York. Attention now shifts to assessing the risk of FHB in spring wheat and barley as these crops approach heading and flowering in the weeks ahead.

–Gary Bergstrom, Extension Plant Pathologist, Cornell University

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

Winter wheat was scouted in in variety trial at Janesville, Wisconsin on June 11, 2013. Most of the wheat varieties have flowered or are in full flower at this location in Southern Wisconsin. One wheat head with Fusarium head blight was noted in this trial, which is very early. Stripe rust was also moderate in some varieties in Janesville. Wheat in the Arlington region began flowering in most varieties on Monday. Wheat is nearly ready to flower at the Chilton variety trial. Growers and consultants should monitor the head scab prediction center as flower progresses into the south central and central regions of the state. The risk for FHB is currently moderate to high in the west central area of the state. If wheat is flowering in these areas a fungicide application is recommended. DO NOT use fungicides that contain strobilurin fungicides (FRAC 11) for control of head scab, as increased risk for DON (deoxynivalenol) can result. A triazole fungicide such as Prosaro, Caramba, or similar during the onset of flowering to 3-5 days after will be most effective.

–Damon Smith, Extension Plant Pathologist, University of Wisconsin

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

Although some winter wheat fields have yet to initiate flowering, the majority of the New York crop began to flower over the past several days.  The application window in which reasonable FHB suppression can be expected from an application of Caramba, Prosaro, or Proline fungicide only extends to 5-6 days from the beginning of flowering (Feekes 10.5 in barley and Feekes 10.5.1 in wheat). So spray decisions should be completed soon. The Fusarium Risk Assessment Tool (http://www.wheatscab.psu.edu/) has consistently projected a low risk of FHB infection through the flowering period in most portions of the state and continues to project low risk into the currently rainy but unseasonably cool period. Overall, foliar diseases have been of low severity. The first signs of leaf rust were observed this week and fungal leaf blotches are beginning to be found on leaves in the upper canopy; powdery mildew activity has resumed in some susceptible varieties.

–Gary Bergstrom, Extension Plant Pathologist, Cornell University

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

The wheat in Kansas is now mostly past the flowering stages of growth in central and eastern KS where FHB is most likely to occur. A few areas of moderate risk persist in the Southeast, but wheat in this area should be in the dough stages of kernel development. I did note a trace of FHB in Northeast KS this week. I am not expecting severe disease in this area, but farmers should monitor their fields for signs of disease. The wheat in Northeast KS is past growth stages when fungicides could be applied.

–Erick DeWolf, Extension Plant Pathologist, Kansas State University

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

The focus of the FHB prediction tools is now in NE, OH, and PA. The current risk of disease appears low in these states but be sure to select these states to view the commentary from disease specialists in these states.

–Erick DeWolf, Extension Plant Pathologist, Kansas State University

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

Wheat is being harvested in southwestern OK.  Wheat around Stillwater is typically at medium dough with very little green leaf tissue left in the leaves. Stems are still mostly green but also beginning to fade.  All of the wheat I looked at on Monday had 3 plump kernels/mesh. I’m confident that wheat in Oklahoma is past the window to be infected with Fusarium as even the wheat in the panhandle is past flowering.

–Bob Hunger, Extension Plant Pathologist, Oklahoma State University

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

The KY FHB situation is this: West of I-65, the FHB levels are mostly low (single digits incidence), with an occasional field of 20-50% incidence for fields that flowered during a somewhat favorable window in early May. East of I-65, there is considerably more FHB as was predicted by the models.  Fungicides seemed to perform about as well as expected in most fields, but in some cases, application conditions were suboptimal, and this resulted in less than desirable performance. Recent storms has resulted in a fair amount of lodging in many fields across the state. Nodorum leaf and glume blotch is on the rise in many fields that were treated with a fungicide before anthesis. Rust levels are low.

–Don Hershman, Extension Plant Pathologist, University of Kentucky

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