Taking stand counts at our Xyway plot – Great looking field of corn!
The goal of this study is to determine corn’s response to an at-plant soil application of flutriafol (Xyway™) fungicide. Information from this trial will be used to improve corn disease management recommendations for growers throughout the state.
Fusarium molds that produce DON often develop under wet weather conditions. This particular mold initially enters plants through silks or wounds, and cool, wet conditions during the silking stage promotes spore production, increasing the inoculum load that can potentially infect more plants. Infections by the fungal species F. graminearum result in the development of Gibberella ear and stalk rots. Corn from fields with this disease issue may need to be tested for potential contamination.
The goal of this Statewide research project is to develop a prediction model that will allow producers to take corrective action based upon a weather prediction model to prevent plant infections.
40 of these research stations are scattered throughout West-Central Ohio.
Fusarium molds that produce DON often develop under wet weather conditions. This particular mold initially enters plants through silks or wounds, and cool, wet conditions during the silking stage promotes spore production, increasing the inoculum load that can potentially infect more plants. Infections by the fungal species F. graminearum result in the development of Gibberella ear and stalk rots. Corn from fields with this disease issue may need to be tested for potential contamination.
The goal of this Statewide research project is to develop a prediction model that will allow producers to take corrective action based upon a weather prediction model to prevent plant infections.
40 of these research stations are scattered throughout West-Central Ohio.
Fusarium molds that produce DON often develop under wet weather conditions. This particular mold initially enters plants through silks or wounds, and cool, wet conditions during the silking stage promotes spore production, increasing the inoculum load that can potentially infect more plants. Infections by the fungal species F. graminearum result in the development of Gibberella ear and stalk rots. Corn from fields with this disease issue may need to be tested for potential contamination.
The goal of this Statewide research project is to develop a prediction model that will allow producers to take corrective action based upon a weather prediction model to prevent plant infections.
40 of these research stations are scattered throughout West-Central Ohio.
Fusarium molds that produce DON often develop under wet weather conditions. This particular mold initially enters plants through silks or wounds, and cool, wet conditions during the silking stage promotes spore production, increasing the inoculum load that can potentially infect more plants. Infections by the fungal species F. graminearum result in the development of Gibberella ear and stalk rots. Corn from fields with this disease issue may need to be tested for potential contamination.
The goal of this Statewide research project is to develop a prediction model that will allow producers to take corrective action based upon a weather prediction model to prevent plant infections.
40 of these research stations are scattered throughout West-Central Ohio.
By: Dr. Pierce Paul, OSU Extension
The wheat crop in Ohio is now between early boot (Feekes 10, in the south) and approaching Feekes 8 (flag leaf emergence) in northern counties. Cooler-than-usual conditions over the last few weeks have slowed the crop down considerably, but as temperatures increase, the crop will advance through several growth stages over a relatively short period. Cool conditions have also kept foliar diseases in check, but Septoria, and to a lesser extent, powdery mildew are still showing up in some fields. Septoria tritici leaf spot is favored by cool, wet conditions similar to those experienced over the last several weeks. It usually shows up first on the lower leaves as yellowish flecks that later develop into irregularly-shaped, brownish-gray lesions, with easily-seen dark-brown to black spots (called pycnidia) in the center. Cool temperatures and high relative humidity are also required for the development of powdery mildew. Typical symptoms of powdery mildew are whitish fungal growth (pustules) on the surface of leaves and stems. If the variety is susceptible and conditions continue to be favorable, a fungicide application may be warranted to prevent both diseases from reaching the flag leaf before grain-fill.
Septoria tritici leaf spot on wheat – note the black dots (pycnidia) inside the lesion.
Most of the fungicides commonly used on wheat are rated as very good or excellent against Septoria and good or very good against powdery mildew. See the attached chart for fungicide options and efficacy. Remember,
Powdery mildew on wheat leaf – as the name suggests, note the powdery, white pustules.
always read and follow the labels when making an application. For both diseases, a single application between Feekes 8 and Feekes 10 would be sufficient to protect the flag leaf and minimize yield loss. However, applications made at these early growth stages will not provide adequate control of late-season diseases like head scab and Stagonospora glume blotch. So, you should scout fields before making your fungicide application decisions. If powder mildew and Septoria levels are low as the crop approaches heading (Feekes 10.5), you may be better off waiting to treat fields at anthesis (Feekes), as this will help to suppress head scab, which is still the most damaging and important disease of wheat in Ohio, while at the same time provide very good control of Septoria, powdery mildew, and late-season diseases such as Stagonospora and rust.
OK, Mother Nature is not cooperating which means we can’t talk about corn and bean planting so let’s talk about the crop we do have growing – Wheat
Source: K-State University
Knowing what growth stage your wheat crop is at is essential for nitrogen, herbicide and possibly fungicide applications. Most of the wheat I have seen in the county so far is between Feekes 5 and Feekes 6.
Feekes 5 is the time to be making your last nitrogen applications and applying herbicides as needed for weed control. However at Feekes 6 you should cutoff for nitrogen applications to avoid leaf injury. Additionally some growth regulator herbicides, like 2, 4-D and dicamba should not be applied.
