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2024 Wheat Field Day
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JOHNSTON COUNTY CENTER
 
Small Grains Field Day April 25, 2024, 10:00 to Noon
The field day will be located on the corner of Old School Road and Parkertown Road in Four Oaks. We will discuss planting dates, fertility, weed, insect, and disease control. We also have a Barley Variety Trial on-site and a Weed ID session. We will offer two hours of N, O, D, and X pesticide credits and CCA credits.  


Where are we at in this year's crop?  

From what I have seen across the County, wheat appears to be heading depending on planting date and maturity. The following pictures are from the Planting date study in Four Oaks.
Although we are not out of the woods yet, I have not seen much cereal leaf beetle, but I have noticed some powdery Mildew.  

Powdery Mildew
Powdery mildew causes white lesions on leaves and leaf sheaths. Glumes and awns also can be infected when the disease is severe. Fungal growth is mainly limited to outer plant surfaces and can be easily wiped away by rubbing a finger across affected areas. Mature lesions may have dark reproductive structures mixed with the white, cottony growth of the fungus.

For the most part, wheat has been very clean. However, pockets of Powdery Mildew can develop in more lush areas of the fields, such as bottoms and other low-lying areas. Growers should scout and check their varieties for resistance. I have attached a chart of some of our more common varieties and ratings where we have them.  
Attached is a chart from the 2024 NC Agricultural  Chemical manual.  
Head Scab
Head Scab protection can be critical at this time of year. We still have the Head Scab tool, which is located here. Information on Scab can be found here. Unfortunately, very few products prevent Head Scab, and no fungicide cures the disease once it is in the field. It is best to keep an eye on the scab prediction tool and spray if it is recommended during the appropriate time. To optimize the benefit of these fungicides, growers should treat 2 to 7 days after the heads have begun to flower if there is a threat.

Also, we have had some reports of leaf rust in the state. As the weather warms, we could see more rust develop.  Small, orangish-brown lesions are key features of leaf rust infections. These blister-like lesions are most common on leaves but can occur on the leaf sheath, which extends from the base of the leaf blade to the stem node. Lesions caused by leaf rust are normally smaller, more round, and cause less tearing of the leaf tissue than those caused by stem rust.
Stripe Rust
As of today, we have not had a stripe rust alert. A stripe rust epidemic can develop much quicker than a leaf rust epidemic. If scouting reveals stripe rust in your field, a fungicide should be applied soon as possible to preserve yield. Wheat varieties rated susceptible (S) and moderately susceptible (MS) should be scouted immediately. Resistant (R) or moderately resistant (MR) varieties are at low risk. Apply fungicides to fields containing multiple stripe rust areas first before moving on to fields with less noticeable infections.
 
NC State University and N.C. A&T State University work in tandem, along with federal, state and local governments, to form a strategic partnership called N.C. Cooperative Extension.
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