Septoria on wheat
By: Pierce Paul, Maira Duffeck and Marian Luis
Wheat is now between Feekes 8 (flag leaf emergence) and Feekes 10 (boot) across the state. Feekes 8 marks the beginning of the period during which we recommend that you begin scouting fields to determine which disease is present and at what level. Septoria tritici leaf spot is usually one of the first to show up, and it has already been reported in some fields. So far, it is restricted to the lower leaves and severity is low in most of the affected fields. This disease is favored by cool (50-68F), rainy conditions, and although it usually develops early in the season, it really does not cause yield loss unless it reaches and damages the flag leaf before grain fill is complete. Continue reading
By: Laura Lindsey, Pierce Paul, and Ed Lentz, CCA
It is important to correctly identify winter wheat growth stages to enhance management decisions, avoiding damage to the crop and unwarranted or ineffective applications. Remember, the exact growth stage cannot be determined by just looking at the height of the crop or based on calendar dates. Remember to stage several plants from several areas within your field.
Here, we will focus on staging wheat Feekes 6.0 through 9.0.
Feekes 6.0: At Feekes 6.0 growth stage, nodes are all formed, but sandwiched together so that they are not readily distinguishable. The first node is swollen and appears above the soil surface. This stage is commonly referred to as “jointing”. Above the node is the head or spike, which is being pushed upwards eventually from the boot. The spike at this stage is fully differentiated, containing future spikelets and florets.
Growers should remove and carefully examine plants for the first node. It can usually be seen and felt by removing the lower leaves and leaf sheaths from the large wheat stems. A sharp knife or razor blade is useful to split stems to determine the location of the developing head. A video showing how to identify the Feekes 6.0 growth stage can be found here: https://www.youtube.com/watch?v=iukwznx4DPk Continue reading
From Laura Lindsey and Ed Lentz, OSU Extension
With melted snow and warmer weather in the forecast, is it time to apply nitrogen to the wheat?
The short answer. Wait until green-up to apply N to wheat.
The long answer. Wheat does not require large amounts of N until stem elongation/jointing (Feekes Growth Stage 6), which is generally the middle or the end of April depending on the location in the state and spring temperature. Ohio research has shown no yield benefit from N applications made prior to this time. Soil organic matter and/or N applied at planting generally provide sufficient N for early growth until stem elongation.
Nitrogen applied prior to rapid uptake by the plant has the potential to be lost and unavailable for the crop. Nitrogen source will also affect the potential for loss. Urea-ammonium nitrate (28%) has the greatest potential for loss, ammonium sulfate the least, and urea would be somewhere between the two other sources. Continue reading
Hessian Fly Free Date by county in Ohio.
Wheat helps reduce problems associated with the continuous planting of soybean and corn. With soybean harvest quickly approaching, we would like to remind farmers of a few management decisions that are important for a successful crop.
- Variety Selection. Select high-yielding varieties with high test weight, good straw strength, and adequate disease resistance. Do not jeopardize your investment by planting anything but the best yielding varieties that also have resistance to the important diseases in your area. Depending on your area of the state, you may need good resistance to powdery mildew, Stagonospora leaf blotch, and/or leaf rust. Avoid varieties with susceptibility to Fusarium head scab. Plant seed that has been properly cleaned to remove shriveled kernels and treated with a fungicide seed treatment to control seed-borne diseases. The 2020 Ohio Wheat Performance Test results can be found at https://www.oardc.ohio-state.edu/wheattrials/
- Planting Date. Plant after the Hessian Fly Safe Date for your county. This date varies between September 22 for northern counties and October 5 for southern-most counties (Figure 1). Planting before the Fly Safe Date increases the risk of insect and disease problems including Hessian fly and aphids carrying Barley Yellow Dwarf Virus. The best time to plant is within 10 days after the Fly Safe Date.
- Seeding Rate. Optimum seeding rates are between 1.2 and 1.6 million seeds per acre. For drills with 7.5-inch row spacing, this is about 18 to 24 seeds per foot of row. When wheat is planted on time, the actual seeding rate has little effect on yield, but high seeding rates (above 30 seeds per foot of row) increase lodging and the risk of severe powdery mildew development next spring.
- Planting Depth. Planting depth is critical for tiller development and winter survival. Plant seed 1.5 inches deep and make sure planting depth is uniform across the field. No-till wheat seeded into soybean stubble is ideal, but make sure the soybean residue is uniformly spread over the surface of the ground. Shallow planting is the main cause of low tiller numbers and poor over-winter survival due to heaving and freeze injury.
- Fertilizer Application. Apply 20 of nitrogen per acre before planting to promote fall tiller development. Do not apply more than 10 lb N per acre as urea in contact with the seed. A soil test should be completed to determine phosphorus and potassium needs. Wheat requires more phosphorus than corn or soybean, and soil test levels should be maintained between 30-50 ppm (Mehlich-3 P) for optimum production. If the soil test indicates less than 30 ppm, then apply 80 to 110 pounds of P2O5 at planting, depending on yield potential. Do not add any phosphorus if soil test levels are higher than 50 ppm. Soil potassium should be maintained at 120 to 170 ppm (Mehlich-3 K) for soils with a cation exchange capacity >6 meq/100 g). For sandy soils with a cation exchange capacity of <5 meq/100 g, soil potassium should be maintained at 100 to 130 ppm. If potassium levels are low, apply between 65 to 180 pounds of K2O at planting, depending on the soil cation exchange capacity and yield potential. Soil pH should be between 6.3 and 7.0. In Ohio, limed soils usually have adequate calcium and magnesium. Sulfur should be added in the spring to sandy soils and soils with low organic matter. Ohio research from the past several years has not shown a yield response to supplemental sulfur on medium to fine-textured soils that have adequate organic matter. For the recently revised Tri-State Fertilizer Recommendations for Corn, Soybeans, Wheat, and Alfalfa see: https://agcrops.osu.edu/FertilityResources/tri-state_info
A new suite of crop staging videos has been built by faculty at The Ohio State University that highlight corn, soybean, and alfalfa. The videos highlight some common staging methods for each crop and connect the staging guidelines to practice using live plants in the field. The videos can be found in the “Crop Growth Stages” playlist on the AgCrops YouTube Channel: https://www.youtube.com/channel/UCbqpb60QXN3UJIBa5is6kHw/playlists. These compliment some of the wheat staging videos previously posted on the AgCrops YouTube channel as well. As the crops progress through the reproductive stages, expect some more videos to be posted! Continue reading
Yield results for the 2020 Ohio Wheat Performance Test are online at https://www.oardc.ohio-state.edu/wheattrials/default.asp?year=2020
The purpose of the Ohio Wheat Performance Test is to evaluate wheat varieties, blends, brands, and breeding lines for yield, grain quality, and other important performance characteristics. This information gives wheat producers comparative information for selecting the varieties best suited for their production system and market. Varieties differ in yield potential, winter hardiness, maturity, standability, disease and insect resistance, and other agronomic characteristics. Selection should be based on performance from multiple test sites and years. Continue reading
From July 10, 2020, via NASS (National Ag Statistics Service)
Ohio NASS Small Grains report July 1, 2020
By Glen Arnold, OSU Extension
Wheatfields have been or will be harvested in Ohio soon and some farmers will plant double-crop soybeans. In recent years there has been more interest from livestock producers in applying manure to newly planted soybeans to provide moisture to help get the crop to emerge.
Both swine and dairy manure can be used to add moisture to newly planted soybeans. It’s important that the soybeans were properly covered with soil when planted to keep a barrier between the salt and nitrogen in the manure and the germinating soybean seed. It’s also important that livestock producers know their soil phosphorus levels, and the phosphorus in the manure being applied, so soil phosphorus levels are kept an acceptable range. Continue reading
By: Jason Hartschuh, OSU Extension AgNR Educator, Crawford County (originally published in The Ohio Farmer)
Wheat provides many additional opportunities for your operation. These options include drainage improvements, weed-control timing, double-crop soybeans, double-crop forages, compaction mitigation, and soil building through cover crops. From the time wheat is harvested, there are about nine months for weeds to grow and soil to erode. If double-crop soybeans are not planted, the use of cover crops will protect the soil and assist with weed control. High populations of cover crops provide competition and soil cover to control weeds. Continue reading
By Clint Schroeder, OSU Extension, Allen County
The 2020 Ohio wheat harvest is rapidly approaching. Now is the time to prepare for a successful harvest. Before the combine goes to the field, a key component will be to have grain handling and storage facilities adequately sanitized. Taking the proper steps now should help eliminate insect infestations that can significantly reduce grain quality or salability.
The majority of insect infestations that occur in stored grains are a result of migration into the bin. These insect populations will be present in piles of spilled grain from the previous year, livestock feed in the area, litter, and weed growth. Newly harvested wheat can also be contaminated when it comes in contact with infested grain that was not cleaned from the combine, trucks, wagons, augers, dump pits, or grain leg buckets. Another source of contamination can be carryover grain in a bin that was not correctly emptied. Continue reading