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Sorghum Nitrogen Rates: Comparing recommendations from standard vs. Haney soil tests
A field scale replicated trial testing different fertilizer nitrogen rates on sorghum was conducted in Stanley County during the summer of 2016.
Brown Wheat Mite Affecting South Dakota Wheat
Recently, there have been reports of brown wheat mites throughout central and western South Dakota. The brown wheat mite is generally more of an issue in the drier parts of the state, or in areas experiencing drought. The feeding injury caused by these mites leaves white or brown spots that are referred to as stippling.
Which mite is it? Identifying the mites in wheat fields
In South Dakota, the most commonly encountered mites in wheat are wheat curl mite and brown wheat mite. In addition to feeding, wheat curl mites are vectors of Wheat streak mosaic virus. Brown wheat mites can build up large populations and injure wheat through feeding. There are other species of mites that may also be observed in wheat, but generally do not reach populations large enough to cause significant injury.
Planting Considerations for a Late Spring
Farm fields in some areas are unusually wet this year with many low areas under water. These conditions will make planting a challenge for farmers this year.
Continue Scouting Wheat for Aphid Populations
Aphid populations in winter wheat continue to be observed in South Dakota. The major questions now are whether or not aphid populations are at economic threshold and if spraying is really necessary.
Determining Sorghum Seeding Rate
Seeding rate can have significant impacts on sorghum yields.
Planning for Quality in Wheat
Excess moisture and limited field days have made it difficult for producers to add nitrogen to wheat fields this year. This could be a concern, as nitrogen contributes to both yield and protein. This year, it may pay off to take tissue and soil tests from questionable wheat fields to help with nitrogen application decisions.
Powdery Mildew: A Disease Concern in Field Peas
Producers of field peas may need to scout for powdery mildew this year. Powdery mildew is a late-season fungal disease that can impact peas if weather conditions are conducive. However, this disease can also occur in early planted fields in South Dakota under the right environmental conditions and when the crop canopy is heavy.
Monitor Canola Fields for False Chinch Bug Activity
While scouting canola this week, I came across a field that had plants along the edge that looked like they were suffering from drought stress, but given the recent rain I doubted that to be the case. Closer inspection of the stressed plants indicated that they were covered in false chinch bugs. Although false chinch bugs are not normally an issue in canola, very large populations do have the potential to reduce yield.
Differentiating Two Species of Sunflower Seed Weevils
While scouting sunflower, there are two types of seed weevils that you may encounter. They are the red sunflower seed weevil and the gray sunflower seed weevil. It is possible to observe both of these species on a single sunflower head.