Winter wheat and spring wheat are approaching (or have approached) the growth stage when producers will consider tank mixing a fungicide with a herbicide for management of early-season fungal leaf spots (tan spot, Septoria leaf spot) and weeds.
Pea Seed-borne Mosaic Virus (PSbMV) is a viral disease that can cause substantial yield and quality losses in lentils and peas and can also infect chickpeas, faba beans and vetches.
The fungus that causes blackleg can survive on canola residues for two to three years and is capable of releasing spores during that period.
Researchers at North Dakota State University and the University of Minnesota have demonstrated that a wide range of plant population with uniformly spaced plants resulted in high yield and recoverable sucrose, but plant populations of 175 to 200 plants per 100 foot of 22-inch wide rows consistently resulted in the maximum recoverable sucrose per acre. It is critical that the plants be evenly spaced within the rows.
The NDSU Extension Pest Management App (which houses information from the Plant Disease Management Guide, Insect Control Guide and Weed Control Guide) has recently been updated with new features.
Additions to the 2016 North Dakota Field Crop Plant Disease Management Guide (Fungicide Guide) (05/05/16)
Each year the NDSU Extension Plant Pathology team receives information to update the fungicide guide and the table below highlights the recent additions of recently labeled of combinations of active ingredients.
The Plant Pathology Department at North Dakota State University will again be providing the potato Blightline service at no charge to the potato industry of North Dakota and western Minnesota in 2016.
It is estimated that the US will plant 1.159 million acres of sugarbeet in 2016. American Crystal Sugar Company will plant just over 400,000 acres, Minn-Dak will plant 115,000 acres, and Southern Minnesota Beet Sugar Cooperative will plant about 119,000 acres.
There were several diseases detected in wheat and sunflower this year. Some diseases were found consistently throughout the state, while other diseases were more localized to a particular region. Regardless, the timely information obtained by the scouts is critical in updating growers and agricultural professionals throughout the state. Below is a summary of the disease data from the 2015 growing season for wheat and sunflowers.
We are seeing several late-season stem diseases show up in North Dakota; notably, brown stem rot and charcoal rot. As a result, I am reprinting this article from last year.
Soybean cyst nematode can cause 15-30% yield loss before any above ground symptoms appear and we know that it is spreading in North Dakota. Whether or not you take advantage of the North Dakota Soybean Council sampling program, we encourage soybean growers to sample for SCN.
The NDSU Extension Service and the North Dakota Soybean Council are working together to coordinate a SCN soil testing reimbursement program again in 2015.
Although we have had a warm and relatively wet July and August, Cercospora leaf spot was not a major problem in most production areas early in the season up to mid-August.
Over the past two weeks, areas of the state have encountered rain events with high winds and hail. The wind and hail has caused leaf and stem injury in the crops and increases the risk of bacterial disease development.
Less frequent rains and high temperatures are going to stress plants with root problems. Root rot infections often occur early in the growing season, particularly when the soil is wet.
I have had received fewer reports on sunflower rust than on dry edible bean rust, however, conditions for rust development have been very favorable in much of the state.
Frequent dews and warm temperatures continue to provide a favorable environment for rust to develop on dry edible beans.
Cercospora leaf spot is the most damaging leaf disease of sugarbeet in our area.
Timely applications of fungicides are very effective at controlling Cercospora leaf spot (CLS) on sugarbeet.
Harvesting of wheat and other small grains is starting to begin across the state, whereas some of the wheat has a few more weeks before full maturity.