White mold is rarely a disease of economic importance in dryland field pea production but can be important in irrigated peas.
Powdery mildew can be a very important disease when conditions are favorable. It reduces seed size and can sharply reduce yields if it develops during early to mid-pod development.
Ascochyta/Mycosphaerella blight can be an economically important disease when cool, wet weather occurs during bloom and pod-fill.
The fungus Rhizoctonia solani causes Rhizoctonia damping-off, crown and root rot of sugarbeet in North Dakota and Minnesota.
The development of wheat fungal leaf diseases (tan spot, Septoria, leaf rust) can be assessed using the NDSU Small Grain Disease Forecasting Model.
On May 23rd, stripe rust was confirmed in winter wheat research plots in Cass County (found by Matt Breiland, Research Specialist) and Adams County (found by John Rickertson, Research Agronomist, Hettinger REC).
The most common early season diseases are damping-off which may be caused by Pythium, Rhizoctonia and Aphanomyces.
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.