With winter wheat and barley harvest in full swing, several specialists and crop professionals have reported high deoxynivalenol (DON) levels in the harvested crop.
Michelle Gilley, a research specialist at NDSU and the USDA sunflower unit, surveyed 105 sunflower fields this summer. She assessed the incidence of infected plants and, when possible, collected pathogen samples for race determination and fungicide sensitivity work that will be done this winter.
Now is a great time to examine your soybeans for diseases; particularly stem disease whose symptoms appear late in the season; brown stem rot, charcoal rot and sudden death syndrome (not yet found in North Dakota).
The NDSU Extension Service and the North Dakota Soybean Council are working together on three soybean cyst nematode (SCN) field days this summer. The three field days will be on September 18th (near Hunter, ND), September 22nd (near Wyndmere, ND) and September 23rd (near Galesburg, ND).
The NDSU Extension Service and the North Dakota Soybean Council are working together to coordinate an SCN soil testing reimbursement program again in 2014.
Goss’s bacterial wilt and leaf blight of corn was found in northwest McHenry County last week indicating that now is a good time to start scouting for this disease.
In the last several weeks, clubroot has been found in several fields in the NE part of the state.
With the wide range of planting dates this year, wheat is flowering at different times. If you have late-planted spring wheat that is approaching flowering, use the scab risk models to determine if a fungicide application is needed.
Over the past two weeks, the IPM scouts visited 181 wheat fields and 8 barley fields. Scab was reported in 41 wheat fields and scab incidence ranged from 1% to 51% within those fields.
As sunflowers begin to bloom it is important to scout for sunflower rust. Sunflower rust was found on volunteers and wild sunflowers early in the growing season, and environmental conditions have been very favorable for rust development, making disease development likely.
In the last week I have been receiving questions about dry bean rust, and I encourage growers to scout for the disease.
Bacterial blight is showing up on dry edible beans throughout the dry bean growing regions of North Dakota and Minnesota.
Last week we wrote an article about the high levels of soybean root rots showing up in the region. Although multiple pathogens can cause root rots on soybeans, Rhizoctonia has been consistently showing up this year.
During the past two weeks, I had the opportunity to visit several winter wheat production fields and winter wheat variety trials located on NDSU Extension and Research Centers.
The IPM survey scouts visited 124 wheat fields last week. Tan spot was detected in approximately 84% of the wheat fields.
We have observed many rust diseases in the last couple weeks...
The IPM Crop Scouts have surveyed over 50 sunflower fields in the last two weeks and found downy mildew in approximately half of them.
Cercospora leaf spot is the most devastating foliar disease of sugarbeet in Minnesota and North Dakota. The disease is caused by the fungal pathogen Cercospora beticola.
Stripe rust of wheat was observed in Renville County, ND in winter wheat on July 15, 2014
We have received many questions about dying soybeans. The cause is, at least in part, severe root rot in much of the state.