For many of the most important diseases of broadleaf crops grown in North Dakota, fungicide efficacy data are now available online at the NDSU Carrington Research Extension Center website.
The IPM scouts visited 143 wheat fields and 16 barley fields last week. Tan spot continues to be the most prevalent disease in wheat and was documented in 38% of wheat fields scouted. Spot blotch of barley was recorded in 6 of the 16 fields scouted.
Potato planting and emergence are behind normal due to the extended winter and delayed arrival of spring and summer. As a result, much of the potato acreage is only recently or not yet planted and emergence will be later than normal.
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 2014.
The start of a cool-wet spring and recent rain events across the state have provided favorable conditions for foliar pathogen infections on small grains. Likewise, IPM scouts are reporting varying levels of tan spot incidence across wheat fields; however, severity is generally low.
In an effort to get crops in quickly, small grain growers may have thought about forgoing seed treatments and plant a higher population instead. I haven’t found any formal research comparing the two, but the situation provides an interesting discussion on risk taking.
The National FHB Prediction Tool also is available for use this season. Although we have no crops near flowering, the southeastern states are experiencing low to medium risks for scab development in winter wheat.
The NDSU small grain disease forecasting website is now available for this growing season. The site uses weather and growth stage data to assess the risk of infection for the foliar pathogens that cause tan spot, Septoria, and leaf rust.
Sugar beet seeds germinate and emerge over a wide temperature range in the presence of adequate moisture and oxygen supply.
The most common early season diseases are damping-off, which may be caused by Pythium, Rhizoctonia and Aphanomyces.
If the rain continues and planting becomes more delayed, we anticipate that growers may consider switching crops.
Research done at North Dakota State University and the University of Minnesota showed that a wide range of plant population resulted in high 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 important that the plants be evenly spaced within the rows.
There were serious incidences of field pea root rots in the north central and the north western regions of North Dakota last year.
SCN Distribution Update
Clubroot of Canola Found in North Dakota
In the US, sugar is processed from sugarcane and sugarbeet. Sugarcane is produced in Florida, Louisiana, Texas and Hawaii. Sugarbeet is produced mainly in Minnesota, North Dakota, Idaho, Michigan, Montana, Nebraska, Colorado, Wyoming, Oregon and California.
Almost all NDAWN locations have had continuous days of weather favorable for tan spot infection in the past week