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  • Sclerotinia Risk in Canola Forecast Program
  • Sclerotinia Risk Maps Canola Forecast Program.
  • Sclerotinia Risk Calculator Canola Forecast Program.

Sclerotinia Risk in Canola

This forecasting program has been developed by the North Dakota State University Canola Pathology program with support from the Sclerotinia Initiative, the Northern Canola Growers Association, and the Minnesota Canola Council. While the information presented by this program is based on data generated through extensive research, it is only intended to serve as a guide for growers.

This forecasting program has two components, a general risk map and a risk calculator. The general risk map uses weather information to estimate risk of disease development throughout the canola growing areas of the state. This map is updated twice every week starting in mid June and continuing during the canola flowering period. The risk calculator combines information on cultural practices and the field past history of Sclerotinia with weather information retrieved from the nearest NDAWN weather station to estimate the risk of disease development for a specific field. To access the risk calculator visitors are asked to set an account and to provide information pertinent to the field of their interest.

News and Tips for You

May 15 2012

Blackleg is making a comeback

Blackleg is becoming more prevalent in canola fields throughout North Dakota. The reason for this is that new strains capable of infecting commercial cultivars previously considered to be resistant are developing. Blackleg spores spread from canola residues by air currents, thus this year growers should avoid planting canola next to fields that had severe blackleg in the 2011 growing season.If that is not possible, then fungicide use should be considered. Fungicides azoxystrobin (Quadris), prothioconazole (Proline), and pyraclostrobin (Headline), are registered in North Dakota for control of blackleg in canola. These products should be applied when canola plants have no more than four leaves. Older plants are in general less prone to develop the stem cankers that are responsible for yield loss, and thus the economic return of a fungicide application may be reduced.


May 17, 2012

Flea beetles could enhance damage by blackleg

According to

  • NDSU Crop and Pest Report of May 17, 2012
    • flea beetle populations are increasing in canola fields near Langdon. The wounds created by these insects on canola seedlings could increase the probability of infection by blackleg. The action threshold for control of flea beetles is 25% defoliation. Information on insecticides registered in North Dakota for control of flea beetles in canola can be found in the
  • ND Field Crop Insect Management Guide 2012
    • .