There is not sufficient data to support lower rates at this time, however. Crisis Exemption for Ronilin. A crisis exemption for Ronilan was declared by the North Dakota and Minnesota Departments of Agriculture on July 1 for the use of Ronilan to suppress Sclerotinia. Ronilan has provided effective Sclerotinia suppression in Canada. Late Application is not advised.
Late application provides reduced disease suppression.
A Hearty Thank You to Beth Nelson, Minnesota Canola Council, who would not give up on a section 18 for canola and kept pursuing every possible avenue. Also a big thank you to the legislative delegations from both states for their support. Dr. Marty Draper, extension plant pathologist, South Dakota State University, confirmed late blight on tomato the latter part of last week. Weather conditions have been favorable for Cercospora and rows are closing in many fields. It is likely that Cercospora will be identified in additional fields by early next week.