CONTROL OF RHIZOCTONIA CROWN AND ROOT ROT WITH SEED TREATMENTS AND POST APPLIED FUNGICIDES IN COMMERCIAL GROWER FIELDS

摘要

Rhizoctonia Crown and Root Rot (RCRR) have dramatically increased in the last decade in the Red River Valley to the point where it is now the most severe root disease impacting yield and quality. Yield losses when environmental conditions favor the disease can exceed 30%. Occasionally disease severity in a field is so great that the field will not be accepted for long term storage and has to be abandoned. University research using fungicides shows that they are a viable option for disease managementbut they are tested under controlled, usually inoculated conditions which leaves growers asking if the individual fungicide or combination of fungicides perform similar within their variable field environment. Options including newly labeled seed treatments, at plant fungicide applications and post emergence applied fungicides have growers wondering if they need to be looking at season long approaches to combatting this disease or if they can get by with one timely application and achieve maximum returns.