Research conducted over the past decade set the foundation for today’s clubroot management practices. This research covered the potential of biofungicides/fungicides, cultivar resistance, and crop rotation for management of clubroot disease caused by Plasmodiophora brassicae. Synthetic fungicides ineffective The fungicides Allegro and Omega (fluazinam) and Ranman (cyazofamid)...

A ≥2 year break from clubroot-resistant canola resulted in a 95% decrease in clubroot resting spore concentrations. In the third year after the harvest of clubroot-resistant canola, resting spore concentrations were similar to those of host-free control plots. Previous small plot research showed the value of...

Canola yield with a three-year break between canola crops was significantly higher than a tighter canola-barley rotation by 18 bushels per acre. Growing clubroot resistant canola in a tight rotation was not a strategy that could be implemented to keep clubroot spore populations low, and...

The maintenance of a naturally occurring clubroot nursery provided an evaluation site for over 60 canola lines, varieties and cultivars over 4 years in southern Alberta. The nursery site was also used extensively for training and extension activities. When you get served lemons, make lemonade. In...

A set of clubroot surveillance practices was developed for effective monitoring of the occurrence and severity of Plasmodiophora brassicae in commercial fields. Clubroot, we’re watching you. A major focus of research into clubroot disease caused by P. brassicae is surveillance of the geographic spread of...

Bleach (sodium hypochlorite) was most effective in killing clubroot (Plasmodiophora brassicae) spores at concentrations above 1.7%. Spray Nine was almost as effective, while 5 other products achieved greater than 95% control. Sanitation of equipment, vehicles, scouting tools and footwear is an important part of preventing the...

Basamid (dazomet) soil-applied fumigant was effective against clubroot and seedling blight in canola. Basamid appears to have good potential as a tool to maintain canola yield and reduce the spread of clubroot where the disease is concentrated, usually at field entrances. Clubroot, caused by the obligate...