Clubroot Is On The Move

Once seen as an Alberta-specific disease issue, clubroot has grown to be a significant disease problem across Manitoba and now has recently been identified in NW Saskatchewan and the Peace Country of Alberta. This disease has now become a significant concern for all canola growers.

Clubroot was first reported in 2003 near Edmonton, Alberta. Since then, it has become a prevalent disease in Central Alberta. It was also initially found in two fields in Manitoba in 2013. Why should you be concerned? An early infection with favourable conditions and moderate to high spore loads can lead to 100% loss, while low spore loads with less favourable conditions may result in little or no yield loss.

Managing Clubroot On Your Farm

Good management practices can help prevent the spread of clubroot to and within your fields. Focus on these three practices:

 

Prevent Infestation

You can help prevent clubroot infection on your farm by performing these stewardship practices:

  • Scout fields early, often and carefully
  • Clean and disinfect equipment, vehicles and boots
  • Practice soil conservation to reduce soil movement. Reduce tillage and soil disturbance to minimize soil and pathogen spread within a field and reduce movement caused by wind and water
  • Avoid use of straw, hay, green feed, silage and manure from infested or suspect areas
  • Avoid use of seed of any crop (for example, wheat seed) harvested from infected fields
  • Keep host weeds in check, especially volunteer canola, in all crops

 

Practice Rotation

Crop rotation is essential to the management of the clubroot threat.

  • Rotate crops to manage spore loads – the longer the rotation, the better
  • Canola Council of Canada recommends a minimum 3-year crop rotation

 

Protect Your Fields

When the first outbreak of clubroot occurred in 2003, growers had no genetic line of defense. Today, clubroot-resistant canola is an effective and trusted strategy. We recommend:

  • Planting Pioneer® brand canola hybrids with the Pioneer Protector® clubroot resistance trait in both infected and clean fields
  • If you plant clubroot-resistant hybrids on fields without clubroot, this will not introduce the disease into your fields. In fact, existing spore populations are reduced when resistant hybrids are grown.

 

Leading The Industry In Developing Clubroot Resistance

Pioneer Hi-Bred Canada delivered the first clubroot resistant hybrid back in 2009. Our extensive breeding platform includes:

  • Multi-source clubroot resistance breeding strategy
  • Stacking clubroot resistance genes
  • Multi-site testing and characterization

This approach has allowed Pioneer Hi-Bred Canada to develop a lineup of Pioneer Protector® Clubroot resistant hybrids that are adaptable across Western Canada and deliver high yielding canola hybrids with very good standability. Many of our current canola hybrids contain our consistent, multi-race clubroot resistance – providing a high level of resistance to the most prevalent race of clubroot (race 3) and resistance to other races 2, 5, 6 and 8.

Clubroot Susceptible

Clubroot Susceptible

Photo Courtesy of a Pioneer field plot southwest of Edmonton July 2017.

Figure 1 – The above canola hybrids in the photo have no resistance to variants of clubroot races 2 and 3.

 

Clubroot Resistant

Clubroot Resistant

Photo Courtesy of a Pioneer field plot southwest of Edmonton July 2017.

Figure 2 – Pioneer® hybrid 45CM36 with a new source of clubroot resistance to variants of races 2 and 3.

 

Plant Canola With The Pioneer Protector® Clubroot Resistance Trait For Peace Of Mind

Pioneer Hi-Bred Canada offers a wealth of valuable resources to help growers maximize their yields and protect their crops from disease and harvest losses.

The threat of clubroot is real. We invite you to review these recommendations and consider which of the five canola hybrids with the Pioneer Protector® clubroot resistance trait would best suit your farm in 2019.