April 26, 2012
Detection of Clubroot DNA Raises Potential for Disease to Occur in Manitoba
Manitoba Agriculture, Food and Rural Initiatives (MAFRI) is reminding farmers to follow best management and disease-prevention practices as they begin seeding their 2012 canola crop.
Proper equipment sanitization, especially removal of soil from field equipment, is the most important factor for preventing the spread of soil-borne disease. The use of disease-resistant varieties when growing canola, proper crop rotation and good weed management of alternate hosts will decrease the likelihood of a soil-borne disease infesting a field. These practices will also help prevent heavier infestations from developing within a field where a disease may already be present at undetected levels.
Soil samples taken from two unrelated fields in 2011 have been confirmed to contain clubroot DNA at extremely low levels. No symptoms were found on canola plants in the fields during the 2011 season or on plants subsequently grown in the soil under regulated greenhouse conditions. These are considered negative clubroot cases, but are still being termed as non-symptomatic fields of concern.
The soil samples were collected and tested through the Manitoba Canola Disease Survey, with funding provided by the Manitoba Canola Growers Association. Over the last three years, 209 soil samples from across the province have been collected and sampled. These results mark the first time clubroot DNA has been identified in soil samples from Manitoba.
The 2012 Manitoba Canola Disease Survey will continue and include between 150 and 175 fields surveyed with 70 to 90 fields having soil samples collected to analyze for clubroot DNA. In addition, the fields confirmed to contain clubroot DNA from the 2011 survey will be monitored and have more soil samples collected for further testing.
Clubroot can cause premature crop ripening and economic losses due to reduced yield in host crops including canola. The spores are soil-borne and long-lasting, surviving in the soil for up to 20 years, where they are able to cause disease. Once the disease is established in a field, it requires long-term management solutions.
MAFRI acknowledges Canola is an important crop to Manitoba producers and precautions need to be taken to ensure its continued profitability in this province.
For more information contact MAFRI's Crops Knowledge Centre at 204-745-5630.
MAFRI ADVISES BEST MANAGEMENT PRACTICES FOR DISEASE PREVENTION
– – –Detection of Clubroot DNA Raises Potential for Disease to Occur in Manitoba
Proper equipment sanitization, especially removal of soil from field equipment, is the most important factor for preventing the spread of soil-borne disease. The use of disease-resistant varieties when growing canola, proper crop rotation and good weed management of alternate hosts will decrease the likelihood of a soil-borne disease infesting a field. These practices will also help prevent heavier infestations from developing within a field where a disease may already be present at undetected levels.
Soil samples taken from two unrelated fields in 2011 have been confirmed to contain clubroot DNA at extremely low levels. No symptoms were found on canola plants in the fields during the 2011 season or on plants subsequently grown in the soil under regulated greenhouse conditions. These are considered negative clubroot cases, but are still being termed as non-symptomatic fields of concern.
The soil samples were collected and tested through the Manitoba Canola Disease Survey, with funding provided by the Manitoba Canola Growers Association. Over the last three years, 209 soil samples from across the province have been collected and sampled. These results mark the first time clubroot DNA has been identified in soil samples from Manitoba.
The 2012 Manitoba Canola Disease Survey will continue and include between 150 and 175 fields surveyed with 70 to 90 fields having soil samples collected to analyze for clubroot DNA. In addition, the fields confirmed to contain clubroot DNA from the 2011 survey will be monitored and have more soil samples collected for further testing.
Clubroot can cause premature crop ripening and economic losses due to reduced yield in host crops including canola. The spores are soil-borne and long-lasting, surviving in the soil for up to 20 years, where they are able to cause disease. Once the disease is established in a field, it requires long-term management solutions.
MAFRI acknowledges Canola is an important crop to Manitoba producers and precautions need to be taken to ensure its continued profitability in this province.
For more information contact MAFRI's Crops Knowledge Centre at 204-745-5630.
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