Clubroot Flashcards
Where in Canada was club root first reported?
Alberta in 2003
When was Club Root found in MB?
2013
What is the causal agent of Club Root?
A Phytoplasma called Plasmodiophora Brassicae
What is the underground symptom of club root?
Galls
What are the above-ground symptoms of club root?
Yellowing, Wilting, and Stunting
How much yield loss does club root cause on a global scale?
10 - 15%
By 2016 how many fields in AB had clubroot been confirmed in?
2443
Describe the disease cycle of club root.
Resting spores reside in the soil. When the soil is warm and moist, resting spores germinate into zoospores (with flagellum) and seek out root hairs to penetrate. Once in the root, zoospores produce more zoospores, which infect the main root. This pathogen leads to cell division, creating Galls. Galls restrict water and nutrients, causing yellowing, stunting, and wilting of plants. Eventually plant starts to decay and zoospores are released into the soil.
When do primary and secondary infections occur in Clubroot.
Primary Infection: When zoospores first attach to the roots.
Secondary Infection: When zoospores start reproducing within the root.
What are the favorable environmental conditions for clubroot?
Warm soil (20-24)
Acid soil
High soil moisture.
How does clubroot spread?
Through the soil, so it could be through machinery, wind, etc.
When should you sterilize equipment for clubroot?
When equipment is being transferred between fields.
What are the 4 ways to manage clubroot?
- Isolate the infected areas.
- Use resistant varieties
- Use long rotation
- Weed Management.
How many years rotation should be used for club root?
4
How many spores are required in one gram of soil to see symptoms of clubroot?
80,000 to 100,000
