Standability |
Straight Cut |
Blackleg |
Sclerotinia |
Clubroot Resistance |
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cankers on stems late in the season , resulting in plants that lodge , ripen prematurely , and lose yield . Clubroot is a soil-borne disease that affects the roots of canola plants by causing abnormal ‘ clubs ’ to form which restrict water and nutrient uptake by the plants , resulting in wilted plants and yield loss .
Both diseases are on the rise , and both can devastate a canola crop . Yields can be protected by sticking to a few key principles designed to keep spore levels in check .
• Scout often - Identifying a disease problem early is important ; the earlier a disease is detected , the easier it is to manage spore levels .
• Grow a resistant variety - Todays ’ canola hybrids have excellent genetic resistance to both blackleg and clubroot thanks to a tremendous amount of research and focused plant breeding . Growing a resistant variety will help keep spore levels in check . However , be aware that growing resistant varieties as the only management strategy is not enough to manage diseases in the long term - both blackleg and clubroot pathogens are highly adaptive , and resistance genetics can lose their effectiveness quickly if canola is grown in a tight rotation .
• Rotate crops - A rotation out of canola for at least two years is necessary to lower spore levels for both blackleg and clubroot . For blackleg , these two years will allow the stubble to break down and degrade the blackleg spores before they have the chance to infect the next crop . For clubroot , a break from canola for at least two years will reduce the number of viable spores in the soil by as much as 90 per cent .
• Control host weeds - Eliminate volunteers and other brassica weeds that can act as hosts for the pathogens in non-canola years for maximum success .
Canola 5