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They are: 10. White rust 9. Fusarium wilt 8. Grey stem 7. Alternaria black spot 6. Downy mildew 5. Root rot and foot rot 4. Aster yellows 3. Clubroot 2. Sclerotinia stem rot 1. Blackleg…
Top 10 diseases to look for in August
July 31, 2013
Diseases other
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Hail at flowering
July 10, 2013
Canola is quite resilient to light hail at up to 20% flower. The crop can flower longer to compensate, and may recover with only minimal to moderate yield loss. Canola has also shown remarkable recovery from more intense hail at 20% flower. However, a crop flattened by hail is unlikely to recover. If regrowth occurs, which is possible, plants are…
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Root maggots and disease
July 10, 2013
Root maggots and root disease often show up together in the same field. Root maggots are white and up to 10 mm (half an inch) long — just like maggots. Maggot feeding can damage root crowns and impede water movement, causing wilting. Severe feeding can cause plant death. Severe root maggot damage can occur in fields with back to back…
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Biologicial fungicide: Serenade use tips
July 10, 2013
Because Serenade works differently from other fungicides, we want to share these instructions for best results, as provided by Bayer CropScience:…
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Seedling diseases in deep-seeded canola
June 12, 2013
Canola seeded too deep is at higher risk of seedling diseases. Deep seeding requires a long hypocotyl for the plant to reach the soil surface, which exposes more of the plant to soil-borne disease pathogens. Deep seeding also extend the days to emergence, which means the plant is at its vulnerable stage for longer…
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Clubroot BMPs for agronomists
May 15, 2013
Agronomists and other staff traveling from field to field are encouraged to use the following best management practices (BMPs) to avoid spreading clubroot-infested soil. 1. Park on the road or in a grassed approach. 2. Wear plastic or Tyvek disposable booties over existing footwear. 3. Rubber boots worn without booties must be cleaned before leaving the field…
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Moving soil, moving clubroot
May 8, 2013
The highest risk operation to introduce and spread clubroot is the one that moves the greatest amount of soil throughout the farm and across the countryside. Field equipment carries a lot of soil, which is why equipment sanitation is an important way to contain the disease. Others common ways to move soil include utilities companies working from field to field,…
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Rotation’s role in clubroot management
April 4, 2013
These photos from canola plots grown in clubroot-infested soils in Quebec show how rotation, especially for MS and S varieties, improves yield. Rotation also plays an important role for growers relying on R varieties in clubroot infested fields. Short rotations using resistant varieties will select quickly for clubroot pathotypes that are not controlled by the genetic resistance. This can rapidly…
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How to use the Canola Diagnostic Tool
March 6, 2013
Give the brand new online Canola Diagnostic Tool a pre-season test drive at www.canoladiagnostictool.ca. Start with a problem scenario that you encountered in a canola field in 2012, and work through the tool to see what potential causes it provides. Read the cause descriptions and “ways to confirm” to determine which cause is most likely…