Home / Canola Watch / July 31, 2013 - Issue 18

• • 2013 - Issue 18

  Issues of the week

  July 31, 2013

  

  Swathing will likely start within a week or 2 for earliest canola fields. Keep in mind that the ideal time to swath is around 60% seed colour change (SCC). Some fields will have to be cut earlier for growers with a lot of canola to get down, but try to avoid cutting before 30% SCC. See this week’s top 10…

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• • 2013 - Issue 18

  Top 10 diseases to look for in August

  July 31, 2013

  • Diseases
  • Diseases other

  

  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…

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• • Flowering
  • 2013 - Issue 18

  Why the missing pods?

  July 31, 2013

  • In-crop
  • Insects
  • Nutrient management
  • Plant establishment
  • Plant establishment other
  • Weeds

  

  Some canola fields are exhibiting missing or stunted pods at the top or middle of stems. Pods in some fields have been described as green on the ends and translucent in the middle. The most likely cause is environmental. The few days above 30°C in early July would certainly cause flower abortion, and the hormone response to a couple days…

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• • 2013 - Issue 18

  Diamondback moth larvae scouting and thresholds

  July 31, 2013

  • Diamondback moth
  • Insects

  

  Diamondback moth larvae are showing up in canola fields. The most accurate method to estimate diamondback moth population density is to count larvae in several locations throughout the field, and determine the average population per unit area…

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• • 2013 - Issue 18

  Ideal swath timing is 60% seed colour change

  July 31, 2013

  • Harvest and Storage
  • Swath timing

  Delaying swathing while you wait for more plants to mature is generally positive for yield, especially at this stage of the season…

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