July 24, 2013
3. Record what you find. With detailed records, including insects found in each field, insect numbers, what they’re feeding on, time of day, temperature and weather conditions, you know which fields to scout more frequently, and you have comparison points for other fields and other years. 2. Follow thresholds. Every major insect of pest of canola has an economic control…
July 24, 2013
Thrips damage shows up in some fields. Bertha armyworms are the bigger issue, with adult counts continuing to build and many areas now at moderate risk, or higher. Read more to see links to latest maps and counts…
July 17, 2013
Bertha armyworm moth counts continue to accumulate across the Prairies. Many areas are now at moderate to high risk, and adult numbers will continue to build this week. Adult counts can hint at the potential level of feeding by the larvae — the actual armyworms — starting about two weeks after the first wave of adults showed up in traps…
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…
July 4, 2013
As canola starts to move from flowering and into pod formation, growers will often notice blanks up the raceme where pods did not form. Here are 7 possible reasons…
July 4, 2013
Leafhopper populations are building, which could increase the risk for aster yellows. Even so, there is not really a good case for spraying for leafhoppers in canola. Why not?…
June 19, 2013
Bees are good for canola. Canola is good for bees. Canola flowers provide an important source of nectar for honey producers in Western Canada: 80% of the honey produced in Canada comes from canola flowers. Honey bees and other pollinators can also increase canola yields. Although napus canola is self-pollinating, studies show that the extra level of pollination that bees…
June 19, 2013
Aster leafhopper numbers are quite low so far this year, down considerably from 2012. Aster leafhoppers carry aster yellows phytoplasma, so without leafhoppers to transfer the disease, there is no infection. Based on what we know at this stage, there is no evidence of a significant aster yellows risk for 2013…
May 29, 2013
A few flea beetles do not warrant an insecticide application. Follow these guidelines when making a flea beetle spray decision:…
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