Plant establishment general/other

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  • Top 10 reasons for poor-looking canola

    Poor looking typical canola field 2014

    Growers in many regions are reporting canola fields that just don’t look as good as usual. Many are thin stands with weak plants and variable stages of maturity. Here are 10 most likely reasons.


  • Estimating flea beetle damage in canola

    Flea beetles are the most chronically damaging insect pest of canola in western Canada. Direct losses to oilseed production average 8-10% of the annual crop yield, and in outbreak years flea beetles can cause hundred of millions of dollars damage.The nominal economic threshold for flea beetles in canola crops in Canada is an average defoliation level of 25% or more of the seedling leaf area. Images and descriptions in the following article will help growers determine if a foliar insecticide is necessary to protect their canola from flea beetles.


  • Tempted to seed early? Think frost

    Warm soil temperatures and decent soil moisture in most regions will mean rapid emergence. Seed put in the ground today could be up in seven to 10 days. (The graph below shows the connection between soil temperature and faster more even emergence.) Frost damage risk for these early crops is higher, especially if the plants […]


  • Flea Beetles – Be Vigilant with Thin Stands

    It is crucial that fields are scouted thoroughly and often. A heavy infestation on a stressed or thin stand can do significant damage in 24 to 72 hours. Be prepared in case additional control measures are required. The economic threshold for flea beetle control is when 25% or more of the cotyledons are damaged. However, […]


Canola Watch