Canola School: Why testing matters for clubroot, blackleg and verticillium stripe

Each time farmers or agronomists are in the field is a chance to scout for disease symptoms. Unfortunately, fungicide products aren't curative - and not every product can control every disease. Knowing what disease pressure is present or confirming one disease over the other is a key part of a canola disease managment plan.
Disease testing is one option to be considered when out scouting. Clubroot, blackleg. and verticillium stripe are all diseases that should be being tested for in order to confirm what is being seen in the field. "We cannot manage what we do not know," says Kaeley Kindrachuk in this episode of Canola School.
Testing requires taking physical samples out of the field and sending them to a lab for confirmation. Soil samples for clubroot and stem samples for blackleg, as well as verticillium stripe, can give a grower information that they may not otherwise be able to obtain from scouting alone.
Lab results can help with the decision making process for canola in future years. With clubroot for example, a farmer can tell from the results if the disease has been detected and at what levels. Blackleg comes back as presence or absence and what races are present, and verticillium stripe comes back as presence or absence. All of these results give growers the information necessary to make good decisions as to what cultivars to plant in future years.
For more information on Sask Canola's free disease testing program and how to submit samples, watch the video!
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