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With day time highs in the 30s or high 20s, growers should wait for cooler days before swathing the crop, if possible. Cutting canola in hot conditions will lead to rapid dry down and desiccation, which increases seed shrinkage — and leads to yield loss…
Canola Watch Posts
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Hail damage can cause crops to mature unevenly. Judging when to swath multi-stage crops can be tricky. If the field has distinct late and early parts, the two parts could be swathed at different times. If not, then make the swath decision based on which plants are likely to contribute most to yield…
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Glyphosate is registered for pre-harvest perennial weed control in canola. Glyphosate is to be applied when the majority of seeds are yellow to brown in colour and seed moisture is less than 30%. Heat fits between glyphosate and Reglone on the speed of dry down spectrum. Reglone is a contact herbicide (only kills what it contacts) and is registered in…
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Bertha armyworms keep eating to within a few days of pupating. These 1.5” late-stage berthas eat much more than at smaller stages, doing a lot of damage in a week if numbers are at thresholds… -
Many canola fields are within 5 to 10 days of swathing, which limits the choices for insecticides — based on pre-harvest intervals. Here are the pre-harvest intervals for insecticides registered for insect control in canola. Try the interactive PHI tool at www.spraytoswath.ca… -
Check those patches of pre-mature ripened canola before or during swathing. Try to identify what cause this pre-mature ripening. Use the Canola Diagnostic Tool at www.canoladiagnostictool.ca to help with the assessment. It could be blackleg, clubroot, sclerotinia, root rot or something else entirely. Growers can use this scouting information to plan rotations, choose varieties, and update fungicide decision-making for next… -
Plant pathologists from across the Prairies are surveying canola for disease levels. For each field surveyed, they select 20 random plants at 5 random locations for a total of 100 plants. For blackleg, they pull up each plant and clip the stem just below ground level. Each stem is then rated for what percentage of the stem cross section is… -
This growing season is presenting some unique challenges - very localized insect threats (reports of individuals with only one or two fields out of many at threshold), individual canola fields that are in flower for 6 weeks and counting, etc. Each field needs to be looked at individually so decisions can be made efficiently, timely and when necessary. Be diligent… -
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