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Thresholds for lygus bugs and cabbage seedpod weevil, for example, are based on a specific sweep net technique. If you’re not doing a complete 180° pattern, walking while you sweep, and keeping the net near the top of the canopy, your counts could be significantly different from someone using the recommended techniques…
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Lygus bug numbers are high in some fields, but remember that as pods harden and get leathery, lygus will not be able to penetrate and cause damage…
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Malathion CANNOT be used to treat bins where canola will be stored or to treat canola as it goes in to storage…
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Canola growers in pockets across the Prairies are seeing a rise in bertha armyworm feeding. Check your fields, know the economic thresholds, and be mindful of bees when spraying…
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Growers in some areas are spraying for late season insects, including lygus, bertha armyworm and diamondback moth. Make sure to scout…
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The pre-harvest interval is the number of days that must pass between the last application of a pesticide and cutting of the crop. Cutting is either swathing or straight cutting…
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Diamondback moth and bertha armyworm numbers are fairly low so far this year. Slugs and aphids are a concern for a couple canola growers…
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Cabbage seedpod weevil adults have arrived and are feeding on volunteer canola at the bloom stage in southern Alberta and southwest Saskatchewan. Weevils move to canola fields at the bud to early flower stages. Growers should start scouting…
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Lygus bugs are feeding on canola in the Peace River region and in some parts of central Alberta. Insecticide control at the bud stage is rarely effective or economical. Under good growing conditions, canola can grow through this early damage without any yield loss. Instead of spraying, step up monitoring and proper sweep net sampling and be ready to take…
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