Home / Canola Watch / Insects / Page 40
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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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Canada’s crop protection rules allow growers to tank mix two products as long as they are both registered for the crop in question and at the timing and rates used. But these rules do not ensure these products can be mixed without problems in the tank (they may create a gummy mixture that ruins the sprayer) or without antagonizing each…
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Insecticide to stop lygus bugs from feeding on canola 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 action at the pod stage if necessary…
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Flea beetle spraying continues in Manitoba where crops are advancing slowly due to excess rain and limited warmth. Redbacked cutworms are still causing severe damage in southern Alberta. Some sprayed fields need to be reseeded…
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Cleaning out the sprayer protects a sensitive crop, it protects people working with the sprayer, and it protects the sprayer and its components. The following article by AAFC's Tom Wolf provides some handy tips…
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Spraying has been required in pockets all across the Prairies, particularly for redbacked cutworms in the Peace region, central Alberta around Vermilion and Vegreville, and west central Saskatchewan. Flea beetles have been sprayed on early-seeded and slow developing canola. And the Peace region has grasshoppers eating fields already…