Insects

Canola Watch provides timely answers to top canola agronomy questions on diseases, insects, weeds and so much more.
Featured image for “Spraying a multi-staged crop”
July 2, 2015

Spraying a multi-staged crop

Crop staging comes into play for herbicide, insecticide and fungicide timing. So crops with plants at various stages — some at flowering, some barely
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Featured image for “10%, 20% and 50% flower”
July 2, 2015

10%, 20% and 50% flower

Sclerotinia stem rot and cabbage seedpod weevil control timing depends on flowering stage. This article will help you estimate 10%, 20% and 50% flower.
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Featured image for “Insecticides for variable staged crops”
June 26, 2015

Insecticides for variable staged crops

Cabbage seedpod weevils are one example of an insect where crop stage is a factor in the management decision. Weevils lay their eggs in
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Featured image for “Assess the real cause of bud loss in pre-bolting canola”
June 19, 2015

Assess the real cause of bud loss in pre-bolting canola

Bud damage and insects are being found together in some canola fields, but that does not mean insects are the primary reason for the
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Featured image for “Insect update: Grasshopper, diamondback, lygus, CSPW”
June 17, 2015

Insect update: Grasshopper, diamondback, lygus, CSPW

Grasshoppers. If populations are significant and crop feeding has begun, a spray or bait application around field edges may be enough to reduce the
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Featured image for “June 10 Quiz — Cutworms”
June 10, 2015

June 10 Quiz — Cutworms

How well can you identify the most common cutworm species found in Canadian canola crops?
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Featured image for “Insect update: Cutworms, flea beetles, aster leafhoppers”
June 10, 2015

Insect update: Cutworms, flea beetles, aster leafhoppers

Flea beetles remain the single biggest insect threat this week, although pressure seems to be waning. Cutworm losses have been reported in a few
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Featured image for “Hot weather can reduce insecticide performance”
June 10, 2015

Hot weather can reduce insecticide performance

Under hot conditions the metabolism of (some) target insects is significantly faster. Control of the pest is more complete when the metabolism of the
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Featured image for “June 3 Quiz — Flea beetles”
June 3, 2015

June 3 Quiz — Flea beetles

Test your flea beetle management skills….
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Featured image for “Cutworm damage usually patchy”
June 3, 2015

Cutworm damage usually patchy

Cutworm scouting begins with a walk through the field looking for bare patches, chewing damage in foliage, or clipped plants. Cutworms and cutworm damage
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Featured image for “Add insecticides to herbicides only when necessary”
June 3, 2015

Add insecticides to herbicides only when necessary

Combining pest control operations to save trips over the field may seem like good economic sense, but consider the following when making this decision….
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Featured image for “Keep It Clean: Two timely reminders”
June 3, 2015

Keep It Clean: Two timely reminders

(1) Many insecticides have limits on how many times a year they can be sprayed on a canola crop. (2) Check approvals for all
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