Insects

Canola Watch provides timely answers to top canola agronomy questions on diseases, insects, weeds and so much more.
Featured image for “How to assess leaf area loss from flea beetles”
June 3, 2020

How to assess leaf area loss from flea beetles

The action threshold for flea beetles in canola crops in Canada is an average leaf area loss of 25 per cent or more. How
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Featured image for “Tips for spraying at night”
June 3, 2020

Tips for spraying at night

from the perspectives of herbicide uptake, efficacy and label requirements, night spraying is OK as long as weeds are not under any stress and
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Featured image for “QUIZ – flea beetle risks”
May 27, 2020

QUIZ – flea beetle risks

Four questions that will help with your approach to flea beetle scouting and risk assessment.
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Featured image for “Insects watch: Flea beetles, cutworms”
May 27, 2020

Insects watch: Flea beetles, cutworms

Cutworm feeding results in notched, wilted, dead or cut-off plants. Patches of missing plants could also be cutworms. Include cutworms on the scouting checklist
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Featured image for “PODCAST: Flea beetle behaviour”
May 21, 2020

PODCAST: Flea beetle behaviour

Jim Tansey and Keith Gabert talk about flea beetles – including how far they travel to find the first canola crops, major differences between
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Featured image for “Striped flea beetles feeding on volunteers”
May 13, 2020

Striped flea beetles feeding on volunteers

Striped flea beetles tend to emerge earlier than crucifer flea beetles, and some are already feeding on canola volunteers. Are first-emerging crops at higher
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Featured image for “PPE's recommended for handling pesticides”
May 6, 2020

PPE's recommended for handling pesticides

Respirators for pesticide applicators are NIOSH/MSHA/BHSE approved organic-vapour-removing cartridge with a pre-filter approved for pesticides or a NIOSH/MSHA/BHSE approved canister for pesticides.
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Featured image for “Bertha spraying and pre-harvest intervals”
September 5, 2019

Bertha spraying and pre-harvest intervals

A full-fledged bertha armyworm outbreak continues in the Peace region. Continue scouting, noting that fields at thresholds can be right beside fields with low
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Featured image for “Bertha armyworm at thresholds in Peace”
August 28, 2019

Bertha armyworm at thresholds in Peace

Bertha armyworm numbers are at thresholds in more Peace-region canola fields this week. Growers in the Birch Hills, Saddle Hills and Northern Sunrise areas
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Featured image for “Insect update”
August 21, 2019

Insect update

As predicted by moth traps, the Peace region has fields at thresholds. Beyond there, a few field here and there across the Prairies have
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Featured image for “Look for berthas”
August 8, 2019

Look for berthas

The bertha armyworm risk is fairly low across most of the Prairies, but the insect pest is at high numbers in localized areas. These
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Featured image for “Insect update: Bertha armyworms and more”
July 31, 2019

Insect update: Bertha armyworms and more

Insect pressure is low, for the most part. Localized outbreaks of bertha armyworm and other insects could be found, so scouting is still important,
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