Check pods for feeding from bertha armyworm, diamondback moth larvae, lygus and other pests. If any pod feeders are found, make accurate counts in at least three locations 50 metres apart in each field. Then make spray decisions based on thresholds…
Insects
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Can you identify these five green worms that can be found in canola at this time of year?…
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While scouting canola fields at flowering and podding stages, dig up a few plants in each field and look at the crown and primary root. If the crop has above-ground symptoms, compare the roots of healthy and unhealthy plants. That might help you discover the problem… -
Eggs are not a target for management, but this is a fun quiz that will improve your agronomy knowledge. Look out for these when out scouting the soil or plants for other issues. This is a matching quiz – five eggs, five choices. Can you match all five?…
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Seeing about ground symptoms? Root maggots are one possible cause. Their damage can also increase root disease infections… -
Slugs have been found feeding on canola in wet areas of Alberta. Some fields are starting to flower – which means we have to start talking about cabbage seedpod weevils… -
Four scenarios with "Yes" or "No" answers on application timing…
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Trap counts are showing higher numbers of diamondback moths in a few areas, but this just means that the moths have arrived, and is not necessarily a cause for concern. Flea beetle scouting is more important this week… -
The action threshold for flea beetles in canola crops in Canada is an average leaf area loss of 25 per cent or more. How do you make that assessment?…
