Canola Watch – July 29, 2020

July 29, 2020

QUIZ – CLUBROOT/NOT CLUBROOT

Through the pod filling time between flowering and harvest, growers and agronomists will want to take time for a more intense session of clubroot scouting. But what are you looking for? This quiz will help train your eye.

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SCOUTING FOR CLUBROOT: HOW AND WHY NOW?

Vigilantly scout all canola fields for symptoms, even if growing a clubroot resistant (CR) variety. Clubroot galls can start to form about three weeks after emergence, but typically it takes about six to eight weeks for visible galls to form in fields. So galls – if present – will be visible by this stage of the season.

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BERTHA ARMYWORM: UPDATES AND SCOUTING TIPS

Even if an area is low risk according to provincial risk maps, local hot spots can flare up – which is why each farm should make its own assessment on a field by field basis.

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DIAMONDBACK MOTH LARVAE HOT SPOTS

Diamondback moth larvae are generally low across the Prairies so far, but one hot spot has been noted in Rural Municipality 10 in Saskatchewan. This R.M. is south of Regina, near the U.S. border. Some populations of diamondback moth above the economic threshold have also been found in Eastern Manitoba recently.

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WILL HOT, DRY WEATHER STOP SCLEROTINIA STEM ROT?

Not really. If infection got started, then this fungus is in the plant. When conditions are ideal (relative humidity over 80 per cent and temperatures of 20°C to 25°C) then pathogen grows aggressively eating up more tissue. When conditions are not ideal, the disease slows…waiting, patiently.

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CONNECTIONS – VIRTUAL TOURS

A lot of canola companies and organizations are opting for virtual tours this year. If you have a virtual tour you’d like added to this list, please email Jay Whetter at [email protected]

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10 REASONS FOR MISSING PODS

Seeing blanks up canola stems where pods should be? Here are the eight most common causes.

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