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Canola Watch provides timely answers to top canola agronomy questions on diseases, insects, weeds and so much more.
Featured image for “Blackleg heavy in parts of Manitoba”
July 11, 2012

Blackleg heavy in parts of Manitoba

Growers are encouraged to check maturing crop for blackleg infection. It’s too late for fungicide to provide any benefit, but checking now can help
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Featured image for “Issues of the week”
July 6, 2012

Issues of the week

Noticing bud damage? Could be diamondback moth larvae, or many other possible causes. Regular rains in June and so far in July suggest an
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Featured image for “Sclerotinia stem rot: When to split-apply fungicide?”
July 6, 2012

Sclerotinia stem rot: When to split-apply fungicide?

Split applications, which are approved for some fungicides, may be worthwhile in some cases. For instance, if the sclerotinia stem rot risk is questionable
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Featured image for “Top dressing at early flower”
July 6, 2012

Top dressing at early flower

Nitrogen and sulphur top ups at early flower are later than recommended but may pay off if fields are showing obvious signs of deficiency
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Featured image for “More than one insect in a crop?”
July 6, 2012

More than one insect in a crop?

If you have lygus bug and cabbage seedpod weevil in the same field and if they are both at 50% or more of their
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Featured image for “Bud damage may have many causes”
July 6, 2012

Bud damage may have many causes

Insects, heat stress, hail and sulphur deficiency can all cause bud discoloration and damage. Scouting closely for insects may be required to find out
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Featured image for “Insect update: Lygus, bertha, leaf hopper”
July 6, 2012

Insect update: Lygus, bertha, leaf hopper

Check to see if lygus feeding is preventing crop from coming into flower. Bertha armyworm adults are mounting and larvae will start to hatch
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Featured image for “Rescue treatments unproven for hail remedy”
July 6, 2012

Rescue treatments unproven for hail remedy

Before trying any treatment on hail damaged fields, give the crop time to recover. It may recover nicely on its own, likely with later
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Featured image for “Issues of the week”
June 27, 2012

Issues of the week

Canola fields are being assessed for sclerotinia stem rot risk, especially with decent moisture, dense canopies and good yield potential. We have tips this
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Featured image for “Second weed spray may not pay”
June 27, 2012

Second weed spray may not pay

Growers who usually spray twice may not need to spray a second time this year if the canopy has closed, weeds are behind the
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Featured image for “How to assess the sclerotinia stem rot risk”
June 27, 2012

How to assess the sclerotinia stem rot risk

Moisture is the key factor in sclerotinia stem rot risk. Good soil moisture and a few rains in the period starting two weeks before
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Featured image for “How to top dress N”
June 27, 2012

How to top dress N

When topping up with liquid fertilizer, the ideal is to apply when leaves are moist from early dew or a light rain so liquid
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