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Insects: Canola can handle some lygus feeding
Our current economic threshold tables for lygus in canola may be too low when applied to current canola production systems across the Prairies. If a canola stand is healthy and…
Latest Issue | November 13 2024, Issue 27
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Insects: Leafhoppers, berthas, blister beetles, cutworms
Leafhoppers are more plentiful and carrying more aster yellows phytoplasm this year, but spraying is rarely effective. Bertha counts are starting to spike in some locations. Cutworms are still feeding… -
Missing pods can have many causes
Any stress can inhibit proper fertilization of the flowers. Common stresses included heat, drought, excess moisture, insects, herbicide damage, and nutrient deficiency. In many cases the cause may seem obvious,… -
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 plan for next year. Try to… -
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 inflated risk for sclerotinia stem rot… -
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 at early bloom, growers could use… -
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 and crop yield potential is high… -
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 economic spray thresholds, spraying may provide… -
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 which might be the cause, especially…
