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Bertha
Army Worm Bertha armyworms prefer canola but also feed on rapeseed,
mustard, alfalfa, flax, field peas, and potatoes. They are most damaging to canola and
flax. More
info.. |
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Diamondback
Moth The diamondback moth is an occasional pest of canola across the Prairies. Most
damage is caused by feeding on the surface of filling and maturing pods. |
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Painted
Lady Buttlerfly This caterpillar has been an occasional pest of sunflowers.
Sporadic outbreaks in the Prairies have resulted in localized severe damage of cultivated
fields. Larvae feed primarily on Canada thistle foliage, leaving the stem and
midrib. Feeding temporarily inhibits the weeds but new growth usually develops in the
fall. They also feed on about 60 other hosts, including sunflowers and canola. |
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Crucifier Flea Beetle Host plants include cabbage, turnip,
cauliflower, Brussels sprouts, canola, sugar beets, tomatoes, horseradish, radish,
potatoes, flixweed, wild mustard, stinkweed, lamb's quarters, and other crucifers.
Flea beetles overwinter as adults under leaf litter, along fence rows, and in shelterbelts
and woodlots. They become active in mid-to late May, feeding on volunteer canola and
mustard or on weeds. Later, the flea beetles move to seedling canola or other cruciferous
crops. |
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Blackleg:
A Disease of Canola Blackleg is becoming an increasing problem in the Prairies. There
is a mild and an aggressive strain. The aggressive strain is now widespread. Losses of
over 50% have been recorded in some fields where susceptible varieties of canola were
grown. |
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Sclerotinia
Sclerotinia stem rot is the most serious disease of canola in the Prairies. Losses ranging
from 5-100% have been reported for individual fields. On average, yield losses equal 0.4
to 0.5 times the percentage infection. |
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