Identification: Grayish brown in colour with a thin light line down the very middle of the back somewhat diagonal markings that look like tire tracks (“V’s”) on back have four equal-sized black dots on the back surface of each abdominal segment.ĭamage: Larvae climb and feed on leaves stem feeding is rare.įigure 5. Source: John Gavloski, Manitoba Agriculture and Resource Development. Identification: Grayish and shiny in colour with a prominent white stripe along each side just above the legs dark spots on the head.ĭistribution: Canadian prairies often found in combination with redback cutworms.ĭamage: Larvae feed on emerging plants at or below the soil surface at night.įigure 4. Source: Frank Peairs, Colorado State University. The head is light brown with small dark spots.ĭistribution: Arid regions of the prairies rarely found in Manitoba.ĭamage: Larvae feed on plants above ground in late afternoon/early evening (surface feeder).įigure 3. Identification: Larvae are pale green-gray to brown in color with black dots along a pale back stripe.
Identification: Mature larvae have two dull red stripes along their back head is yellowish-brown.ĭistribution: Across the Canadian prairies.ĭamage: Larvae feed on plants during the night and are inactive during the day chew on leaves and stems at or above the soil surface (surface feeder).įigure 2. Damage appears as holes cut into new leaves.įigure 1. Identification: Mature larvae are pale grey to greenish grey in colour head is yellowish-brown.ĭistribution: Most commonly found in arid soils of Alberta and Saskatchewan.ĭamage: Typically feeds on stems below the soil surface (subterranean feeder) surface feeds only when soil is very hard or wet. The larval stage is the only damaging stage to canola. There are five prominent cutworm species of concern in the canola growing areas of Western Canada.
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