QUIZ - Verticillium stripe | Canola Council of Canada

1. Which of the following symptoms is unique to verticillium stripe?

One side of the stem discoloured

Discolouration inside the canola stem cross section

Microsclerotia growing under the peeling stem epidermis

Weakened lodging stems

Disease scouting at this stage of the season should include targeted AND random assessment. For targeted scouting, check plants (individual or in patches) showing discolouration or premature ripening. Look for symptoms on above-ground parts and roots. For random scouting, which of the following describes a good basic protocol?

Enter the field from the west side (due to prevailing winds) and look for symptoms.

Walk to the middle of the field (away from headlands) and collect 20 plants to send to a lab.

Check 20 plants at five sites in a “W” pattern (100 plants total) in each field.

Hire an agronomist (with a specialty in disease scouting).

Seed companies have cultivars for 2026 which claim advanced verticillium stripe tolerance. What is one thing to keep in mind when choosing that trait?

Yield loss from verticillium stripe is highly exaggerated.

The verticillium stripe tolerance trait reduces resistance to clubroot.

Canada’s canola seed registration program does not yet have a system to quantify verticillium stripe tolerance.

Adding another disease tolerance trait means lower yield potential.

QUIZ – Verticillium stripe

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