Canola Watch quiz: Challenging observations

1. Flea beetles have piled onto this canola plant because this one plant has a condition that makes it different from (and therefore more attractive than) all the other plants you can see in background. What is the condition?

It has aster yellows

It's a late-maturing off-type

It's an untreated volunteer

It has aphids, which attract flea beetles

2. What is this sawdust-like substance?

Root maggot chewings

Decayed clubroot gall

Spider egg sac

"Soil your undies" remnant

3. What two things of interest do you see in this photo?

Blackleg

Gall midge larvae

Sclerotinia stem rot

Thrips larvae

Verticillium wilt

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