QUIZ – The Buggles

Jay Whetter July 28, 2026

No, this is not a quiz about “Video Killed The Radio Star” but you might want that three-minute late 1970s diversion before tackling our five questions about insects of the week.

1. This creature can cause canola plants to lodge. What is it?

Cutworm

Flea beetle larvae

Root maggot

Wireworm

2. This is aster yellows. What causes it?

Aster leafhopper feeds on crop and vectors aster yellows phytoplasma

Bacterial infection that increases in severity with canola on canola rotation

Hormone imbalance due to hot weather

Pathogen infection through canola roots

3. Jenny Seward, agronomist in southern Alberta, is finding a lot of diamondback moth larvae in canola fields this week...up to 50 per square foot in some places. What is the economic threshold at the late flowering or pod stages?

2-3 per square foot

5-10 square foot

20-30 per square foot

200-300 per square foot

4. What are these?

Cabbage seedpod weevil larvae

Canola flower midge larvae

Swede midge larvae

Thrips larvae

5. End of July is our usual time to start promoting the Pre-Harvest Interval Calculator. (You'll get a link in the answer.) The pre-harvest interval for chlorantraniliprole insecticides is one day. What is the PHI for deltamethrin?

1 day

7 days

21 days

30 days

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