QUIZ - Insects this week | Canola Council of Canada

1. Dingy and army cutworms have been found in field in southern Alberta. Why would they be found before other common species, such as red backed and pale western?

Dingy cutworms. Photo credit: John Gavloski, MAFRD

Dingy and army cutworms prefer cereals, which are usually seeded first

Dingy and army cutworms cut plants at the root, making damage easy to see

Dingy and army cutworms overwinter as larvae

Dingy and army cutworms curl up on the soil surface

2. Flea beetles are out and feeding. They do need to take bites in order to take in the seed treatment, so some feeding is OK and expected. What is the action threshold at which point spraying is often warranted?

10 per cent leaf area loss, on average across the field.

25 per cent leaf area loss, on average across the field.

10 flea beetles per square foot, on average across the field.

25 flea beetles per square foot, on average across the field.

3. The following is lifted from a Canola Watch Fundamentals article: Because ___ weather is ideal for flea beetles and bad for rapid crop growth, ___ weather makes the flea beetle risk much worse. (Fill in the blank.)

Hot

Dry

Cool

Wet

QUIZ – Insects this week

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