CANOLA QUIZ - Flea beetles | Canola Council of Canada

1. Flea beetles' favourite weather conditions are....

Cool and moist

Dry and windy

Warm and moist

Warm and dry

2. The "action" threshold for flea beetle spraying is when an average of 25% of leaf area has been lost to feeding, and flea beetles are still active in the field. With good conditions, leaf area loss could escalate to 50% within a day. True or false?

True

False

3. Which of the following situations can increase the economic risk from flea beetles?

A canola field is the earliest emerging brassica crop in the area. 

Plant counts are below 5 to 8 plants per square foot.

Plant growth is slowed due to abiotic factors such as dry soils or frost.

Wind forces flea beetles to feed more on stems than on leaves.

All of the above.

4. All seed treatments are the same when it comes to flea beetle protection.

True

False

5. If flea beetles are at spray thresholds, one option is to add insecticide into the herbicide tank mix. This could present efficacy issues. Why?

Drift-reduction nozzles may not provide the coverage needed for good flea beetle control.

Flea beetle insecticide should be sprayed at night.

Herbicide water volume is insufficient for insecticides.

Flea beetles don't like the smell of herbicides, so will take cover and miss the insecticide.

CANOLA QUIZ – Flea beetles

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