May 25, 2023

QUIZ – Guess the leaf area loss

The action threshold for flea beetles in canola in Canada is an average leaf area loss of 25 per cent, or more. This quiz has four photos to train your eye on how to estimate 25 per cent leaf area loss. Can you identify the leaf area loss for each?

Thank you to Justin Pahara, AAFC Lethbridge, for the photos.

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