Canola Watch quiz – How many berthas? Jay Whetter August 8, 2019 Leave a Comment It’s ‘I spy’ time! This quiz is just one question but too fun to pass up. Train your eye for bertha scouting. 1. Look closely at the photo below. How many bertha armyworm larvae do you see? Click photo to enlarge. (Hint: Berthas can be green, brown and black.) 46810 Loading...