I recently was in a winter canola field that the population of diamond back moth larvae (little green worm) was too high to let go without applying a pesticide.  Canola crop was still in good condition and still had good to high yield potential. 

Other canola fields I had seen recently did not have any insect pest pressures, but some producers were requesting an insecticide application, so evidently, although not a widespread infestation, in some cases winter canola in under some insect pressure.

I would suggest you might stop by and look at yours, if you have any.

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