Check your pulse fields and know the difference. Heard from a customer they were mistaken in their weed problems got me looking at mine, and had the same issue.

Sow Thistle left, Prickly Lettuce right   photo: CropWeb™ by UNIVAR

Spines in the midvien of Prickly Lettuce     photo: CropWeb™ by Univar

Check and take proper actions.

– Matt