Outdoors? If so I'd say leaf miners. Spray Neem oil on the entire surface of the plants (if they are still in veg) about once a week, make sure you get the bottom of the leaves as well.
They look pretty good, this is my 3rd so far, but my first time Low Stress Training, I actually snapped one of the main lines on a Blueberry, and just used a piece of duct tape, it healed completely in about 4 days.