Started noticing chunks out of some of my clone leaves. Can't see any bugs present and I regularly spread diatomaceous earth every week or so. Is this a nutrition issue or something else? Any advice or help is greatly appreciated. BTW these are clones of my pepper plants from last year if that helps. I just want to make sure whatever it is wont spread to my new seedlings.
tl;dr: whats wrong with these leaves?
by BrownTown2596