They are small, dark, appeared on some Paul Parks seedlings after I re-potted them and affect only older leaves. The new leaves stay clean. Is it a problem? What should I do? Thanks.
I have sometimes seen similar pitting from Physan; have you used any quaternary ammonium compounds on the seedlings like Physan? FWIW: they usually do fine after minimal Physan damage.
Thanks.
I didn't use Physan or any oher solutions on them. Mechanical damage could come from my clumzy fingers during re-potting.
I was just worried that it is some kind of virus or something serious and fatal.