Should say rub off.... Dam auto correctLooks like it could be powdery mildew to me but not 100% sure. I have been fortunate enough not to have to deal with it. Does it run off? I would remove the affected leaves just as a precaution the plant will be fine without them.
Sulfur is from what I have seen a good treatment option in veg but hopefully someone with experience using it chimes in on that.
Yeah it's not mites but I would remove the affected leaves as a precaution. Like I say I can't say it's 100% pm but removing a few leaves will not hurt the plant and hopefully rid you of the problemI've been wiping it off it doesnt seem to be affecting the growth in any major way...I dont think its spider mites but it could be I've seen nothing under the scope. Leaning towards mildew but again I've got great airflow. Just hoping it doesnt get worse...dont wanna spray with pesticides either. Thanks again for all the great brainstorming