It looks exactly like rust. Eagle 20 or Bayer disease control are the only things that helps. Once you get rust in your room its almost impossible to get rid of. I have bleached(12 oz a gal) and used ammonium chloride between grows and it always comes back in the end. What I have been doing is spraying once in veg once day 1 flower and once 1 week into flower. I normally see the 1st signs at day 35 of flower. It is a very slow moving fungus. What I have observed it only effects fan leaves. I have not seen any major decrease if any at all as long as you control it. Keeps your nutes a little higher than normal. As soon as you start to flush the whole room will look like Autumn in a few days.
u.g.u Reviewed by u.g.u on . Yellow Leaf Dots Spreading Completely Over Some Leaves (It's not spider mites) Hi All, I'm trying to diagnose this leaf problem. It's currently affecting almost every plant in the room, some significantly (half the leaves), others totally minor. It doesn't seem to have any pattern: the edge plants (least light, least heat) have it no more or no less than the center plants. I know there are a lot of factors to consider in diagnosing a plant problem, but maybe someone will know what's going on -- once they see the pics and read the post. The pictures show how it Rating: 5