If you suspect mites, get a magnifiying glass and inspect the leaves that show signs of spots. Look under the leaves and on top. Look for very small mites. You will notice them moving around.
what causes powdery mildew? its too small to take a pic of.. i'll try at lunch..Sounds like powdery mildew,pics would make it easy to say for sure.
Hey Zube,Its so confusing.. I have some what looks like dried water on a bunch of my fan leaves.. Not many like 10 .. There is white specks.. Which could be just dust.. I have no idea.. How do you know when it first starts?
wow thanks for the pic.. yeah I definately don't have that... yet.
it almost looks like little pieces of ash. can you knock them off by blowing on them? cuz that happens to the white specks when i do it.Hey Zube,
I am familiar with thrips but not so much w/ mites.
The first signs are tiny white or silver specs showing on the tops of the leaves. You may not see any at this point. They are usually on the bottom punching little holes in your leaves. They are quite small and fast. They can fly but prefer to run. It may take a long time for them to get bad (3 months in my case) but eventually they will cover the leaves with spots and the plant will lose vitality.
I have been using neem for over a month now and they are getting better but still there.
It will not necessarily ruin your crop but it doesn't help any.
I suggest regular spraying with neem oil as it keeps them in check and doesn't hurt the plants.
Good Luck
EM
basically 2 screened windows in a roomventilation and circulation are two different things. powder mold grows all over the place in colorado.
yeah i'm soooo close to harvest.. don't want some critter messing it up!I think if you can blow it off,there's no worries.
Not familiar with thrips but mites yes. Look on the tallest growing shoot, you may see small strands of webbing, they reside on the underside of the leaves making em hard to spot because one is almost always looking down on a plant. They look like tiny specks of dirt, why is dirt onyour leaves, its not, get a dope scope (the ones used for close up views of trichomes works great) if you suspect anything, ANYTHING, pull the leaf off and inspect it, you will notice it immediately. The eggs will only be visible this way as they are way smaller than the mites themselves which are hard to see as it is. THe eggs are small perfectly spherical white things and they will probably be all over like something sprinkled em like a fucking garnish for your plant, totally unnatural, all you should see on a leaf is veins and cysolith hairs, anything else is a pest. Azatrol works, so does Doktor Doom, mites are pussies. In serious cases whole buds will be consumed in webbing and you will visibly see whole colonies of mites crawling and going about their business, you have to check every day if you suspect anything, just grab your tops and pull em over to the side and check the undersides thoroughly, all plants, even clones, diligence pays off!
It may just by dried up nutrient solution....does it look like a salt stain? Think greasy baseball cap..