Possible powdery mildew?

JNxKushxKing

Well-Known Member
hey everyone, been growing outdoors for years now, been always noticing slight white spotting randomly on some of the leafs here and there, usually rip off the leaves or the tips with the white on it, was wondering if this is like powdery mildew or what it may possibly be, and ways to prevent it from happening and to stop it from happening?
 

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GroErr

Well-Known Member
That does look like PM, although it almost looks like something was spilled on them too. If it's PM all you can do outdoor is spray them with H2O2 or Baking Soda. I use the baking soda solution but it only lasts about 7-10 days so it's on-going, less time of course if you have a lot of rain.

1 tsp. Baking Soda per gallon
a couple of drops of vegetable oil
Better if you make up a batch ahead of using it, shake every few hours for a day or two and it seems to work better.
 

cannn

Well-Known Member
Ive heard very good things about green cure. Never used it personally but search it up and youll find many recommend it. Certainly seems to be pm

As for preventing it, it shouldnt appear in the right humidity with plenty of air movement. Outdoors you dont really get to control that but itll help to keep water from getting on the leaves as much as possible. Thats probably your cause. Some use green cure regularly as a preventative.
 

cannn

Well-Known Member
Milk can also stop/prevent PM. Cut it 50/50 with water.
This is new to me. Seems the recomendations are for no higher than 40% milk while some use as low as 10%. Probably wouldnt spray it on flowering plants personally but maybe someones whos done that can comment. I imagine theyd get a sour milk smell lol
 

CriticalCheeze

Well-Known Member
That sure is PM. I battle it outdoors where i am every year. Make sure the insides of your plants have air circulation room.
thin the inside up a bit if you have too. Airflow doesn't allow mold to incubate that well. Get a Potassium bicarbonate product like Greencure. Don't spray in high sun. wait until evening, like 6pm or after. Wet any really bad leaves before removing them with your hands,as touching other leaves will/can spread spores.

If you're in the northeast like me you're going to have it at some point outdoors.
 
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CriticalCheeze

Well-Known Member
This is new to me. Seems the recomendations are for no higher than 40% milk while some use as low as 10%. Probably wouldnt spray it on flowering plants personally but maybe someones whos done that can comment. I imagine theyd get a sour milk smell lol
Greencure is better. Seen people use milk before. Looks weird on plants. Not a fan personally.
You got to wash it all off the next day or it can fuck with your leaves.
 

chemphlegm

Well-Known Member
I was able to control it in my kennel with a solar powered attic fan running blowing over head like a ceiling fan during night times.
 
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