White powdery mold starting on my outdoor leaves

Fishing4life12

Fishing4life12

Active Member
Hey RIU, im back with another question, this time for my outdoor grow. I noticed white powdery mold starting on my leaves of my plant that has already started to bud and wondering whats the best way to get rid of the problem and should i be alarmed with bud growth.
I herd of milk and water or baking soda and water
Any opinions would be greatly appreciated. Thanks in advance.
Fishing4life
 
HighNRG

HighNRG

Member
For PM during flowering I use GreenCleaner, works great! I tried both methods mentioned above but Greencleaner worked 10x better and left no residuals that these other home remedies will leave behind
 
Fishing4life12

Fishing4life12

Active Member
Hey @HighNRG , thanks for the reply. I dont think i can get any of this stuff here in Canada, i mean unless someone brings some across the ditch, lol. Seems like that stuff works wonders and its not avail. here, nor will places deliver here. Appreciate it. Cheers
 
Renfro

Renfro

Well-Known Member
Raising the pH of the leaf surfaces is what you can do at this stage to stop the PM. Simple alkaline materials like baking soda, pH up buffer. Aim for a pH of 8.0 and make sure to get full coverage, using some dish soap will help as a surfactant (1 tbs/gal). Usually 3 tablespoons of baking soda per gallon gets you in the ballpark but it depends on your waters pH.

Potassium bicarbonate is used in many commercial products for PM because potassium is a nutrient and you can order that from a chemical supply really cheap.
 
Fishing4life12

Fishing4life12

Active Member
Thanks guys. I just made some baking soda,water and dish soap mix and hope it works. Its dried and i still see white on the leaves tho. Possibly not strong enough of a mix or its not gonna work.
 
codster25

codster25

Well-Known Member
Fishing4life12 said:
Thanks guys. I just made some baking soda,water and dish soap mix and hope it works. Its dried and i still see white on the leaves tho. Possibly not strong enough of a mix or its not gonna work.
Click to expand...
Yeah I ordered they shit on eBay and it was confiscated at border. eBay replaced it but told the provider shit out of luck. Lol I thought I had pm
indoor over the winter but it was actually mineral residue from hard water and accumulate on the end and sides of
Leaves. Looks a lot alike.
 
Jypsy Dog

Jypsy Dog

Well-Known Member
Renfro said:
Raising the pH of the leaf surfaces is what you can do at this stage to stop the PM. Simple alkaline materials like baking soda, pH up buffer. Aim for a pH of 8.0 and make sure to get full coverage, using some dish soap will help as a surfactant (1 tbs/gal). Usually 3 tablespoons of baking soda per gallon gets you in the ballpark but it depends on your waters pH.

Potassium bicarbonate is used in many commercial products for PM because potassium is a nutrient and you can order that from a chemical supply really cheap.
Click to expand...
Great on Cucumber vines too.
 
SuperNutz

SuperNutz

Well-Known Member
Speaking of surfactants, any tips on a good organic one that won't kill bacteria like BT or bacillus subtilis?
 
AmericanGrower508

AmericanGrower508

Well-Known Member
as said already Potassium Bicarbonate 1 teaspoon per gal water. No need to use anything else to raise ph as it raises ph in fact it's what I use for ph up. I use neem oil or azamax, touch of dish soap and Potassium Bicarbonate as my twice a week IPM in veg but it can be used in flower as well. It will turn pistils red/brown but unless you are planning on making seeds that doesn't matter.
 
CanadianJim

CanadianJim

Well-Known Member
+1 Potassium Bicarbonate. I used it, got it on amazon.ca, got rid of my powdery mildew. You can get Green Cure on amazon.com. A guy just north of me got it and recommends it.
It works the same way as baking soda, but is supposed to be more effective.
 
SuperNutz

SuperNutz

Well-Known Member
When you spray mildew eating bacteria on powdery mildew does it change in appearance(the powdery part on the leaves)?
 
Fishing4life12

Fishing4life12

Active Member
@SuperNutz to be honest, i sprayed my leaves with baking soda, water and a bit of soap. Then a couole days later i think it rained and washed most of it all away. It did in fact change the color of the pistils to amber, even tho these babies were far from ready. As of now, most is still gone and has stayed gone but i do have a few straggler spots here and there, but nothing major or to big.
 
Therrion

Therrion

Well-Known Member
Potassium bicarbonate is what I used . Though I wasn't sure if it was PM or some leaf discoloration, I wasn't chancing it. Either way I haven't seen it since.
 
Nizza

Nizza

Well-Known Member
+1 for green cure it is a great safe product.
its basically baking soda (potassium bicarbonate) with some other stuff
 
SuperNutz

SuperNutz

Well-Known Member
Was just wondering about beneficial bacteria like the Cease brand bacillus subtilis I've been spraying. Everything poos, even microscopic stuff.
 
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