Begining of powdery mildew...3 weeks to go

Godinz · Sep 26, 2017

Hey all my plant (sensi star) was doing very good up until today when i noticed a bunch of white spot on my leafs (mostly lower part of the plant).

Today was an exceptional hot 39celsius and humid day with no wind at all.

I took 20 mins to wipe off all the PM i could see with a scott towel moisted by a solution of water ans peroxyde..light dosage.

What should I do next considering im about 2-3 weeks from harvest ?

5 gallon pot, outdoor , one more nut feeding this friday to go. (Buds picture is from yesterday)

Chief Chieferton · Sep 28, 2017

Godinz said:
Hey all my plant (sensi star) was doing very good up until today when i noticed a bunch of white spot on my leafs (mostly lower part of the plant).

Today was an exceptional hot 39celsius and humid day with no wind at all.

I took 20 mins to wipe off all the PM i could see with a scott towel moisted by a solution of water ans peroxyde..light dosage.

What should I do next considering im about 2-3 weeks from harvest ?

5 gallon pot, outdoor , one more nut feeding this friday to go. (Buds picture is from yesterday)

Thin out the plant and keep the air moving. Doesn't mattah if your from the steam bath that used to be coastal mass. This is ridiculous.

SouthCross · Sep 28, 2017

I'd try baking soda. It's an old remedy for mildew on roses.

Here's a little information about it. I've used it before on mini roses and big roses. The deal is to be careful using it. It can leave too much sodium on the leaves.

https://www.thespruce.com/baking-soda-for-controlling-powdery-mildew-1402520

Budgrowguide · Sep 28, 2017

This mildew is very hard to control, your whole grow area is likely contaminated with spores. UV light on an on going basis will help keep this at bay. You can try 2 teaspoons of organic apple cider vinegar mixed with one quart of water. Mist this mixture onto your plants to both kill the powdery mildew growth and prevent any more from cropping up

mackey · Sep 28, 2017

I have it bad in my flower box outside. Treated with baking soda and saw improvement. Purchased Bushdoctor force of nature fungicide from fox farm as was afraid it could get inside with the weather we've had this summer. Used the fungicide on flower box and really disappointed for $30. no better results than spraying weak peroxide or soda. Well it made it inside but only a very small area of one plant. Not sure I want to put this fungicide on my plant if it doesn't work that well. Just read that burning sulfur will get rid of it not just control it. Any thoughts? Two plants have only 3 weeks to go. Other two in veg.

mackey · Sep 28, 2017

http://bigbudsmag.com/getting-rid-of-powdery-mildew-on-marijuana/

Sounds like burning sulfur is the way to go. More money for burner, growing keeps me broke!

Godinz · Sep 28, 2017

mackey said:
http://bigbudsmag.com/getting-rid-of-powdery-mildew-on-marijuana/

Sounds like burning sulfur is the way to go. More money for burner, growing keeps me broke!

I took a look at my plant...two days after cleaning her. There was lots of improvement...she had a lot less white spots on leafs.

Im gonna keep on looking everyday for the next 10 days or so then ill harvest i think.

vostok · Sep 28, 2017

Pm is no biggy but the forthcoming pythium is...

keep that bitch at bay

I use neem oil, or anything to break that surface tension

good luck

Bugeye · Sep 28, 2017

mackey said:
http://bigbudsmag.com/getting-rid-of-powdery-mildew-on-marijuana/

Sounds like burning sulfur is the way to go. More money for burner, growing keeps me broke!

I don't know about burning sulfur during flower. Not a choice I would make.

tpc_mikey · Sep 28, 2017

Just be sure when you harvest you give them a good bath after trimming with lemon juice and backing soday in warm water it will remove any mildew that may be in your buds you dont want to smoke that shit, Jorge Cervantes has a great Youtube video about it.

cire408 · Sep 28, 2017

tpc_mikey said:
Just be sure when you harvest you give them a good bath after trimming with lemon juice and backing soday in warm water it will remove any mildew that may be in your buds you dont want to smoke that shit, Jorge Cervantes has a great Youtube video about it.

But he only uses water and peroxide. Is lemon juice and baking soda better? Just did the h202 thing. Works ok if you're not heavily infested.

vostok · Sep 29, 2017

I have used the same method but

wrap the pot base in a trash bag

and dip the mold infected plant into a pot of airtemp water and 10% bleach

dip again into a rinse to clear the bleach

allow to air dry

very effective on all molds

good luck

Godinz · Sep 29, 2017

Bleach on the buds ? Really

cire408 · Sep 29, 2017

Godinz said:
Bleach on the buds ? Really

Remind me never to smoke out with that guy.

Wedum Boise · Oct 4, 2017

Godinz said:
Hey all my plant (sensi star) was doing very good up until today when i noticed a bunch of white spot on my leafs (mostly lower part of the plant).

Today was an exceptional hot 39celsius and humid day with no wind at all.

I took 20 mins to wipe off all the PM i could see with a scott towel moisted by a solution of water ans peroxyde..light dosage.

What should I do next considering im about 2-3 weeks from harvest ?

5 gallon pot, outdoor , one more nut feeding this friday to go. (Buds picture is from yesterday)

PM is systemic, wiping off the leaves will not eliminate it. Cleaning off the spores may give you the impression as "out of sight, out of mind" but the hyphae network is internalized in the epithelial cells. The only way to know for sure your plant is PM free is to genetically screen for it. I can do the testing for you the only requirement is a small hole punch (4mm) and the test takes less than two hours. DM for details. Below is data that I did for a member on this forum.

cire408 · Oct 4, 2017

Wedum Boise said:
PM is systemic, wiping off the leaves will not eliminate it. Cleaning off the spores may give you the impression as "out of sight, out of mind" but the hyphae network is internalized in the epithelial cells. The only way to know for sure your plant is PM free is to genetically screen for it. I can do the testing for you the only requirement is a small hole punch (4mm) and the test takes less than two hours. DM for details. Below is data that I did for a member on this forum.

You seem knowledgeable on PM. Is it ok to smoke buds with PM after giving them a h202 bath? Did that with a plant I harvested but I think it still has PM. You can't see any but my allergies go crazy when I smoke it. Thanks.

Indacouch · Oct 4, 2017

vostok said:
Pm is no biggy but the forthcoming pythium is...

keep that bitch at bay

I use neem oil, or anything to break that surface tension

good luck

I spray neem as a PM prevention as well ....so far so good .....I imagine a lot has to do with the environment as well....if it's perfect for growing PM ....chances are ...............

Wedum Boise · Oct 4, 2017

cire408 said:
You seem knowledgeable on PM. Is it ok to smoke buds with PM after giving them a h202 bath? Did that with a plant I harvested but I think it still has PM. You can't see any but my allergies go crazy when I smoke it. Thanks.

Soaking the buds will ruin the quality bud because your also washing away terpenes as well. It's like I mentioned before pm is still present after a surface wash. That will probably explain why you initiate an allergic response...mildew is type of mold.

Wedum Boise · Oct 4, 2017

Indacouch said:
I spray neem as a PM prevention as well ....so far so good .....I imagine a lot has to do with the environment as well....if it's perfect for growing PM ....chances are ...............

Neem oil will only suppress it.

cire408 · Oct 4, 2017

Wedum Boise said:
Neem oil will only suppress it.

Don't know about that. Shit is still potent and crystaly

Wedum Boise said:
Soaking the buds will ruin the quality bud because your also washing away terpenes as well. It's like I mentioned before pm is still present after a surface wash. That will probably explain why you initiate an allergic response...mildew is type of mold.

Washing your outdoor buds makes sense. Dirt, bugs and anything else that could have accumulated over the grow I'm sure mess with the smoothness and flavor. The bud I washed still looks good and is extremely potent so don't know how much of the good stuff is washed away. But that being said it still must have some PM on it. Thinking of making bubble hash.

Begining of powdery mildew...3 weeks to go

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