Harvest w/Powdery Mildew...Please Help w/Pics

It is time to harvest but I'm noticing a little bit of what appears to be powdery mildew on some of my plants. I'm looking for solutions that will preserve the quality of the weed when looked at under close scrutiny. I have picky friends if you know what I mean.

1. Can I treat them after I cut them down? Will it spread during drying?
2. It seems that mildew is located mostly on the leaves. Can I just cut off the affected leaves and still have quality weed?
3. What's the best way to treat w/out spraying stuff on the flowers? Will sulfur mess up the smoke?
4. Am I screwed

Thanks for the help!!!

it's too late to spray anything. at this point i'd harvest it and cut off all and any mildew spots. it does appear to only be on the leaves. if it gets to the buds then you're screwed.

Does the mildew continue to spread once dried?

Thanks so much!

Mildew will continue to grow after harvest if not cared for. Lower the humidity in your drying area and get all that mildew shit outa there.

I had the same problem recently and I sprayed with high alkali water mixed with a low concentration of H2O2.about 1.5%.

Did it about 1 hour before the lights came on, then turned a bunch of fans on the girls to help dry the surface and then let the heat from the lights make sure the water that got into the buds dried out. Did this about 7 days before harvest. I would be afraid to spray when cropped as you are just pumping water into every space in the bud and asking for bud rot, or feeding the mildew with humdity.

I just cropped and am drying at the moment, so I added a dehumidifier into the drying closet incase there was any mildew remaining. It looks good, and is ready to be bagged today, hopefully quality hasnt suffered as a result. If I get time I'll let you know how it somkes.

Hope it goes well for you, cause it sucks getting this far and then having mildew mess up those lovely buds!

Here's a recommendation....

Hydrogen peroxide 3%.... I haven't seen any sign of yay or nay on this..... But I have harvested around 5 plants now that had it on them (why we harvested them early) and we just sprayed (soaked) every single bud with peroxide before hanging in the drying room.....

There is bud ready for curing that has been in the dry room at 75 degrees 50 % humidity for 6 days and roughly half a pound of mildew covered bud seems to have been ridden. I have found a few articles that show that when used on powdery mildew it will kill both the spores and mycelia of the mildew....

It has turned any of my calyxes that weren't red To red, and has left slight browning where the powdery mildew was....

can't imagine it has harmed the plant..... No loss in potency... plus it turns into water while drying

Thanks for the help!!!

drumsinttown said:

Here's a recommendation....

Hydrogen peroxide 3%.... I haven't seen any sign of yay or nay on this..... But I have harvested around 5 plants now that had it on them (why we harvested them early) and we just sprayed (soaked) every single bud with peroxide before hanging in the drying room.....

There is bud ready for curing that has been in the dry room at 75 degrees 50 % humidity for 6 days and roughly half a pound of mildew covered bud seems to have been ridden. I have found a few articles that show that when used on powdery mildew it will kill both the spores and mycelia of the mildew....

It has turned any of my calyxes that weren't red To red, and has left slight browning where the powdery mildew was....

can't imagine it has harmed the plant..... No loss in potency... plus it turns into water while drying

Click to expand...

i don't know why i forgot about peroxide. stuff works pretty damn good. i did the same thing, sprayed it while trimming.

fdd2blk said:

i don't know why i forgot about peroxide. stuff works pretty damn good. i did the same thing, sprayed it while trimming.

Click to expand...

Damn!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!1

I had the exact same thing on an Ak-48 that loves PM...just on leaves...spread a bit to buds in paper sack after hang dry. Salvaged ~10g to see if I even want to keep this problem child....but Damn!!!! most of it is in my bag of trim.

Now my question is if it is safe to make butter, hash, or hashoil (I figure this is the safest, but I want to make butter...CORNBREAD!)

Thanks in advance.

i used some mildewy trim to make hash once. i could still smell the mildew in it. other people said they didn't though. coukd just be because i knew it was there.

another option would be to spray with a saturation mix of baking soda and water. or a bordeax mixture could help too. the baking soda mix will dry to a fine powder on the leaf and change the surface ph to 7 and powdery mildew can no grow.

You can spray with it tap water.Don;t breath it in....

Erysichthon said:

another option would be to spray with a saturation mix of baking soda and water. or a bordeax mixture could help too. the baking soda mix will dry to a fine powder on the leaf and change the surface ph to 7 and powdery mildew can no grow.

Click to expand...

Similarly...I use a modified "Cornell Formula", and would use it up till harvest if the RH was low enough. To one Gallon tap water...1T baking soda, 1T Hemp seed oil (Can-ola, Maz-ola, olive oil etc) and 1T Br. Bronner's Hemp-peppermint oil soap (bugs hate this shit)...shake the piss out of it and spray as needed...Note I did n ot shake the spray bottle first and got more baking soda which left visible residue on leaves in veg...seems to be holding it back better so maybe more baking soda?

JoeCa1i said:

You can spray with it tap water.Don;t breath it in....

Click to expand...

I think this works if the pH is high enough...my water used to be 7.6 and in the last couple of months it has dropped to 6.5

Any opinions on Cannabutter with mildew?

I was thinking this morning about all the talk about it being very harmful to smoke PM bud due to the spores getting in your lungs and causing problems or people who have allergies and the shape of the spore which binds with histamine receptors of the allergic and could cause death...

I was reading where someone actually had some rational thought on this and reminded those in the debate that PM is ubiquitous in the environment...along with many other mold spores, bacteria and yeasts. they are on us and everything we touch and eat.

Now while inhilation of the spores in their natural and viable state may very well be harmful...incinerating them undoubtedly changes the shape (denatures the proteins) of the spore making it simply the pieces of what was once whole. Likewise eating it should do the same if in fact it is the shape that is what causes a release of histamines.

I also think that PM may not be the same as the smelly mold that grows on wet cut bud. It seems to be specific to live plant matter and is not visable to the naked eye (after looking at my trim bag) after drying completely....makes me wonder how much PM I have smoked in 25 years

Disclaimer: While I do have a degree in Bio...I am really thinking aloud here...don't go kill yourself with PM on my dribble!

walterdog said:

It is time to harvest but I'm noticing a little bit of what appears to be powdery mildew on some of my plants. I'm looking for solutions that will preserve the quality of the weed when looked at under close scrutiny. I have picky friends if you know what I mean.

1. Can I treat them after I cut them down? Will it spread during drying?
2. It seems that mildew is located mostly on the leaves. Can I just cut off the affected leaves and still have quality weed?
3. What's the best way to treat w/out spraying stuff on the flowers? Will sulfur mess up the smoke?
4. Am I screwed

Thanks for the help!!!

Click to expand...

I'm in the same situation. So far I've bought pm wash from the makers of mighty wash. I've also tryed 3% hydrogen peroxide spray at a 40-60% peroxide to perferibly distilled or r/o. They say the pm don't like ph fluxes but imho being a noob mind you pm is a b**ch its just been progressing to all leaves. I've hear baking soda (not baking powder) u can make a paste like stuff and apply that but not on flowers obviously. In spraying pm wash once this 4th oct 16 and today lost a nug today from botrytis. I think ill do an at time harvest so I don't lose any more only got week tops left of growin season anyhow.I'm learning as some problems arrise that I had not looked into and am stumped. I believe you can see some in the uploaded file.

drumsinttown said:

Here's a recommendation....

Hydrogen peroxide 3%.... I haven't seen any sign of yay or nay on this..... But I have harvested around 5 plants now that had it on them (why we harvested them early) and we just sprayed (soaked) every single bud with peroxide before hanging in the drying room.....

There is bud ready for curing that has been in the dry room at 75 degrees 50 % humidity for 6 days and roughly half a pound of mildew covered bud seems to have been ridden. I have found a few articles that show that when used on powdery mildew it will kill both the spores and mycelia of the mildew....

It has turned any of my calyxes that weren't red To red, and has left slight browning where the powdery mildew was....

can't imagine it has harmed the plant..... No loss in potency... plus it turns into water while drying

Click to expand...

For the record I tried this some time ago with all of my harvest. I trimmed all leaves off and broke buds apart. Threw away the leaves. Then I washed it with a hydrogen peroxide solution. After that I fast dried the buds. It all turned out to be ok to smoke and the mildew did not grow back in the jars. I can't speak for loss of potency but this can be done without ruining the harvest completely.