PM that NEVER goes away. HELP!

So for the last 6 months I've been battling PM issues. Dont seen anything during veg, then by 2nd week of flower it starts and get progressively worse.

Room temps during the day are 25C-28C and night time temps are probably around 18C-22C

Humidity is around 45%-55%

210 cfm intake, 2 oscillating fans and 400cfm fan/filter exhausted through 2 hoods.

I started using a dehumidifier around 6 months ago as well. In wondering if the dehumidifier is what's causing my issues by spreading the spores?

I've done everything to get rid of it, completely cleaned, painted and bleached everything in grow room after harvest, spray plants with Milk/water and also End All fungicide (just started that one) and it still comes back. I just sprayed the plants 2 days ago and I can see PM growing everywhere regardless.. I'm about ready to cut everything down and call it quits. This is super frustrating. And I have been throwing for 10 years with out this issue.

What's your thoughts?

My first thought is thinking a photo would really help. Are you using clones?

If you have persistent pathogens in your tent, you can try nuking it before your next grow. But I'd ensure the room the tent is in is also very clean. You could possibly be reinfecting your tent each grow. And don't go out and tend your zucchinis outside then later tend your tent.

I started over and got an ozone generator on amazon to run in the room through all my fans/ac/dehumidifier. Threw out tents and ducting and got new ones. Been 6mo and no pm

I don't use a tent to flower I use my spare bedroom. The plants are perfectly healthy other then the PM, no deficiency no burning, no under/overwatering. I grow both seeds and clones. Hunt new phenos while I continue with my current keepers. My mother room has no signs of PM, neither in my Veg room. Just the flower room.

Properly spaced

shawn705 said:

Properly spaced

Click to expand...

Well considering I'm sure you know how much airflow and humidity your plants need indoors to prevent this issue, then perhaps you've been infected by a particularly persistent form of Sphaerotheca that is spread through greenhouses? For that reason I asked... clones?

After this grow just nuke everything and gas it for like a week. You'll need to be able to close the room completely.

Never had that mofo PM since 1979. Can keep ya up atl night worrying about those gals, let alone the time and energy spent. Got it this yr indoors. An A#1 cluster ____.. tried all those bullshit home remedies and wised up. There's shit loads of fungicides out their.....mostly preventative, mostly. I used " Banish " ( personal choice, just like a deodorant). Claims to kill on contact. I had great results. Talked with some organic chemist in SoCal.....knew his shit about this (refreshing).. I'm always skeptical.

Keep your temps stable and lower your humidity below 45%. And a few hours of 100+F will kill the old and spores. But at a loss of density due to dehydration. Beyond copper safe early in flower you have temp, humidity and uv light to work with. Air flow only helps spread spores once bitten.

When all else fails mist with H2O2

Your likely spreading pm through clone material and mother plants. It’s like having herpes. A lot of people have it snd have nooo idea. Even “healthy looking” plants will have that pathogen literally inside the plant tissue. It’s only when conditions snd time is right does it flush and propagate.

you need to start 100% over with your genetics.
Super clean space. Veg too
Intake filter.
trash all plants.
stett new seeds and go from there.

Won't help as much with treatment, but beyond the usual thorough cleaning between cycles, I would start treating everything with a couple of biofungicides, a good combo is Southern Ag garden friendly fungicide and Regalia. Plants treated with Regalia might still get PM, but I've never seen a serious outbreak on treated plants. Also, look into the thyme based treatment sprays, there are several on the market-just be careful and test spray something first because I've burned plants with it before. I keep a "test plant" around in my mother tent just for things like this. I had to get into a weekly IPM rotation to finally get rid of my last PM problem-neem/silica sprays, aspirin-root drench and foliar, potassium bicarbonate, chitosan. Alternate between them and spray weekly. If you are in flower, keep in mind that thyme sprays will impart an Italian flavor to your buds and potassium bicarb tends to burn pistils, but honestly, if the outbreak is bad you do what you have to do. Good luck!

.

Like Rurumo suggested, I suggest Regalia as a soil drench or foliar spray.

I've been battling PM for the past 6 months as well, I bought an AIRoss hydrogen trioxide generator which didn't cure the problem in itself so I added Regalia soil drench.

Three weeks into flower and not a sign of pm.

My current plants are all from seed, the PM started when I took in clones from an online shop.

One other good spray or post harvest bath is Dr Zymes Eliminator.

.

I've started using a potassium silicate spray outside in the garden and didn't have any PM for the first time in years last growing season.

That shit will take it dry and love it, could give a shit about moisture, showd up at 40%. Never had any luck with elevated temps.for treatment...had temps steady at 112F...several treatments...nada. it just didn't help, not that others aren't successful. A lot of fungicides sold seem pretty sketchy, unknown info (e.g. " is it carcinogenic....what's products of combustion.......proprietary ingredients ) . Contrary to consensus that PM not systemic, I think, some strains are ,ike the one harassing me. The super rapid spread, the early signs on young leaves. Ventilation(sucking) certainly not re-entraining spores, very low turbulence. Certainly not isolated where small portions removed and problem fixed. That shit gets well established before the eye picks up on it. Bugs are a piece of cake compared to this fungus from hell. I use "Banish".....a.germanium oil extract. Love it. After scrutinizing MSDS sheets, EPA. specs. , talking with SoCal organic chemist in this field, I was much more confident.

That shit will take it dry and love it, could give a shit about moisture, showd up at 40%. Never had any luck with elevated temps.for treatment...had temps steady at 112F...several treatments...nada. it just didn't help, not that others aren't successful. A lot of fungicides sold seem pretty sketchy, unknown info (e.g. " is it carcinogenic....what's products of combustion.......proprietary ingredients ) . Contrary to consensus that PM not systemic, I think, some strains are ,ike the one harassing me. The super rapid spread, the early signs on young leaves. Ventilation(sucking) certainly not re-entraining spores, very low turbulence. Certainly not isolated where small portions removed and problem fixed. That shit gets well established before the eye picks up on it. Bugs are a piece of cake compared to this fungus from hell. I use "Banish".....a.germanium oil extract. Love it. After scrutinizing MSDS sheets, EPA. specs. ,ppl pltalking with SoCal organic chemist in this field, I was much more confident.

Go out in the yard with magnification and look for PM. Where I'm at it's everywhere out there.

That damn all American breakfest bright and early in the morning, A big bowl of smoke ! Better than Prevagen.....the clarity and enhanced focus is amazing.

rmax said:

Go out in the yard with magnification and look for PM. Where I'm at it's everywhere out there.

Click to expand...

So true...we suck that shit up all day..

Thanks for the insight everyone. I decided to kill off 2 of my perpetual plants that still had 6 weeks of flower left as they were getting bad compared to the ones that only have 2 weeks left to go. Will just ride it out with those ones. As for my veg and mother room I decided to spray e erything with a copper based fungicide called End-All 3in1. I sprayed everything until it was dripping. I also ordered Rhino Skin from advanced nutes, apparently it's a silica based product that helps defend again PM.