powder fawking mildew!!!

[Onepunchko]

Its been one thing after another this run, and now I just noticed a tiny bit of PM. Im 6 weeks into flowering and its only on 2 small spots in that room, but of coarse my luck, its in my veg room as well. Ive read about the solutions on here, but Im curious how this happens. My temps are a little high like 80-85 (with co2), but my RH is never above 45. Will hot temps do it? Once I get rid of it, what can I do to make it stay gone?

 

[MynameStitch]

Hot temps can cause it to happen just as much as cold temps, but normally there has to be a high RH, are you using a meter in the room to determine this RH % ?
Or going by you?

but with co2 it can bring your temps up too, what temps are you going at without co2?
I don't know if co2 can progress it or not.......

but most of the time it's the temps and humidity.

If you brought it something that had spores, weather it's from outside or not you can bring it in the house on cloths.

With that far into flowering.... you been misting any plants? Veg plants?
Your veg and flower room in the same room?

 

[DIGITALHIPPY]

you should move your/a small carbon filter and a small fan into your room to filter the spores in the air.

second, imediately get somthing with sodium bicarbonate (ph up earth juice crystals?) and mix a sprayer with 1 liter of RO and enough of the ph up to make the water 9~10PH then spray down the plants(right at lights out), the ph u will kill the PM on the leafs (most of it) and the high PH on the leaf now should make it hard on the PM to spread, as a high ph environment is not what they want.
you could get a sulfer burner, or ozone generator, thoes both help kill fungi&bacteria

IN THE FLOWER ROOM
IMEDIATELY remove any leaf infected with PM. pinch it at the stem/stalk or cut it, try not to flick it that will release spores. you dont want to spray the flowers with anything. its too far along...
at the end of harvest my sugestion is to use some caned air to spray the spors off the buds if there are any....

 

[julsbagell]

when the lights go off is the humidity still 45? when temps fall humidity goes up when lights are off.we had to run a dehumidifier when lights were off and only when lights off.that late in flower should be ok if its only a few spots take plants out and wipe down leafs with seranade. spraying anything when lights go out that late in flower is a bad idea.after crops done wipe the room with bleach and water.

 

[bongorilla]

when the lights go off is the humidity still 45? when temps fall humidity goes up when lights are off.we had to run a dehumidifier when lights were off and only when lights off.

I noticed that too when the lights are off the humidity rises in my sealed/c02 room.. been thinkin about running a vented exaust/HEPA intake when the lights are out and turn the vent exaust off when the lights go on. and inject c02..

also chillers raise the humidity a little too..

HEPA 99.97% filters will remove the spores they come in contact with but still the RH has to be about 40% in a sealed room or the conditions are too good for PM . I'd just cut off whats infected at week 6.

neem oil in veg and maybe early flower is suprisingly effective for powdery mildew as a deterant.

good luck..

 

[Onepunchko]

Thanks everyone. I am using a sentinel controller that does it allin the flower room. The only intake besides when the door opens is being pulled in through a hepa filter. The veg room is another story. After reading what you guys say, Im sure it has to be the veg room. I run a perpetual harvest (every month), and my veg room has been kinda under construction. Im building a box as we speak to veg in, so hopefully that will help.


I pulled 3 plants out and I will be getting serinade tomorrow. So, will it be ok to bring them back in after they get treated and wiped down?

 

[julsbagell]

yes its prob all over, by the time you see it the plants are allready infected.all you can do is keep it in check and dont spray seranade on any of the bud but Im sure you allready know that stuff smells like ass.youll be cool just keep eyes peeled cuz that stuff spreads like fire if you let it go to long.sounds like you caught it early.

 

[Onepunchko]

I cant find any on the buds, but like you said, Its probably all over. What can I use to clean it off since I dont want to spray the serinade on it.

 

[julsbagell]

You cant clean the buds just keep cleaning the leafs and keep your eyes open.right now just keep doing what your doing keep humidity low good airflow wipe them down with the serenade youll be cool.sounds like you watch your girls real good just keep rotating them and cleaning them.how many weeks you got left?

 

[PharmaCan]

Powdery mildew is very much misunderstood. I would suggest that you read this entire thread:

http://www.icmag.com/ic/showthread.php?t=43220

As DIGITALHIPPY suggested, high pH water will kill the PM on the surface, and you can spray it on your buds. If you get PM on the buds, and don't eradicate it immediately, it will permeate the buds and make them unsmokable.

Botanicare "Hydroguard" works well, both as a foliar spray and systemically (in with your nutes).

BTW - I've had PM when the RH was 17%, so I wouldn't put a lot of effort into getting your humidity down, thinking that will solve your problems.

PC

 

[julsbagell]

I agree it has to be taken care of immediately but a few spots does mean you need to spray all your bud with water at 6-7 weeks into flower. also humidity does not cause pm but it sure does spread alot faster and your also right about airflow dense canopys, dead spots make a good breeding place for pm.I would not spray anything on my buds that late in flowering.I would rather cut off infected pieces and toss them.

 

[OriginalyPosted]

few spots ant no thang just pull the infected leaves the spring time seems to allways bring pm with it .