May be a useful trick to know for the noobs that end up dealing with powdery mildew

[Alwayslearnin]

If you notice that you have any white mildew starting , you can get a bottle of hydrogen peroxide and water and mix 1 cup of 3% peroxide to a gallon of water and spray the girls down to get rid of it and it is also healthy for them as well. you can also use the same thing as fertilizer to add oxygen to the medium if using a soil or hydroponic system.
Also it helps with future issues with molda and mildew

 

[chemphlegm]

a dehumidifier/correct RH, balanced feeding schedule, proper light and temperatures is what really helps prevent this marijuana mold.

 

[abe supercro]

...use the same thing as fertilizer to add oxygen to the medium if using a soil or hydroponic system.
Also it helps with future issues with molda and mildew

Not, "as fertilizer", oxygen ok. Must correct conditions as chem mentioned. You may find that your application of hydrogen peroxide only yields temporary sterilization, PM is much more insidious once it's present. Look into inoculating plants w eagle 20 to save garden (only if in veg), but must fix conditions w air temps and movement.

 

[NaturalFarmer]

I would suggest a HEPA for maintenance as well as everything @chemphlegm said but to kill the spores use arm and hammer washing soda. Potassium bicarbonate. Same as green cure for the most part. Changes pH to an inhospitable enviro for the spores to survive.

 

[chemphlegm]

I put a brand new sulfur burner in my rooms because everyone here told me I would see mold. It killed me to think they could be right.
my fat wallet bought all the right controls, dehuey, c02, ac, fans, massive act charcoal filters24/7... all the right stuff... and I set them to the settings I found in the grow bible.Put it all together in an outdoor building and flipped the switch. i never had one mite, no plant hermies, no unexplained deaths or deficiencies. I feel like the luckiest grower here.
the sulphur burner is still brand new, never seen mold, never changed those settings since 2008

 

[Alwayslearnin]

Not, "as fertilizer", oxygen ok. Must correct conditions as chem mentioned. You may find that your application of hydrogen peroxide only yields temporary sterilization, PM is much more insidious once it's present. Look into inoculating plants w eagle 20 to save garden (only if in veg), but must fix conditions w air temps and movement.

Not engage in flower right now going into the 4th week

 

[Alwayslearnin]

Not engage in flower right now going into the 4th week

Sorry in 4th week of flowering

 

[Alwayslearnin]

a dehumidifier/correct RH, balanced feeding schedule, proper light and temperatures is what really helps prevent this marijuana mold.

My room temperature during the light on stage is 72 degrees with a humidity of 35% during the dark time my temperature is 68 degrees with 35% not sure what happened or where it came from unless it came from the Clones when I first got them but I don't think so I would have seen it long before now they are in their 4th week of flowering

 

[Alwayslearnin]

My room temperature during the light on stage is 72 degrees with a humidity of 35% during the dark time my temperature is 68 degrees with 35% not sure what happened or where it came from unless it came from the Clones when I first got them but I don't think so I would have seen it long before now they are in their 4th week of flowering

I sprayed them with a 3% peroxide mixed with a gallon of water 1 cup per gallon and now the leaves look almost as if they are bleached

 

[chemphlegm]

My room temperature during the light on stage is 72 degrees with a humidity of 35% during the dark time my temperature is 68 degrees with 35% not sure what happened or where it came from unless it came from the Clones when I first got them but I don't think so I would have seen it long before now they are in their 4th week of flowering

sorry you sprayed.

yeah, those are dry numbers for sure. maybe you right, clones given to you were infected. this might be good for you though now, because you have a chance of beating this. what I dont understand though is how mold survives in 35% RH, maybe yours is dying anyways, just residual powder on the leaves, I dunno. let us know how those bleached leaves look. plain water kills mold too, and your rh will prevent new mold, do it.

 

[Alwayslearnin]

sorry you sprayed.

yeah, those are dry numbers for sure. maybe you right, clones given to you were infected. this might be good for you though now, because you have a chance of beating this. what I dont understand though is how mold survives in 35% RH, maybe yours is dying anyways, just residual powder on the leaves, I dunno. let us know how those bleached leaves look. plain water kills mold too, and your rh will prevent new mold, do it.

No cant be dying here is what im talking about they are stunted cause i fucked with them too much and all but raped them with defoliating them at the start of week3. the mildew just started within a day or two was hard ti see when lights were on cause i have 4 1000wat hps open hoods brighy as all hell, and when i need to go in to do anything durung lights out i use a green light and cant see things like that.
the only other thing that may be fucking me is i have my cool air coming in from the outside and uts been really cold he last few nights so maybe the cold hutting the hot is creating moisture hat may have been there when i was sleeping cause i run my lights at night.
the mildew was prumarily at the bottom of the plants and they were not covered with it too to bottom. After a little bit i went in to check and the leafs look bleached and were not when i sprayed them. i mixed as directed in every article and blog i saw it in 1 cup 3% hydrigen peroxide per gallin of distilled water

 

[NaturalFarmer]

The spores were present from somewhere regardless but you over defoliating may have dropped the immune system of the plant and allowed it to set in. Seems increbibly heavy for 35%......Are you sure that is your readings at night? Whats the weather like in your area? wet?

 

[Alwayslearnin]

sorry you sprayed.

yeah, those are dry numbers for sure. maybe you right, clones given to you were infected. this might be good for you though now, because you have a chance of beating this. what I dont understand though is how mold survives in 35% RH, maybe yours is dying anyways, just residual powder on the leaves, I dunno. let us know how those bleached leaves look. plain water kills mold too, and your rh will prevent new mold, do it.

 

[Alwayslearnin]

The spores were present from somewhere regardless but you over defoliating may have dropped the immune system of the plant and allowed it to set in. Seems increbibly heavy for 35%......Are you sure that is your readings at night?

Yup pretty sure but right now ive dropped it much lower like 15% give me a minute and ill go out and take some new pics

 

[NaturalFarmer]

What is your plan with these plants?

 

[Alwayslearnin]

To smoke some and sell most but looks like ill be killing the whole crop if i dont get some eagle twenty. Im not expecting huge yield nor do i plan to be succesful on the first one. but it will be good to know how to prevent it or fix ot

 

[Alwayslearnin]

Were they are still in middle of week 4 of flower there has to be a way to fix it

 

[Alwayslearnin]

Cost is no issue just need to know how

 

[idfuckmyplants]

I don't understand how the humidity can be the same sat in the dark as it would be with 4 1000w lights on unless you had a dehumidifier set to that ?

 

[Alwayslearnin]

I don't understand how the humidity can be the same sat in the dark as it would be with 4 1000w lights on unless you had a dehumidifier set to that ?

Just the opposite i have a humidifier et to that, the room is in my shed and my exaust was pulling all the moisture out. when i first noticed it the second week of veg the leaf were lookin pretty ratty cause the rh was around 15% sometimes lower. i tried a small humidifier ut it couldnt keep up with the exaust