I've been hit with powdery mildew help..

mrduke

Well-Known Member
so about a week ago i found some PMon one of my plants. of course it was the day before i left town for a 4 day weekend. when i got home i went straigh to the grow shop and got a sulfur burner filled 'er up and ran it for 2 hours my room is 5x10x8, is that long enought? it says 4 hours for up to 1000sq ft.

also how do you know when you have killed the fungus? does it go away?

I read that the sulfur will leave a powder on leafs? hows it different then the look of PM?

let me know what you think any advice is great thanks:clap:
 

mrduke

Well-Known Member
will serinade burn leafs if i use it with a sulfur burner?
do you spray lights on or off?
 

PurfectStorm

Well-Known Member
will serinade burn leafs if i use it with a sulfur burner?
do you spray lights on or off?
always lights off..and they both wont work. Sulphur inhibits microbial growth, and serenade is bacteria based, so one ore the other.

I feel your pain, im runnin thru the same issues right now, 6 days into my PM problem.

:peace:out.
PurfectStorm
 

mrduke

Well-Known Member
always lights off..and they both wont work. Sulphur inhibits microbial growth, and serenade is bacteria based, so one ore the other.

I feel your pain, im runnin thru the same issues right now, 6 days into my PM problem.

:peace:out.
PurfectStorm
what are you useing? i'm doing my 3rd burn today we'll see how they look in 12hours. thanks for your input storm
 

PurfectStorm

Well-Known Member
Im using Serenade spray, and so far its keeping them at bay, but as somebody else told me, PM is like herpes for the mj plant, all you can do is control the outbreaks. I used it twice about a week ago, and it seemed to knock it back some.

Serenade smells like shit (so does sulphur) but i'm hopin it will do the trick.

:peace:out.
PurfectStorm
 

The Good Doctor

Active Member
You can spray light on or off doesn't matter no matter what people say, at least not on OG.

One thing, at full strength I serenaded my whole crop like literally 20 times. I used around 4 gallons throughout the run. Im thinking of changing its name from OG to Serande #2. . . lol. Unless if you catch it when its almost nothing, seranade just make the mold move around/mildew move around.

I have a sulfur question, how close to picking can I burn it, and not effect the plants flavor?
 

PurfectStorm

Well-Known Member
You can spray light on or off doesn't matter no matter what people say, at least not on OG.

One thing, at full strength I serenaded my whole crop like literally 20 times. I used around 4 gallons throughout the run. Im thinking of changing its name from OG to Serande #2. . . lol. Unless if you catch it when its almost nothing, seranade just make the mold move around/mildew move around.

I have a sulfur question, how close to picking can I burn it, and not effect the plants flavor?
You can spray lights on, but if you're using HID prepare for some serious light refraction and burns on your plant...
 

mrduke

Well-Known Member
How do you know when the mildew is dead or gone? does is disapeare or do you have to trim the infected areas off?

How many times do i need to burn sulfur for I've done it 3 times in 5 days? SHould i stay with every other day for awhile?
 

vapedg13

New Member
How do you know when the mildew is dead or gone? does is disapeare or do you have to trim the infected areas off?

How many times do i need to burn sulfur for I've done it 3 times in 5 days? SHould i stay with every other day for awhile?
PM is freakin herpes for weed....you can control it but it always comes backkiss-ass

Powdery Mildew (PM) is a systemic problem coming from within an infected plant. What you are seeing (the white powderey looking substance) on the leaves is the flowering body of the fungus- the hyphae live within the plant. By the time you can visually identify the problem it's already well established within the plant. No external treatment (like sulphur) can fix the problem.

PM proliferates in shaded and low-light areas of gardens where the humidity is raised; obviously countering these grow room conditions will slow the spread but it won't truly eliminate the fugus from the plants.

The same is true for sulphur applications; be it from a sulphur burner or from a solution such as Safer's Defender. Sulphur will prevent the growth of PM where it is present on the leaf, but the PM still exists within the plant.... not to mention sulphur applications negatively affect the taste of the final product; it seems to concentrate on the resins and an experienced or trained palate will always be able to tell if there was sulphur applied to the plants from how the hash smokes. I don't recommend using sulphur on vegging for flower or flowering plants

There is a product called Meltatox that is designed for application on ornamentals which gets into the plant and actually kills the PM. You should not spray this on plants that are going to be put into flower, or are in flowering. However, IMO it can safely be used to treat your veg state plants to eliminate the PM from your stock. I would suggest waiting at least 4 weeks before taking clones to be put into a veg/flower cycle.

Of course the MSDS is available online and anyone considering using the product should completely read the label instructions to inform themselves about the factors involved, how to properly spray and what precautions to take, the product half-life, etc before considering using.

It does work IME, and can be used as a part of a integrated approach that not only deals with eliminating all traces of spores from the growroom, but also removing the fungus from the plants themselves. Having either infected plants OR a spore infected growroom will ensure the problem persists as one will infect the other.

I would remove the plants, clean the room with industrial greenhouse cleaner, and use a sulphur burner before putting the plants back in the room. Then separately cut back the mothers and sterilize with Meltatox. If the plants are for consumption I'd then wait a month before getting back on schedule to take clones and veg out for the next crop... any remaining Meltatox in the plants would be negligible.

This product is not for everyone and is not safe to spray on flowering plants for consumption. I only recommend it's use to those that will use it responsibly and make themselves aware of the MSDS information available before choosing to use it.

Sulphur inhibits the growth on a cellular level by interfering with biological processes opf the fungus this is also well documented on the scientific literature.

A higher pH spray does help to slow the fungal growth, but this is not the reason sulphur and potassium bicarbonate are used to combat PM.



this product works really good..... www.greencure.net ....ODERLESS....up to 14 days inbetween aplications...ORGANIC...Can be used up to harvest.:peace:

 

FLoJo

Well-Known Member
i have seen a product called eagle ew20 used on some mothers recently and it has killed the pm... its a systemic fungicide that is available to be purchased by consumers.. meltatox is not you have to have an ag license from what i have seen....

a flowering session is about to be ended, all debris will be removed, all trashed discarded, all rooms cleaned, and all mothers will be taken out and drenched with the eagle ew20, as well as the new batch of clones going in... we shall see how well it works.. pm is an evil evil demon from fungus hell
 

FLoJo

Well-Known Member
yes.. it is an airborne fungus... the white stuff you see is the reproductive organ of the fungus, and releases spores into the air.. raise temps, lower humidity, and treat the entire crop
 

vapedg13

New Member
I have PM on 3 of my 25 plants. Is it transferable from plant to plan...t?
I never had pm until i was given a clone with it ....Yes it spreads on to other plants ...some strains are pm resistant like bubba kush ...white widow

Meltatox is only available to licensed pesticide applicators (which I am a commercially licensed)


have seen a product called eagle ew20 used on some mothers recently and it has killed the pm... its a systemic fungicide that is available to be purchased by consumers.. meltatox is not you have to have an ag license from what i have seen....
Where are links to this product?? Where can you get Eagle EW20
 

DTR

Active Member
so the sulphr will just effect the taste? im a bit over 2weeks into flower and sprayed with sulphur 10 days ago after removing the leafs with signs of pm
 

vapedg13

New Member
so the sulphr will just effect the taste? im a bit over 2weeks into flower and sprayed with sulphur 10 days ago after removing the leafs with signs of pm
Sulfur is ok to use until the last 3-4 weeks of flower then stop...use Greencure... ITS ODERLESS...NO TASTE OR SMELL... CAN BE USED UP TO 1 HOUR BEFORE HARVEST

I like greencure...you dont have to spray the entire plant....just the PM where you see it...spray it... its gone... that quick:hump:
 

jonnyquest

Well-Known Member
your all wasting your money and time, MILK MILK MILK MILK MILK, milk will take care of all your powdery mildew problems, look it up
 

Thestinker

Active Member
I think i may have PM on my 1 of my young clones it seems to have increased alot over the last few days but im sure how to identify it any one have any reference pics? the clone is only a week and a half old and has started new growth whats this shit gonna do to my plants?
 

vapedg13

New Member
your all wasting your money and time, MILK MILK MILK MILK MILK, milk will take care of all your powdery mildew problems, look it up
Ya bro... milk works(1/3 cup to 32 oz water) so does 3 % hydrogen peroxide (1/4 cup to 32oz) but you have to reapply every 3-5 days ....greencure has a 2 week interval





I think i may have PM on my 1 of my young clones it seems to have increased alot over the last few days but im sure how to identify it any one have any reference pics? the clone is only a week and a half old and has started new growth whats this shit gonna do to my plants?
Looks like white dust


 

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