Systemic Mildew

Zootime

Zootime

Well-Known Member
So my girls got this shit 3 weeks away from harvest cos RH was at 75 near the base of the pots.

I found white blotchy fuzzy spots on a few of the fan leaves.

I managed to get the humidity down to 63 and sprayed them. So will the flowers be good to smoke if I can keep it at bay?

reason I ask is because I know mildew is systemic, so its inside the plants cells something like herpes...
 
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ogreballerina

Well-Known Member
If it's not in the bud, it's still good.

Anywhere from 40 to 60 % percent of the bud you've ever smoked has probably been treated for PM at least once in it's life.

Treating it ( misting affected areas..including buds ) with high PH water with a few drops of Neem will keep it at bay.

If the thought of misting the bud is abhorrent to you ( due to high RH ) you can use a airbrush or just a regular brush to paint the leaves with above solution.

PH must be 8.2 or higher.

Dehumidifiers are worth their weight in gold. Your RH is still too high.

35 % would be ideal this late in flower.
 
dvs1038

dvs1038

Well-Known Member
If its a systemic problem spraying the plant wouldn't really do anything would it? Systemic means the problem is inside the plant, treating the outside won't help it, but if its powdery mildew then yeah the neem oil will work, I've heard of milk diluted with water sprayed on the plants will help treat mildew also, but if its systemic it could be root rot or sumptin like that H2O2 can help with that either just the reg stuff(3%) from ur market or u can get stronger concentration at hydro shops I think.

This is a pic of one of my plants that got some root rot when I was growing outside from too much damn rain. systemic.jpg
 
Zootime

Zootime

Well-Known Member
dvs1038 said:
If its a systemic problem spraying the plant wouldn't really do anything would it? Systemic means the problem is inside the plant, treating the outside won't help it, but if its powdery mildew then yeah the neem oil will work, I've heard of milk diluted with water sprayed on the plants will help treat mildew also, but if its systemic it could be root rot or sumptin like that H2O2 can help with that either just the reg stuff(3%) from ur market or u can get stronger concentration at hydro shops I think.

This is a pic of one of my plants that got some root rot when I was growing outside from too much damn rain. View attachment 2116173
Click to expand...
Powdery mildew is systemic. And NOW its spreading all over my plants!!!! 3 weeks away from harvest I don't know what to do!!!!!
 
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OmNomEdibles

Member
im having a similar problem, the spots seem to stay on the lower fan leaves which i continuously clip, ive added an extra fan to keep circulation and leave the active carbon filter on all night again for more circulation, i need to find out how to either remove more moisture from the tent or warm the room up without causing humidity, anyone have any suggestions, im not very fond of the idea of spraying.
 
Zootime

Zootime

Well-Known Member
OmNomEdibles said:
im having a similar problem, the spots seem to stay on the lower fan leaves which i continuously clip, ive added an extra fan to keep circulation and leave the active carbon filter on all night again for more circulation, i need to find out how to either remove more moisture from the tent or warm the room up without causing humidity, anyone have any suggestions, im not very fond of the idea of spraying.
Click to expand...
I'm gonna use some H[SUB]2[/SUB]O[SUB]2 and hope that keeps it at bay till harvest. At this point I can't see theirs anything more I can do. Gonna get a small humidifier when I can though. [/SUB]
 
Chronic Indica

Chronic Indica

Active Member
Zootime said:
Powdery mildew is systemic. And NOW its spreading all over my plants!!!! 3 weeks away from harvest I don't know what to do!!!!!
Click to expand...
The dreaded powdery mildew! hey, at least it's not mold. I had PM growing on my leaves last grow 3 weeks before harvest. Sprayed it down with organicide( sesame oil mixed in water with other organic material to make a higher ph) every other day and it seemed to keep it at bay. Spores won't grow at anything below 35% humidity. If you're grow room has a high humidity I would suggest watering in the morning or when lights come on. Dehumidifiers are always the best way to go. Also make sure you have VERY good ventilation. Spraying it down was a bitch but hey, it never reached my buds. :bigjoint:
 
lahadaextranjera

lahadaextranjera

Well-Known Member
Ok, Mildew likes cold temps and high RH. You need the RH below 60%. Keep the temp above 20 degrees C at night and let them dry out a bit.#

Use Neem oil or milk to spray on the leaves. Take off really sick leaves and get ready to harvest early.
 
K

kathie420

Member
Had the same problem. I kept the humitdity below 45 for the last 4 weeks of flowering and sprayed with peroxide and water.
 
J

jcmjrt

Well-Known Member
I recently encountered the same issue. I did some searches and first tried baking soda in water sprayed on the leaves. The ph of the leaf becomes slightly hostile to powdery mildew. That kept the powdery mildew basically in check but didn't knock it out and I repeated treatment a few times. This is my first organic grow and I've started reading about compost tea. Someone sprayed it on their leaves and apparently the bacteria from the compost tea compete effectively with the powdery mildew. I applied a very basic 18 hour earthworm casting, seaweed and molasses compost tea to the leaves by spray misting all over the plant - top and bottom. That was three weeks ago and the powdery mildew seems to be gone. I'm happy so far and wouldn't hesitate to spray the leaves again with the completely organic compound.
My compost tea maker is nothing special but seems quite effective - I read about a diy one and made it with 5 gallon bucket, paint strainer and aquarium air pump with stones. I think the whole thing was about $40 and I bought everything new at the store.
 
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OmNomEdibles

Member
jcmjrt said:
I recently encountered the same issue. I did some searches and first tried baking soda in water sprayed on the leaves. The ph of the leaf becomes slightly hostile to powdery mildew. That kept the powdery mildew basically in check but didn't knock it out and I repeated treatment a few times. This is my first organic grow and I've started reading about compost tea. Someone sprayed it on their leaves and apparently the bacteria from the compost tea compete effectively with the powdery mildew. I applied a very basic 18 hour earthworm casting, seaweed and molasses compost tea to the leaves by spray misting all over the plant - top and bottom. That was three weeks ago and the powdery mildew seems to be gone. I'm happy so far and wouldn't hesitate to spray the leaves again with the completely organic compound.
My compost tea maker is nothing special but seems quite effective - I read about a diy one and made it with 5 gallon bucket, paint strainer and aquarium air pump with stones. I think the whole thing was about $40 and I bought everything new at the store.
Click to expand...
so let me get your recipe correct

earthworm castings, seaweed, and molasses? please do share how much to put in to the compost tea maker.
 
Chronic Indica

Chronic Indica

Active Member
Forgot about cold temps, make sure the temp is at least 72 degrees F when lights are on and try to keep night temps at nothing below 65 degrees F.
 
J

jcmjrt

Well-Known Member
It's just a very basic compost tea recipe. I used about a cup of castings, a tsp of dr earth seaweed concentrate and 2 tsp of unsulphured molasses to my 5 gal compost tea maker and started it going. I pulled a pint of water out of my compost tea maker after 18 hours. I added a tsp of molasses to the compost tea maker to make sure the bacteria had plenty to keep eating and let the compost tea go to about 48 hours and watered my plants with it. The reason I pulled the pint after 18 hours is because that is what i had read someone else had done to get rid of mildew. It worked and I am happy; it's really hard to believe how easy and how effective it is.
 
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