Powdery mildew

[StonedGardener]

Regalia CG is a preventative not a killer. It's recommended before PM pays a visit

 

[StonedGardener]

i was foiliar feeding potassium silicate and h202 solution that has a ph of 9.8

i sprayed every other day and had not seen any until i stopped spraying due to laziness

im just gonna toss it

so in other words, i dont have any real good advice for you

 

[StonedGardener]

You may be on right track using silica. An article on the web maybe very helpful to anyone with PP. It's called "What to do about powdery mildew" maximumyield.com.

 

[StonedGardener]

There are several threads here talking about PM and treatments....One of the best products I found, l IMO, and all certified organic is Regalia CG.

Looking at the data, composition, MSDS specs., etc., it appears safe ( I'm a skeptic). Indoor use is tricky......don't be breathing that! By the way, if you did not know, this product is a preventative vs. a curative.......you may like web article "What to do about powdery mildew" maximum yield.com. I'm battling this shit too. I'm trying heat treatments at the moment. I'm spraying/misting water often also because PM spore can't germinate on wet leaf. I'm rambling, apologies.

 

[Gemtree]

Glad I got a couple gallons of regalia for 50 a piece on ebay when someone was selling them cheap. I had to tear everything down when I had pm nothing worked

 

[Hobbes]

.

I got powdery mildew 3 grows ago, came in on a clone. I tried several methods of killing the stuff and nothing worked until I bought a Reactive Oxygen Species generator.

My current grow was showing PM spots on the lower leaves, I'd pluck them and the spots would show up on another leaf. Nothing worked, I had my AirROS hooked up but my airflow was poor at the bottom of my plants.

I installed a monkey fan in each corner, below the canopy, one for each of the four plants. The white PM spots went away over night and I haven't seen them in 3 weeks now.

They're expensive but if you're serious about getting rid of your PM I'd recommend one. Renfro has a thread about them, where I learned of them.

.

Control odor & sterilize your room air + surfaces 24/7 + eliminate PM

Ok folks, hear me now and thank me later. This is for the more commercially minded growers out there who want to control odor AND prevent any issues with mold / mildew / bacteria. https://www.airrosbysage.com/ This device uses a sensor to maintain proper levels of ozone and 7 different...

www.rollitup.org

.

 

[PJ Diaz]

.

I got powdery mildew 3 grows ago, came in on a clone. I tried several methods of killing the stuff and nothing worked until I bought a Reactive Oxygen Species generator.

My current grow was showing PM spots on the lower leaves, I'd pluck them and the spots would show up on another leaf. Nothing worked, I had my AirROS hooked up but my airflow was poor at the bottom of my plants.

I installed a monkey fan in each corner, below the canopy, one for each of the four plants. The white PM spots went away over night and I haven't seen them in 3 weeks now.

They're expensive but if you're serious about getting rid of your PM I'd recommend one. Renfro has a thread about them, where I learned of them.

.

Control odor & sterilize your room air + surfaces 24/7 + eliminate PM

Ok folks, hear me now and thank me later. This is for the more commercially minded growers out there who want to control odor AND prevent any issues with mold / mildew / bacteria. https://www.airrosbysage.com/ This device uses a sensor to maintain proper levels of ozone and 7 different...

www.rollitup.org

.

Airflow is definitely key in fighting PM. I have 4 fans on the floor of a 4x4 tent, 2 blowing up and across the center, and 2 more at opposite corners, pointed up and towards the wall to create a vortex type breeze.

 

[Chunky Stool]

Don't forget the CHEPA™

What did you accomplish today?

I bought the same tire that came stock with the car and it wasn't cheap. I always try to buy tires as sets of fours but if I can't I buy them in pairs. If it's because of some type of damage my warranty on the tire doesn't cover I retire the partly used tire to full spare. I hate donut spares...

www.rollitup.org

 

[SnoopyDoo]

I've heard of that stuff from Annie, sounds great. I just looked it up on Amazon, and it seems hella pricey. I use Immunox by Spectracide, best stuff I've tried. My moms are in a tiny DYI tent, and they are jammed in there pretty tight. Before this product, they were constantly getting a variety of fungal infections (black spot, rust, pm, etc.) Now I just spray them every two weeks (just after taking clones) before I put them back in the tent. No infections at all anymore (it is systemic). It is super concentrated, one $15 bottle lasts me over 3 years. Just a cheaper alternative.

Amazon.com : Spectracide 100507462 Immunox Multi Purpose Fungicide Spray Concentrate, 16 fl oz, Yellow : Eagle Fungicide : Garden & Outdoor

Amazon.com : Spectracide 100507462 Immunox Multi Purpose Fungicide Spray Concentrate, 16 fl oz, Yellow : Eagle Fungicide : Garden & Outdoor

www.amazon.com

Also a Immunox fan.

 

[SnoopyDoo]

That stuff works (same stuff that's in Eagle20), but it's a nasty systemic pesticide, which stays in your plants for a long time, as it has a half-life of 64 days. I wouldn't use it on consumable crops.

You should be using it before you flip. You gotta go organic once flowering starts. Rosemary is a good organic essential oil for insects or fungus.

 

[Budzbuddha]

Look for BANISH ( Geraniol ) it will kill and inhibit Powdery Mildew ....

 

[PJ Diaz]

You should be using it before you flip. You gotta go organic once flowering starts. Rosemary is a good organic essential oil for insects or fungus.

It will still be there come harvest time, even if you only treat the plant once as a clone. Half-life means that half of the pesticide is still present come the half-life time (64-days in this case). In 64 more days, it's half that again, so even a plant you veg for 2 months and then flower for two more will still have 1/4 of the residual systemic pesticides.

 

[Chunky Stool]

I've recently learned a lot about PM... grr

Is it "systemic"?
No, but it feels that way.

By the time you actually notice PM, the spores are already everywhere. So yes, it looks like the infection has moved through the plant to a different spot, but that's not what actually happens. It's just a new lesion that was started by spores on the leaf surface.

AND (it gets worse)

Plants that have PM infections are in a weakened state so they are more vulnerable and can be overwhelmed. Watch for other pathogens and pests. Bugs are drawn to weak plants.

Infected plants will also show stunted growth until the infection is gone but they can recover.

The best way to sterilize the area is with copious quantities of ozone. Remove everything that breathes air, then nuke it.
This will get into all the nooks and crannies. Leave everything running, fans, dehumidifier, etc.
It also kills pests like thrips, gnats, mites, etc.

If you're in late flower, chop em and hope for the best. Then treat any veg plants with K bicarb and neem (alternate to prevent tolerance).
Older plants can be given regalia to strengthen them and biologicals like serenade and southern ag GFF to colonize the leaves with benes.

Be careful out there...

 

[manfredo]

I've recently learned a lot about PM... grr

Is it "systemic"?
No, but it feels that way.

By the time you actually notice PM, the spores are already everywhere. So yes, it looks like it the infection has moved through the plant to a different spot, but that's not what actually happens. It's just a new lesion that was started by spores on the leaf surface.

AND (it gets worse)

Plants that have PM infections are in a weakened state so they are more vulnerable and can be overwhelmed. Watch for other pathogens and pests. Bugs are drawn to weak plants.

Infected plants will also show stunted growth until the infection is gone but they can recover.

The best way to sterilize the area is with copious quantities of ozone. Remove everything that breathes air, then nuke it.
This will get into all the nooks and crannies. Leave everything running, fans, dehumidifier, etc.
It also kills pests like thrips, gnats, mites, etc.

If you're in late flower, chop em and hope for the best. Then treat any veg plants with K bicarb and neem (alternate to prevent tolerance).
Older plants can be given regalia to strengthen them and biologicals like serenade and southern ag GFF to colonize the leaves with benes.

Be careful out there...

Sorry you are experiencing this...Very sorry!! It is soul crushing!! The good news is you will be a better grower for it in the long run!!

For me, even the use of an ozone machine didn't work...and I learned ozone can be very dangerous...It can damage your lungs so be careful and research it first. Now I use my ozone machine for cleaning smelly vacant rentals.

Regalia was my savior, and I use it at a very young age...seedlings and/or week old or clones of that age get treated and thrive...I also use Marrones Venerate for pests, also starting at 1 week of age.

Anything already infected, throw it away...If they are in flower and you want to try to save them, you can wash the buds at harvest with peroxide

I think it costs me about $10 a week for Venerate, Regalia and silica, and makes a great preventative ....andf the Venerate and Regalia are certified organic, if that matters to you.

 

[JimmiP]

I've recently learned a lot about PM... grr

Is it "systemic"?
No, but it feels that way.

By the time you actually notice PM, the spores are already everywhere. So yes, it looks like it the infection has moved through the plant to a different spot, but that's not what actually happens. It's just a new lesion that was started by spores on the leaf surface.

AND (it gets worse)

Plants that have PM infections are in a weakened state so they are more vulnerable and can be overwhelmed. Watch for other pathogens and pests. Bugs are drawn to weak plants.

Infected plants will also show stunted growth until the infection is gone but they can recover.

The best way to sterilize the area is with copious quantities of ozone. Remove everything that breathes air, then nuke it.
This will get into all the nooks and crannies. Leave everything running, fans, dehumidifier, etc.
It also kills pests like thrips, gnats, mites, etc.

If you're in late flower, chop em and hope for the best. Then treat any veg plants with K bicarb and neem (alternate to prevent tolerance).
Older plants can be given regalia to strengthen them and biologicals like serenade and southern ag GFF to colonize the leaves with benes.

Be careful out there...

I second the potassium bicarbonate! Mix it with silica if you want too.

 

[Chunky Stool]

Sorry you are experiencing this...Very sorry!! It is soul crushing!! The good news is you will be a better grower for it in the long run!!

For me, even the use of an ozone machine didn't work...and I learned ozone can be very dangerous...It can damage your lungs so be careful and research it first. Now I use my ozone machine for cleaning smelly vacant rentals.

Regalia was my savior, and I use it at a very young age...seedlings and/or week old or clones of that age get treated and thrive...I also use Marrones Venerate for pests, also starting at 1 week of age.

Anything already infected, throw it away...If they are in flower and you want to try to save them, you can wash the buds at harvest with peroxide

I think it costs me about $10 a week for Venerate, Regalia and silica, and makes a great preventative ....andf the Venerate and Regalia are certified organic, if that matters to you.

You're right about ozone, that's why it's important to remove anything that breathes air before running it.
Since I was going to chop anyway, I blasted my plants with O3 before spraying with "Freq Wash" that I picked up on clearance for $5/gallon.


Fingers crossed.

Right now I'm running an experiment with my seedlings that were exposed to PM. (I know that some got infected because I saw it on the stems.)
If they were my homegrown seeds I'd just toss em and start over.
Unfortunately, I've got at least $300 invested and would love to save them if possible.

Yesterday I sprayed with K bicarb.
Tomorrow I'll spray with neem.

They are very small so I haven't given them regalia but may do a half dose when they are ready to be fed again.

Got three CHEPA™ filters running so hopefully any new spores will be caught before they spread.

 

[manfredo]

You're right about ozone, that's why it's important to remove anything that breathes air before running it.
Since I was going to chop anyway, I blasted my plants with O3 before spraying with "Freq Wash" that I picked up on clearance for $5/gallon.
View attachment 4822072

Fingers crossed.

Right now I'm running an experiment with my seedlings that were exposed to PM. (I know that some got infected because I saw it on the stems.)
If they were my homegrown seeds I'd just toss em and start over.
Unfortunately, I've got at least $300 invested and would love to save them if possible.

Yesterday I sprayed with K bicarb.
Tomorrow I'll spray with neem.

They are very small so I haven't given them regalia but may do a half dose when they are ready to be fed again.

Got three CHEPA™ filters running so hopefully any new spores will be caught before they spread.

You can actually dip your seedlings in a Regalia mix...mix up the normal 30 ml per gallon, and submerge them red cup (or whatever) and all for like 10 seconds before transplanting . You might save them...Good luck!!

 

[SnoopyDoo]

It will still be there come harvest time, even if you only treat the plant once as a clone. Half-life means that half of the pesticide is still present come the half-life time (64-days in this case). In 64 more days, it's half that again, so even a plant you veg for 2 months and then flower for two more will still have 1/4 of the residual systemic pesticides.

Yeah, but it won't be in the buds.

Nevertheless, I prefer mixing up my own essential oil cocktails, but that works more as preventative measure. Sometimes when something is well established in the garden, you have to take more serious steps.

 

[SnoopyDoo]

I would. Consumption is not the same as combustion, and combustion assures you’ll get fragments of myclobutanil in the smoke, and I’m betting against their safety. Regalia is pricy, but it makes for weed that is safe to smoke.

I'll have to give Regalia a shot next time I'm having issues.

 

[PJ Diaz]

Yeah, but it won't be in the buds.

Yes it absolutely will. It's a systemic pesticide.