Powdery Mildew: Info and control
- Thread starter BH
- Start date
- Status
Info and control suggestions coming soon!
great links:
Control Powdery Mildew on Cannabis | AiroClean420
Learning how to control powdery mildew on cannabis is a critical skill for any marijuana producers.www.airoclean420.com
How to Treat And Cure Powdery Mildew on Cannabis | Trifecta
Treat and cure powdery mildew on cannabis, naturally!www.trifectanatural.com
Powdery Mildew Prevention and Treatment in Commercial Cannabis Cultivation - Nano Grow Max
Whether small-scale growers in grow tents or large-scale producers with acres of greenhouse space, both are vulnerable to the same pathogenic threat: powdery mildew (Powdery Mildew). This fungus is a plague for all types of cultivators, who labor in a variety of different environmental...nanogrowmax.com
6 Ways to Cure Powdery Mildew on Cannabis Organically - Mold Resistant Strains
Ultimate guide to powdery mildew cures. How to get rid of powdery mildew on cannabis fast during veg or flowering. The best organic methodsmoldresistantstrains.com
Powdery Mildew on Cannabis
Powdery mildew on cannabis is extremely common for both indoor and outdoor growers. When growing marijuana, powdery mildew is very common.cannabistraininguniversity.com
Awesome information, resources! Thx!
Willie
🍓 Crush Genetics 🍓
That has worked so well for me, I've yet to see the pm come back. I suffered trying to battle it prior to getting the sprayable sulfur. 100% gone and it hasn't been back. For a while, you keep looking over your shoulder for it....but the sulfur stops it. It has to be sprayable sulfur to have a shot at mixing it with water...plain chemical sulfur does not mix with water.
Thx for the tip!
Frosty78
Habitabat autem somnium
Great write up @BH
Alot of time and effort put in, well done.
I've looked at that lost coast plant therapy.
They touch on the citric acid in their product stabilises the ph of the leaves/ph. They have IPA in theirs which I think is to help dry off the moisture and reckon you can spray right up to harvest without danger. Have you heard of that?
Would garlic/onion (allium family) help in a spray? Both have high anti fungal properties.
I've made a batch up with the following just incase shit hits the fan, but great for pests too I've found on my veggies.
Splash of olive oil about 30ml (sunflower and.others would suffice. Just what I had kicking around) smothers the air breathing bugs.
Ground chilli pepper two teaspoons (again anti fungal but I think the capsaicin also makes life not enjoyable for bugs)
Minced garlic 1 tablespoon (what I had kicking around)
Left over ends of brown onion after I made some dinner
Apple cider vinegar, about 50ml
Two teaspoons vinegar.
10ml ipa
2 teaspoons dishwasher liquid as a wetting agent /surfactant.
2 teaspoons cinnamon again anti fungal and makes it smell a bit nicer lol
I could add baking soda but I don't believe in acid base in my mixes (we aren't making speed or meth till death here) one mix of the above with one, the other is with the other will hopefully work
I let my sit a percolate after mixing for 24hrs
I'm always reticent to foliar spray outdoors from afterc4-5weeks flower. If one can make organically what's around the house I'm always up for that.
Alot of time and effort put in, well done.
I've looked at that lost coast plant therapy.
They touch on the citric acid in their product stabilises the ph of the leaves/ph. They have IPA in theirs which I think is to help dry off the moisture and reckon you can spray right up to harvest without danger. Have you heard of that?
Would garlic/onion (allium family) help in a spray? Both have high anti fungal properties.
I've made a batch up with the following just incase shit hits the fan, but great for pests too I've found on my veggies.
Splash of olive oil about 30ml (sunflower and.others would suffice. Just what I had kicking around) smothers the air breathing bugs.
Ground chilli pepper two teaspoons (again anti fungal but I think the capsaicin also makes life not enjoyable for bugs)
Minced garlic 1 tablespoon (what I had kicking around)
Left over ends of brown onion after I made some dinner
Apple cider vinegar, about 50ml
Two teaspoons vinegar.
10ml ipa
2 teaspoons dishwasher liquid as a wetting agent /surfactant.
2 teaspoons cinnamon again anti fungal and makes it smell a bit nicer lol
I could add baking soda but I don't believe in acid base in my mixes (we aren't making speed or meth till death here) one mix of the above with one, the other is with the other will hopefully work
I let my sit a percolate after mixing for 24hrs
I'm always reticent to foliar spray outdoors from afterc4-5weeks flower. If one can make organically what's around the house I'm always up for that.
Ramjet159
pHeno pHisher
Dunno if that mix list you got works but it looks like a great base for my next seafood marinara ????
Frosty78
Habitabat autem somnium
Worked on my veggies with powdery mildew, and pests this year. I'm going to try it, first sign of mold or pm. Last year lost a couple of colas at the end and pulled a week early in melb from deluge. Bush was Mickelson mouse weather. This year it's other way around. Mother nature what us her problem with me lol
Ramjet159
pHeno pHisher
I’m hearing you . Last couple summers non existent pretty much. This summer rain followed by more rain . I fields never turned brown and dry . What will next year bring ? Maybe a Cyclone along our south coast ?
Willie
🍓 Crush Genetics 🍓
The protocol for me was to spray the sulfur during veg only. By the time it flowers there is NO PM. You would have to re-introduce the PM to your grow to get it again. I have never seen PM on a plant that I treated before flowering. I've got 100% success rate going thus far and in fact there is no PM here at all since I wiped out the initial problem.........and it was haunting/dogging my grows in one tent for a bit.can't find a updated approval list, cali used to have a. easy to find approval brand and pesticides/fungi u could use. other states do
another factor is even if it says it can be used as "yes" if you read more into majority of the rules it still says u must follow the manuals instructions for cannabis. many brands state u can't go a certain amount of time or limits of w.e. just saying a lot of the "yes" and approved, still can't use it a lot of the time in flower or certain times/mixes.
colorado:
Pesticide Use in Cannabis Production Information | Department of Agriculture
The Colorado Pesticide Applicator Act prohibits use of a pesticide in a manner inconsistent with the product labeling:35-10-117(1)(i)C.R.S.: unless otherwise authorized by law, it is unlawful and a violation of this article for any person to use, store or dispose of pesticides, pesticide...ag.colorado.gov
cali
California pesticide-use rules for cannabis demystified
www.cdpr.ca.gov
I agree sulphur is a great option for veg stage/early flower but also big ag veggies & misc gardening. it just has its negatives unfortunately
ether way on allowable brand or thing if you can't use it after 3rd week of flower for prevention and treatment ( sulphur is in that limits and has many compatibility issues ) and that's a major issue for prevention in many regions outdoors.
using a beneficial fungi/bacteria(example:cease or SABF) and SAR (like regalia ) till harvest prevention and treatment for pm/molds . key is healthy plants and to never allow the surfaces of the plant to have colonies of pm and mold. you see it too late and the key just like pest is treatment whole cycle and knowing this problem/issue is always something to keep on.
for indoors a good air filter and purifier/uv treatment is a huge improvement since so many negatives are in the air u can easily reduce and if not remove entirely .
What are sulfur's negatives?
This is awesome stuff, thx for sharing!Pm exists in all air even with good airflow the key is not allowing pm to be able to colony on the leaf, the big key is to prevent it to ever becoming allowable to infect the plant , the best combo for a prevention and treatment is having SAR, a good biological fungi defense , good airflow , good air filter to clean it in the room.key is clean air just like if you had contaminates in water . Another neglected thing is trying to grow with unhealthy plants or the enviroment is making them weaker, this gives the pest or molds a huge advantage in wanting and winning to attack ur plants.. another fact is It’s the age of a plant by age like everything lose their natrual defense and adding a extra boost and defense of SAR/ bacteria defense can truly save ya crop every time ( ever since I started being more proactive on these protocols I’ve saved soo much in % of all crops ). Like guide stated above once you see it (pm) that pm that’s always been in your room Inless your cleaning the air/filtering it has taken hold of ur plant and started a colony ( key is remeber pm isn’t systemic). this is why I suggested applying biofungicides + SAR biofungicides like regalia which are cheap and proven effective against these diseases than just one product defense/plan , these options are safe and will not allow the molds to colony and grow there Plus they are safe and approved to be used till end of harvest. The SAR (regalia ) will promote a defense for up to 14 days and this is a huge thing for people outdoors that in rain season , so many products they will need to be reapplied after rain where this is every 7-14 days and u can spray it a hr before the rain and know it will be SAR and protecting inside for up to 14 days
“Powdery mildew is a scourge to agricultural producers everywhere. This white, powdery fungus first begins to appear on plant leaves before spreading to affect stems, buds, and roots. Eventually, the entire plant succumbs to powdery mildew infection. Marijuana powdery mildew problems are endemic in many grow rooms. Achieving a higher air quality in your cannabis production area will dramatically reduce the risk of marijuana powdery mildew problems.
Most Marijuana Producers Mistakenly Prioritize Air Circulation over Air Purity
The use of grow lights is necessary to achieve the light-dark cycle needed for optimal cannabis plant health. Unfortunately, even with the best grow light technology, these lights throw off a lot of heat. To compensate for this heat production, many marijuana growers make use of large barn fans. These fans circulate air throughout a grow room, decreasing heat production from grow lights. Fans have the added benefit of reducing humidity that can gather between plants placed close together. This may keep humidity to more acceptable levels for cannabis growth.
The downside to this air circulation system is that it also spreads airborne pathogens around a growing environment. If one plant suffers exposure to marijuana powdery mildew, soon the entire grow room also suffers exposure to fungal spores. Despite this, many growers continue to use fans and other air circulation devices. These represent a significant threat to air quality and your resulting marijuana crop.
An Air Purification System Decreases Marijuana Powdery Mildew Problems
How, then, can growers achieve the pure air needed to keep plants safe from marijuana powdery mildew? The answer lies not in air circulation, but air purification. Air circulation simply means that air is being passively moved around an environment. Air purification is an active process by which pathogens are destroyed, improving the ambient air quality. By purifying the air, you can reduce or completely eliminate plant exposure to powdery mildew spores that can have a catastrophic effect.”
Marijuana Powdery Mildew and How Clean Air Can Help | AiroClean420
Managing marijuana powdery mildew is essential to ensure the quality of your cannabis product. Achieving excellent air quality is possible.www.airoclean420.com
Willie
🍓 Crush Genetics 🍓
I will get some Regalia for the outdoor this year.....a 14 day window, rain or shine is huge, especially here.Pm exists in all air even with good airflow the key is not allowing pm to be able to colony on the leaf, the big key is to prevent it to ever becoming allowable to infect the plant , the best combo for a prevention and treatment is having SAR, a good biological fungi defense , good airflow , good air filter to clean it in the room.key is clean air just like if you had contaminates in water . Another neglected thing is trying to grow with unhealthy plants or the enviroment is making them weaker, this gives the pest or molds a huge advantage in wanting and winning to attack ur plants.. another fact is It’s the age of a plant by age like everything lose their natrual defense and adding a extra boost and defense of SAR/ bacteria defense can truly save ya crop every time ( ever since I started being more proactive on these protocols I’ve saved soo much in % of all crops ). Like guide stated above once you see it (pm) that pm that’s always been in your room Inless your cleaning the air/filtering it has taken hold of ur plant and started a colony ( key is remeber pm isn’t systemic). this is why I suggested applying biofungicides + SAR biofungicides like regalia which are cheap and proven effective against these diseases than just one product defense/plan , these options are safe and will not allow the molds to colony and grow there Plus they are safe and approved to be used till end of harvest. The SAR (regalia ) will promote a defense for up to 14 days and this is a huge thing for people outdoors that in rain season , so many products they will need to be reapplied after rain where this is every 7-14 days and u can spray it a hr before the rain and know it will be SAR and protecting inside for up to 14 days
“Powdery mildew is a scourge to agricultural producers everywhere. This white, powdery fungus first begins to appear on plant leaves before spreading to affect stems, buds, and roots. Eventually, the entire plant succumbs to powdery mildew infection. Marijuana powdery mildew problems are endemic in many grow rooms. Achieving a higher air quality in your cannabis production area will dramatically reduce the risk of marijuana powdery mildew problems.
Most Marijuana Producers Mistakenly Prioritize Air Circulation over Air Purity
The use of grow lights is necessary to achieve the light-dark cycle needed for optimal cannabis plant health. Unfortunately, even with the best grow light technology, these lights throw off a lot of heat. To compensate for this heat production, many marijuana growers make use of large barn fans. These fans circulate air throughout a grow room, decreasing heat production from grow lights. Fans have the added benefit of reducing humidity that can gather between plants placed close together. This may keep humidity to more acceptable levels for cannabis growth.
The downside to this air circulation system is that it also spreads airborne pathogens around a growing environment. If one plant suffers exposure to marijuana powdery mildew, soon the entire grow room also suffers exposure to fungal spores. Despite this, many growers continue to use fans and other air circulation devices. These represent a significant threat to air quality and your resulting marijuana crop.
An Air Purification System Decreases Marijuana Powdery Mildew Problems
How, then, can growers achieve the pure air needed to keep plants safe from marijuana powdery mildew? The answer lies not in air circulation, but air purification. Air circulation simply means that air is being passively moved around an environment. Air purification is an active process by which pathogens are destroyed, improving the ambient air quality. By purifying the air, you can reduce or completely eliminate plant exposure to powdery mildew spores that can have a catastrophic effect.”
Marijuana Powdery Mildew and How Clean Air Can Help | AiroClean420
Managing marijuana powdery mildew is essential to ensure the quality of your cannabis product. Achieving excellent air quality is possible.www.airoclean420.com
Inside, I will stay with the sulfur. PM was dogging me in early '21 but have not seen it since wiping it out with sulfur.
For me, sulfur was easy, fast and 100% effective. In a previous post you said it just has its negatives unfortunately in regards to sulfur. What are those negatives?
Willie
🍓 Crush Genetics 🍓
Got it. Yes I don't use it anywhere near flower......the stuff isn;t toxic but it smells and tastes terrible or maybe worse.What I meant by "negative" effects of Sulphur (foliar sprayed ) is you cannot use it past 2nd-3rd week of flowers ( when buds are formed )
why? like many chemicals , trace or chemical elements . if foliar sprayed it can and will have residue of such in the buds.
good example is neem , safe? yes but not safe after flower/buds forming ( like so many traditional pesticides and fungi) and most def can effect the quality but also make ur buds contaminated unless washed off, that's un needed with these modern day protocols at any level of gardening .
biofungicides have made a huge impact on being able to achieve and fight pm and many molds when if you are growing organic or a specialty crop like cannabis it can be done easily and safely and by using things that are safe for all zones and leave no bad impacts on the area ur working in and consuming. for cost factor if not cheaper and better % not impacted exp outdoors. best recommend product is biological over traditional on cannabis. I saw after a round I wasn't ever going back outdoors without regalia and misc biofungicides cause the plants never get pm and my bud rot % went down so far it payed for itself first time.
if your trying to add more sulphur in flower just do it via drench ( good example is iron sulphate and epsom), thus avoiding any contamination and residue on ur buds of these elements.
for regalia it's the SAR/ISR of such that makes it beneficial not killing molds ( awesome action of defense ). so indoors to outdoors make no factor since its a promotion of a more healthy plant and also SAR effect. having such makes medium based and molds on leafs way less of a factor vs traditional fungicides where its cover or killing it.
Regalia® | Control Powdery Mildew | Pro Farm Group - Formerly Marrone Bio Innovations
Regalia® Bioungicide delivers improved crop yield and harvest quality by stimulating a plant’s ability to fight diseases. Effectively control Powdery mildew.marronebio.com
Outside, I was using milk to combat pm during flower and that's what it does.fights but does not win totally and it comes back. No way it goes 14 days rain or shine, I like that and see a clear benefit.
Gweedo's Growroom
Yoda Fired Up
This is great in addition to the stuff in the PM thread I started lol no one here should ever lose to it with all this info out here, thanks for sharing sir, and I've not seen it in 2 years now my key was insuring I've got awesome air exchange and circulation along with silica in the feed regimen all the way through stretch at full strength, when it did get me it was lack of circulation and the huge spike at lights off along with not having a de huey I the spot , no surprise I got it ???
- Status
