50/40/10 milk water ISO did it for my one NL plant outside. YMMV
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Interesting discussion. Reading some posts makes me really glad I do my own (organic) weed and don’t need to buy anything anywhere, not knowing what has been sprayed on it. 
Kind of makes me want to grow all my food too. 
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PM is not systemic, the issue is once you see the white fruiting bodies the spores are everywhere… and we generally only treat the plant and not the surrounding area… you keep seeing it on the same plant because that plant is susceptible to it,
Most of the stuff used is effective at killing it on the plant but there are still spores floating around the room, in the ac, etc… Even if you’re running a tight IPM the moment you stop (most stop in flower) spores are ready to jump on… so without sterilizing your room you’re only fighting half the battle…
Getting more calcium in your plant will help it defend against pm, (amino acids help with calcium uptake).
Calcium uptake creates more pectin in-between cells and prevents PM hyphae from reaching the moisture it wants inside your plants…
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Last year mine didn’t get pm until flower. Is that safe for flower?
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What you are saying about synthetics and organics is not based in fact it is totally your opinion. There is no scientific evidence to back up ur claims. I am not trolling I am just clarifying for the people that may not know. Organic is a cool way to grow but to say it grows a better product is untrue and has been debated and debunked many times on these forums. I have grown both synthetic and organic I’ve also grown with both and to be honest the best easiest most consistent quality comes from synthetics. But this is just my experience. The fact is that terp and thc levels is the same and in a blind taste test people cant tell the difference and that is fact.
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Now as far as eagle 20 goes it is poison and it is def worse to smoke then it is to ingest via wine or food because apparently it turns to sianide or some shot when smoked. I’ve use it before I am def not gonna sit here and lie to you but it is really best only to use with mothers and at worse case scenario before u flip to flower. PM isn’t that hard to deal with if u keep ur plants healthy. I get spots of pm on my lower leaves late into flower but they never reach my buds
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You haven’t had a problem with it burning or browning the hairs on your bud when you spray in flower? Also, do you know if castille soap like Dr. Bronners would work or is their something special about ag soap?
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It’s a organic systemic, I’m not sure if smoking small amounts of rosemaric acid is bad or not so I can’t recommend it in flower with a completely clear mind. Alot of times pm is hard to get rid of because the spores are naturally present in most environments. I find myself walking around the yard spraying other plants, I found that my lemon balm seems to be a magnet for it so I moved it further into the sun to rid that source. I haven’t had a issue in many years but it showed up last summer quite aggresively. Planning on doing alot of preventative maintenance in the near future. Might bleach the whole neighborhood lol
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Thanks! Last year, my guess is it came from the backyard rose bushes then moved to the zinnias that I pulled out, but it’s really hard preventively outdoors. Unlike everyone else who has great success with neem oil, I haven’t had success with it for anything! lol Bought the pure stuff and followed the directions to the letter. IME it wouldn’t even kill a flea. Any suggestions on what to spray my entire backyard with?. I grow organic out there. btw… not growing any fucken zinnias this year. lol
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I bookmarked your post. Gonna make some this year… If you are still following along you may have read that mine have only gotten pm in flower outdoors. Is the LAB fine for flower?
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I’m completely organic myself and praise you for the efforts, I use a really strong mix of a few different things, mainly essential oils ,rosemary, cedar, eucalyptol, cinnamon. I combine it with some earth friendly soap. Sierra natural science makes some good products but there expensive on a large scale so I’ve been making my own. Bacillus pumilis has been shown to be effective I’m considering how to brew a huge batch of it to spray on everything. I’m a big fan of micro organisms, they seem to be the most effective.
Sulfur sprays work good as a preventative,
Streptomyces Lydicus is another commercialy available bacteria that will prevent most types of Erysiphales spores from taking hold. Also certain pests like aphids and pincher bugs can spread the spores from plant to plant. This is why large commercial agriculture plots look like scorched Earth, so many things like the same stuff we do.
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You know maybe I’ll just have to start making large batches of LAB and just hose end spray the whole backyard along with all my other regiments out there. Hell, I’ll try it up until flower at this point maybe it will kill the sleeping spores on the roses or the other million plants out there before it wants to spread to my least resistant strains of cannabis. I’ll practically try anything this year as long as it’s organic and won’t kill the bees. Didn’t know about a sulpher spray. Any particular brand and how often can you spray it in a season?
Full disclosure means I have to admit, I use chemical fertilizers on my container flowers as most are in a soilless mix, so I’m not chem free and the one non-organic thing I use on my cannabis and veggies is a asprin foliar because aloe is really expensive for the square footage I’m dealing with, but I compost and do my part. Well, I try to
Oh yeah, I grow Nasturtiums for the aphids. Didn’t even see one on my cannabis this year 
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Sulfur is very effective and is what is most commonly used in grape production, it’s part of the reason wine has such high sulfur content. I wouldn’t use it on flowering plants but it works very well during veg. Safer brand makes a pre diluted mix, you could at least look it up to see the percents if wanting to make your own. I’ve resorted to treating a pretty large area around the grow just to give my self peace of mind, I grow alot of other ornamental plants and veggies so I seem to be fighting something somewhere at all times.
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Same!! I know we are slightly off topic for the moment, my apologies everyone!
Do you know if white fly is a pest to cannabis? I know it’s a general pest, but not sure if it bothers weed. I just had another companion planting theory for this year, but I’m still thinking it through. lol
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@beacher this is a great thread. Lots of good info to be had in here! Got me thinking of my own preventive measures this year!
p.s. don’t worry I’ll take them to my own thread!
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Actually yes white flies are very bad, they leave a honey dew type residue behind that spreads a large variety of disease and attracts ants that then want to farm aphids or more white flies. They also eat plants on a small scale.zinnias attract white fly predators and marigolds tend to keep them away. Companion planting can be very helpfull. Worst white flies and aphids I ever had we’re on brussel sprouts.
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This is not true. Both substances are made in the same place, the trichome heads, but they are totally different compounds.
The terpenes and cannabinoids together create the flavor and high of a particular plant, known as the “entourage effect”.
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I would tend to agree with this if we further narrowed that to consistency of indoor grows only, where every element is manually manipulated.
Having said that… organic vs. synthetic isn’t the point of this thread and is highly subjective. Let’s leave it for another thread @DesertGrown 
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Where did I mention anything about nutrients?
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Sorry! Looks like my point came across weird via text.
It was more directed at us all being off topic. lol
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