Powdery mildew - An easily exterminated parasite

Thanks for the report! Glad to hear it’s toast. That mildew shit can be insidious, and it’s really hard to cut through the noise to find a solution.

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man, a comment like this proves global warming is real, putting moisture into alaska air probably and making nice grounds for powdery mildew to flourish :thinking:

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oo it’s been really dry and it’s late in the season… you know what that means? MILDEW!!! JOY! I found a colony infesting legumes like the peas and other strange plants in the woods. Gimme a bit I’ll science that shit up.


You want to know what’s next? A snuff film of course!!!

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shit, I forgot the peas were hydrophobic. Gotta find a different victim! When I squirt water on the pea leaf it just forms into a ball, never spreading out.

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lol! OK well I’m going to have to think about this. All the colonies I found are on the same type of plant, even in the woods. The water bounces off! I’m gonna have to get creative with the snuff film.

I sprayed last year’s squash and pea beds with sulfur this early Spring. No peas this year, but no pm on the squash! None on the zinnias, either, and I only sprayed a few places where we have them planted. Mon the sulfur!

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Yah fuck those colonies lol! The downside is, after the mildew is wiped out, there’s nothing left to study and torture! I’m gonna have to go to the neighbors place to get a good sample.
Here’s the excellent news! I can easily PROVE the mildew is host specific by rubbing the mildew on cannabis and squash plants.

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There you go, a personally narrated infestation experiment. Sorry about the shitty camera. It’s old school!


Right, so in 2 weeks from now, I should be able to take that leaf and inspect it under the microscope. If there is any hope of the colony infesting, it’ll definitely do SOMETHING in 2 weeks right? lol! You can see the pea plant is really close to the cannabis one.

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ahh sorry those youtube dicks put an age restriction and viewing restriction on my video. I should bitch, because science isn’t restricted by community guidelines, or so it claims in the guidelines lol!

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Well, there was leaf rubbing, lol!

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I complained to those gootubers, and we’ll see what they say. I told them it was just another installment of my long running series of snuff films :wink:

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hah hah well apparently you’re not allowed to show a cannabis leaf, so the age restriction stays. That means the guidelines are confusing as fuck.

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I’ve been battling PM on my outdoor. Drenched them all with sulfur in early July and again in the middle of July. They started flowering about 2 weeks ago and I’ve noticed it’s back. I plucked off the culprit leaves and moved the plants to a new location. Any advice on what I might be able to do to nip this in the bud? I’m not against spraying them every few days with high pH water or peroxide, just rather not.

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ok what kind of sulfur are you using? Do you have an image of the colony?

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I didn’t find a source locally for pure-ish sulfur, but this soil acidifier’s primary composition is Sulfur and gypsum.

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That’s definitely not high yield, but it should work if mixed up stronger. Can you wipe that white patch off with your finger? I have some water scale on my plants that looks like that, but it’s not mildew. Just got to be sure of what it is… can you look at it with a magnifying glass?

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It doesn’t wipe off. For magnifying, best I can do is break out my dslr and macro lens. I’m in a hot and humid area and it being water scale has crossed my mind, the dew point is pretty high and my plants are covered in water every morning. So much so, for the last two weeks I’ve been moving them to a spot I’ve cleared out under some hedges to keep them dry in the evenings.

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I’m betting water scale for the following reasons:
it doesn’t wipe off.
it doesn’t look like mildew
the mildew would take at least 40 days to re-infest the plant.
If you have an ultra violet flashlight the mildew will glow bright in total darkness when you expose it to UV.

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