Looking for advice combating rust fungus from someone with past experience
How about some pictures of the affected plants and description of your grow.
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I have 2 regular that have it and 1 auto. Greenhouse grow, all potted with soil. I’m nearly 100% sure it’s rust.
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Cali Magic would help.
@Side3ffects Didn’t happen to spray for bugs did you ?
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@Oldguy Nice Observation! It’s all all about the details 
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Don’t think it’s calcium because it’s happening to 3 dif plants and it’s in soil (ff ocean forest which makes it less likely also using jacks 123. sprayed because of the rust using amazing dr. Zymes. Bug is because the fan in the greenhouse sucking them in and through.
My moneys on pests of some kind.
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They look like bug tracks to me too.
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Looks like pest to me also if it doesn’t rub off it’s not rust fungus that’s how you test for it