What Can I Do About the Black Spots?

Troubleshooting Diseases
1

Is this bad? I’m about a month out before harvest. Gold Leaf.

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Here’s the whole plant…

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2

It looks very not good

Ima tag some folks who might be able to help as I have no idea how to fix other that the off shoot that a hydrogen peroxide mix could maybe help but I just don’t know
@Hellraiser @CygnusX1 @dbrn32

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3

Black mold?

4

This…

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5

w00t I actually got something right?

Even a broken (analog) clock tells time correctly twice a day

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6

You are usually on target.

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7

I would give the peroxide a shot.

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8

That usually ends up badly, stem rot, but the peroxide would be worth a shot.

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9

What causes that

10

Mold. Limited airflow and/or high humidity.

11

Looks like an outside grow, could it be in the root system

12

Plenty of air. Humidity has been high for these parts this time of year 50-60% plus upper 90’s.

13

We see a lot of mold problems among outdoor growers this time of year.

14

Thanks for the tips. My other one has issues but not this. 1:1 ratio of peroxide to water? Should I spray just the stem or the entire plant? And how often?

15

Concentrate spraying on the affected areas and, if you are in a high humidity area, spray a couple of times a week going forward as a preventative.

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16

Es no beuno.

Cannabis, canola… diseases aren’t picky

I can find article on it and cannabis. Just none I can link here. K’now

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Heavy rains

17

I found this but don’t know if it applies cuz I don’t see any leaf damage
Phytophthora root and stem rot is a soil-borne fungal disease caused by Phytophthora sojae . This pathogen causes seed rots, pre- and post emergence damping off of seedlings and stem rot of plants at various growth stages. Disease development is favored by soil temperatures is above 60oF and high soil moisture.

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18

So about 2 hours after I sprayed the h2o2 we got over 1" of rain. Should I re-spray or wait a few days?

19

Id respray
It won’t hurt it anymore than it’s already suffering

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20

I know you’re growing outside but if it was me I would try to figure out a way to partially cover them to keep the rain off then put a fan on them.

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