Started seeing this deficiency a couple of days ago. Still in the fox farm ocean Forest. I have fed them with build a soils build a bloom. But they haven’t had anything else other than a top dress of build a flower with worm castings in a little fresh Ocean Forest
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Could you put up a whole plant picture?
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I can get a better one in the morning for sure.
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Its just popping up on lower growth larger fan leaves. I have not seen it anywhere near the flowers or on any new growth. This is the two pineapple express autos also. It’s showing on both of them. None of the other 7
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Looks like Septoria to me. @TheMadFlascher what do you think?
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I don’t know. It looks hungry to me. Hard to say. Whole plant picture will help. Also it close picture of the leaves that are not sick.
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To me it looks like the same problem @chrisj had a few weeks ago.
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Here are some better pictures of the whole plants. I did a ton of defoliation with clean trimmers. I got off all affected leaves. And and checked all the plants. Just to be safe.
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The third picture is telling a story. I just don’t know the story. As far as it being septoria, I looked up pictures of it on cannabis looks very different to me. I don’t know when Bob will be by he’s very busy working right now. This is his busy time of year.
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Greatly appreciated. Some of the leaves I took off look similar to the pictures I found and others don’t do maybe a couple things going on. Since I got all spotty leaves off i will follow up in a couple days. Hopefully it stays off my maturing flowers.
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I just found the thread @chrisj had posted and his was Alternaria not Septoria.
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@phofer, sorry for the late reply. That is definitely a fungal infection! As @nacho151 pointed out it is either Septoria or Alternaria…local species of the two vary to some extent but they are both SERIOUS
fungal infections that will require control.
You described the symptoms very well…these infections normally begin on older, lower canopy leaves.
They tend to move upward in the plant in a rather random fashion.
For instructional purposes, I want to differentiate early fungal infections from nutrient deficiencies,
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Fungal infections…predominate in both the early spring and late fall…there are a lot of fungal spores in the air during these seasons so unless you are drawing outside air thorough a HEPA filter it’s tough to totally eliminate your exposure.
Almost all infections begin with tell tale lighter yellow spots on your green leaves. Many times you wont notice them until they turn black. If you see a black or dark brown spot surrounded by a yellow halo…that is a fungal infection and looks completely different from nutrient issues.
What’s your best defense? VPD ! VPD! To the best of your abilities, try to maintain your environment within the appropriate VPD temp/humidity. -
Nutrient related issues: Again, your lower/older leaves may show deficiency (uniform yellowing) first. The BIG difference is there is NO black lesions. Even if you have ‘brown spots’ on your leaves, if there is no yellow halo around that lesion, it is most likely a nutrient/pH issue. You will also note that nuet damage almost ALWAYS shows on the leaf TIP whereas fungal infections tend to develop on the FACE or MARGINS of the leaf.
Hope that helps. BTW lesions are just ‘dead spots’ brown or black on your leaf.
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Incredible information man. Thank you very much. Going to get this taken care of quickly. Am I in trouble because of the issues being on auto flowers that are in mid flower. The plants that are farthest along have not been infected. And those are almost done.
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First thing I would do is apply a peroxide (H2O2) spray immediately to ALL YOUR plants. Try to wet all the tissue…tops and bottoms of leaves, stems everything you can!!
Hydrogen peroxide is not going to kill the infection currently on your leaves…Try to remove ALL obviously infected leaves to minimize inoculant. H2O2 is a disinfectant so what you are trying to do is is SLOW the progression of the disease. You are basically in a race against time! You need your plants to finish bud development before the infection kills all your leaves.
I would apply your peroxide sprays EVERY day…It is an excellent contact disinfectant but breaks down pretty quickly…so it’s going to be some work trying to save your crop!
Best of Luck and NEVER abandon the ship without a FIGHT!
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Awesome man. Thank you. Gonna pick a bunch up and get it going.
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Good, Pull as many of those yellow, or already infected leaves as soon as you can.
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They are all removed
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I went over all nine plants top to bottom side to side every which way
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Very healthy looking grow you got there! What size are the biggest bags? 10gal ?
Marty
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