Gotta love weird fungal stuff.

[Cactus Squatter]

A lovely fungal revisit from last years grow. Lost a Bangi Haze today. Came home to a pile of branches on the ground and the main stem super weak. The branches basically dislocated and fell out.

Plant is fine one day, branches falling off and rotting from the inside out the next. Lots of splits down the branches. Fiber is super loose internally and branches almost crumble apart when squeezed or twisted. Weird grey, black and brown streaks in the internals of the branches.

I’ve come to find out that my house was built on an old cotton farm. I’m starting to think I have cotton wilt since it is very common in these old fields and a lot of people have issues with it locally.

I’ve tried all sorts of stuff to improve my soil. Tons of LAB everywhere, tons of good fungal and bacteria cultures constantly. If anyone has any suggestions short of complete replacement of my backyard soil I’m all ears.

Here’s a couple quick pics I took as I was removing it. The ones that basically dislocated had black all over and through the center of the stem so I bagged those fast.

 

[acespicoli]

Whats your soil type? It stays wet im thinking... Is this plant in a raised bed ? Was the soil saturated with water for a week or more?

 

[Cactus Squatter]

Whats your soil type? It stays wet im thinking... Is this plant in a raised bed ? Was the soil saturated with water for a week or more?

This one never got water logged. My actual soil I grow in is fine, it’s when the roots go through the grow bags and down into the ground that this issue comes up, or if I grow a plant directly in the ground.

Next year I’m going to put an air gap under all my bags to air prune the bottom roots as well so they never hit the dirt under my grow area. I just wish I could get it out of my soil all together.

 

[acespicoli]

Try a pool shock watered in in one area as a test ...?

Hydrogen peroxide to treat Root Rot H202 kills the bacteria and fungi in the soil responsible for root rot, and restores oxygen to help remaining roots recover faster. Directions: 1:1 ratio of Oxygen Plus 3% and water. Bottom water or top water so potting mix is fully saturated.


Underground fungi can be huge...
feel your pain bro nothing worse than difficult soil


Flush with lots of pure water make sure your water source is not from the same ground?

 

[therevverend]

That's nasty stuff I don't want any part of that. Got enough stem rot from botrytis. I think you're right about it being fungal but I can't narrow down what specific disease it is. Maybe some sort of stem canker. It's weird how it shreds the stalk like that. Any other symptoms in other parts of the plant, the leaves or roots?

There's a few things you can do but there's probably not a magic cure outside of sterilizing your soil. You could flood it over winter, drown the disease under water. Of course you want a healthy well-draining soil with a good balance of nutrients and beneficial microbes. At harvest, overwinter, and once more in the spring you can till the soil. Give it a good mixing to aerate it, break it up and bring the diseased bits up to the surface and bury them down deep. A lot of the diseases that hide in soil don't like this treatment, don't like sunlight and changes in temperature and humidity.

 

[Cactus Squatter]

Try a pool shock watered in in one area as a test ...?

Hydrogen peroxide to treat Root Rot H202 kills the bacteria and fungi in the soil responsible for root rot, and restores oxygen to help remaining roots recover faster. Directions: 1:1 ratio of Oxygen Plus 3% and water. Bottom water or top water so potting mix is fully saturated.


Underground fungi can be huge...
feel your pain bro nothing worse than difficult soil


Flush with lots of pure water make sure your water source is not from the same ground?

I haven’t tried pool shock yet.
That’s honestly not a bad idea though, my grow bags sit on top of an artificial lawn section and there’s rock in all sides of it so it wouldn’t be hard to saturate that area deeply with it without harm.

 

[acespicoli]

Sclerotinia sclerotiorum - Wikipedia

en.wikipedia.org

Check these photos does anything look familiar ?

S. sclerotiorum can also be known as cottony rot

Growing this fungus in a petri dish would look like? Tech to get a exact diagnosis

Hemp Canker aka

Sclerotinia sclerotiorum​

Management Considerations for Stem Canker​

At this time, management of this disease may only be accomplished through resistant cultivars. Research is ongoing to identify more about management of this disease.

Hemp Diseases - Plant Pathology - University of Florida, Institute of Food and Agricultural Sciences - UF/IFAS

plantpath.ifas.ufl.edu