Why is this happening? Ideas?

[Earthling]

Thanks for the replies guys, will take a photo and load up after lights out...1hour.
 
Ditylenchus dipsaci doesn't fit as the stems look exactly the same across this variety when I had no stem rot....except for the rot...
I was looking at that page last night Billy and I was thinking Sclerotinia sclerotiorum, 4th paragraph under the fungi title http://medicalmarijuana.com/experts/expert/title.cfm?artID=727
 
The stems have expanded and 'malformed' since the first crop over a year ago, same strain, different phenotypes. The first phenotypes were susceptible to bud rot. This phenotype has no bud rot and at first no rot of any kind...except this now...Im tempted to dump it and get another variety, but when it goes full crop, it delivers over a gram a watt...would love to solve this. Its only the last two crops that I've had issues with this stem rot.
Had Green Crack strain, a single plant last grow amongst this variety and it had no stem malformation and no problems, whilst this variety did.

[Earthling]

The rot/fungi begins on the inside of the plant and grows out to  forma  watery hole/legion.

http://www.weedguru.com/forum/viewtopic.php?t=27908

 

The above website says to treat and what to treat with, but not how to apply, how do I apply it? Spray on the stem? The top of the coco? Its in flower, so foliage spraying is a no go.
 

[burner]

Just out of curiosity, you didn't recycle the pots from the last grow, by any chance? And if you did, did you sterilise them first?

[billygoat]

I thought the same when I read it earthling...

 

At least you can now try and rule that out... Might be worth figuring out exactly what it is at risk if sacrificing the buds, just do you start preventative measures early next grow..

[Earthling]

Yeah I sterilized the pots. More preventative measures coming in...

 

Ive had a lot of issues with this variety and I've decided with all these mould/rot problems I'm getting a lot less then 1gram per watt. I will do a full double sterilization of the room and everything in it. Then maybe keep one of the clones, but have new bean varieties for the next crop. That way I will find out if its bad husbandry/cleaning on my part or just the variety...

 

Second plant has succumbed...third one ok so far......

 

Heres a pic, you can  see in the middle of the photo how the stem is dark/black...that's the rot coming from the inside out. This variety has always 'split/expanded' at the base like that.

 

[itchybromusic]

can you use those preventative measures on the third now 

[Naycha]

I would think that it is more likely the fungus enters the plant through a damaged section like the split base or any other part eg where a branch has been bent or similar.

 

That plant looks very wet at the base which would not help the situation. Also try not to let leaves sit on top of the medium as this is perfect for fungus to live on.

[Earthling]

Yes I am itchy....will see how it goes. As I stated before I was going to pop some new seeds and try out new varieties. However, so far this third hasn't come down with the rot and spraying the trunk and surface of the coco seems to have worked. If it does work Im happy to continue on. But I will keep looking for better ways to stop this rot getting in.

 

Your right Naycha, its getting in through a split somewhere. I know the trunk on this variety always swells something bad and causes splitting, so I feel that's the number one entry point there. Also branch split was the culprit on the first one down.

What's the best way to stop fungi getting into these splits? I sprayed with Kocide Blue Xtra (Copper) so far, is there a paste or gum or some other physical shield? Or just spraying the trunk and joins every 7 days?

 

Yes coco surface is wet  Naycha from watering/flushing the day before...how do I water without the coco getting wet Yes leaves are bad on the top and only there as I was harvesting and bits fall, normally I keep the room and pots clear of dead material.

Edited January 15, 2016 by Earthling

[Naycha]

Yes I am itchy....will see how it goes. As I stated before I was going to pop some new seeds and try out new varieties. However, so far this third hasn't come down with the rot and spraying the trunk and surface of the coco seems to have worked. If it does work Im happy to continue on. But I will keep looking for better ways to stop this rot getting in.

 

Your right Naycha, its getting in through a split somewhere. I know the trunk on this variety always swells something bad and causes splitting, so I feel that's the number one entry point there. Also branch split was the culprit on the first one down.

What's the best way to stop fungi getting into these splits? I sprayed with Kocide Blue Xtra (Copper) so far, is there a paste or gum or some other physical shield? Or just spraying the trunk and joins every 7 days?

 

Yes coco surface is wet  Naycha from watering/flushing the day before...how do I water without the coco getting wet Yes leaves are bad on the top and only there as I was harvesting and bits fall, normally I keep the room and pots clear of dead material.

 

You should avoid watering directly onto the trunk. From the photo you posted it looks like you water directly on the trunk and around the edge but not in between as this patch is dry.

[Earthling]

I see where your coming from now. I watered a day or two before the photo and the whole coco surface gets wet when watering. It had dried out on the surface in patches. I don't let ANY water touch the trunk or branches or joints since the previous harvest....except for this copper anti-fungal spray.