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OfflinePossum-Pie
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Shiitake mycelium on fruiting block
    #27071143 - 12/04/20 02:59 AM (3 years, 1 month ago)

First time Shiitake grower here.
How deep into the fruiting block should the mycelium go? I used hardwood sawdust and bran, the outsides look perfect about 80% browned and ready for the grow room. Inoculated 8 weeks ago. I used small Unicorn bags and one block broke in half when I was cutting the bag off.  The growth looked like it was on the surface only. Maybe this is normal...any thoughts?


Edited by Possum-Pie (12/04/20 07:15 AM)


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OfflineForresterM
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Re: Shiitake mycelium on fruiting block [Re: Possum-Pie]
    #27072335 - 12/04/20 05:50 PM (3 years, 1 month ago)

Unless you really messed it up the mycelium should be throughout.  They browning only on the outside.  Pics?


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Re: Shiitake mycelium on fruiting block [Re: Forrester]
    #27072388 - 12/04/20 06:16 PM (3 years, 1 month ago)

Thing is, the fruiting block turned all white, looked healthy, began to turn brown, and after 8 weeks looked ready to fruit. I cold shocked it smacked it and dunked it in water.  It was a tall thin Unicorn bag and accidentally broke in the bag a few weeks ago, but still looked healthy. The mycelium is only about 1/4-1/2 inch deep and the entire center of the block is just sawdust.  It was perfect humidity.  I have the pieces in the fruiting room and misted them several times today.  I'm hoping to see some popcorning in the next few days, but now I'm worried.  Smells good and earthy, no contaminants seen. I dislike these tall thin bags and am not buying them again.



This is a cross section through the middle of the block.


Edited by Possum-Pie (12/04/20 06:33 PM)


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Re: Shiitake mycelium on fruiting block [Re: Possum-Pie]
    #27072424 - 12/04/20 06:41 PM (3 years, 1 month ago)



Here is a different bag that I haven't opened yet. The backside is still white but the front has "crusted" brown like it should when getting near fruiting. I realized too late that I filled it too full, maybe high CO2 in bag? the mycelium didn't die though, continued to look like the pictures of healthy blocks I've seen elsewhere.


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Re: Shiitake mycelium on fruiting block [Re: Possum-Pie]
    #27073265 - 12/05/20 10:19 AM (3 years, 1 month ago)

It's really hard to say much from that picture, but if you touch the center part does it just crumble and fall apart as sawdust should?  Or is it stuck together well? 

Cause if it's stuck together like it looks like it is, it's mycelium doing that, it just might not look white.


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Re: Shiitake mycelium on fruiting block [Re: Forrester]
    #27073483 - 12/05/20 12:25 PM (3 years, 1 month ago)

I think the mycelium network runs all through the center. It isn't thick like the outside . My blocks when broken look similar. When you think about it grain jars are always thicker on outside than in the middle.


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Re: Shiitake mycelium on fruiting block [Re: Quadman]
    #27074056 - 12/05/20 06:45 PM (3 years, 1 month ago)

Thanks. Honestly, the center of the block is just wet sawdust. There feels like no mycelium holding it together.  This is day 2 in the fruiting room so We'll soon see. I'm worried for my other 2 Shiitake blocks if this fails b/c they all are on the same medium and look the same. 80/20 hardwood to bran. No sign of contamination but they never formed a strong bark, perhaps I'm rushing them as it's only been 8 weeks in bag. I've seen some Youtube video's of professional growers being really rough with their blocks, and they don't break. I think if I blasted mine with a garden hose like one guy did on Youtube I'd blow apart like a firecracker was in it!


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Re: Shiitake mycelium on fruiting block [Re: Possum-Pie]
    #27074096 - 12/05/20 07:06 PM (3 years, 1 month ago)

My guess would be you did not have the right water content in your sub. So the center never colonized. The blocks will still fruit. If that is the case you got lucky. Test your water content next time and make sure you have 60%. See my sig for how to do it.


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Re: Shiitake mycelium on fruiting block [Re: SHROOMSISAY01]
    #27074548 - 12/06/20 03:50 AM (3 years, 1 month ago)

Quote:

SHROOMSISAY01 said:
My guess would be you did not have the right water content in your sub. So the center never colonized. The blocks will still fruit. If that is the case you got lucky. Test your water content next time and make sure you have 60%. See my sig for how to do it.




Thanks for the suggestion.  I followed a recipe of 1.4 liters of H2O per 5 lb fruiting block made of 5 cups hardwood pellets 1.25 cups bran  It felt "perfect" after I mixed it as squeezing very hard brought only one drop of water out. The center of the broken block is not dry at all, nor is it sopping wet.
Same formula for my Maitake blocks which are firm, white, and putting out "Maitake brains" on the surface already. I keep record of everything I do and dates so I can backtrack any problems. I'm not putting my other two Shiitake blocks in the grow room yet as perhaps it was too soon. Still, mycelium should have cultivated deeper into that broken block by now.


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Re: Shiitake mycelium on fruiting block [Re: Possum-Pie]
    #27075162 - 12/06/20 11:56 AM (3 years, 1 month ago)

Don't like the look of that block. If it's been incubating eight weeks it should popcorn and t doesn't sufficiently. So.... either sterilization wasn't good enough or you got some bacteria in your sub.

:frenchie:


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Re: Shiitake mycelium on fruiting block [Re: frog48]
    #27075498 - 12/06/20 03:17 PM (3 years, 1 month ago)

Quote:

frog48 said:
Don't like the look of that block. If it's been incubating eight weeks it should popcorn and t doesn't sufficiently. So.... either sterilization wasn't good enough or you got some bacteria in your sub.

:frenchie:




Thanks for the reply.  Sterile technique was used throughout and all other bags of other strains are progressing nicely from the process.  I'm a nurse, and am meticulous with following sterile technique. No sign of contaminants such as discolor, odor, etc. BUT something is definitely wrong. I can't believe that H2O is the culprit, or the inoculant. I started another grain spawn jar last week with the same syringe inoculant and it looks beautiful. My suspicion is beginning to lie with bags being too full and not enough air headspace. I knew at the time I sealed the bags that they were too full. Might that have caused early mycelium death?

*Edit*
As of this AM it has been 4 days in the grow room and no sign of popcorning or mushrooms. It is obvious that the block has stopped maturing.
Here are pics of the other 2 bags of Shiitake. I'm letting them mature longer but they don't appear to be changing anymore.



Edited by Possum-Pie (12/07/20 11:52 AM)


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