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OfflinePsilocyBen17
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How much spawn is too much?
    #23352885 - 06/16/16 10:44 PM (7 years, 7 months ago)

Been thinking a bit about diminishing regarding spawn rate on my oyster logs....

currently I'm using 4 quarts of spawn per log. logs are 3.5'' by 9'' diameter....not sure of dry/wet weight but I'll see if I can weigh some tomorrow.

Do you think thats a little on the high end? I'm going to be doing some comparisons so I can figure out  yield vs spawn rate, but it would be nice to get some input from you guys to speed the process up a little.


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Invisibleweetsie
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Re: How much spawn is too much? [Re: PsilocyBen17]
    #23353180 - 06/17/16 12:24 AM (7 years, 7 months ago)

When I only have a small amount of spawn and I'm feeling impatient I will spawn some of it at 1% and so far I've not had an issue other than maybe slow colonization. I think 2-5% is sensible for oysters.

At 2% 4 quarts would make 200lbs of wet substrate.


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OfflineTravelAgency
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Re: How much spawn is too much? [Re: weetsie]
    #23353324 - 06/17/16 01:18 AM (7 years, 7 months ago)

There's really never a reason to go to 2% spawn ratio- not when you can grain to grain (g2g) and take one wedge as far as 37 qts easy. The colonization time would be too big of a window for contaminants to get in, and your yield will be lower even if you reach full colonization. If you only have 2% grain find something you can use as spawn to expand it before going to substrate.

To Ben: I am just now using hardwood for the first time and supplementing for the first time- but from my experience with pine- I could use one qt spawn to colonize 2 5lbs bags- but after experimenting found that using 1 qt per 5lbs colonized much more quickly and had next to no contams- and the yield of the single block from 1qt was greater than the yield from the 2 half qt 5lbs bags put together. I don't have the documentation to back this up (I'm about to change all that) but I'd say stick to around that ratio from my experience.


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OfflinePsilocyBen17
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Re: How much spawn is too much? [Re: TravelAgency]
    #23353383 - 06/17/16 01:52 AM (7 years, 7 months ago)

whatt? how does 1qt colonize 5lbs of sub quicker than 2.5lbs of sub?


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Invisibleweetsie
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Re: How much spawn is too much? [Re: PsilocyBen17]
    #23353447 - 06/17/16 02:32 AM (7 years, 7 months ago)

Quote:

TravelAgency said:
There's really never a reason to go to 2% spawn ratio- not when you can grain to grain (g2g) and take one wedge as far as 37 qts easy. The colonization time would be too big of a window for contaminants to get in, and your yield will be lower even if you reach full colonization. If you only have 2% grain find something you can use as spawn to expand it before going to substrate.





Ive seen the 2-5% figure quoted in tons of papers on oysters, pretty sure most large commercial operations are using ratios within this range. Reaching full colonization in a couple of weeks with 2% spawn is definitely possible with pink and yellow oysters, no reason why contams should be a problem. That said, I'm not trying to say 2% is the way to go or anything, just that it's the lower limit I typically see quoted and is definitely viable, though maybe not optimum. Given grain is often 20x the price of bulk substrate its a good reason to use it sparingly. I have 33qts of pink oyster spawn that should finish in a few days and the plan is to spawn it at 5% to straw.

Using 20% spawn is daft IMO, leave that to the cube growers.


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OfflineTravelAgency
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Re: How much spawn is too much? [Re: PsilocyBen17]
    #23353478 - 06/17/16 02:57 AM (7 years, 7 months ago)

Quote:

PsilocyBen17 said:
whatt? how does 1qt colonize 5lbs of sub quicker than 2.5lbs of sub?




Pardon but I think you misunderstood (or I misspoke) - .5 qt to 5lbs sawdust + .5 qt to 5lbs sawdust = IME much slower colonization, more prone to contaminants, and less yield than the 1 qt to 5lbs sawdust.

Once again this is only in my limited experience.


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OfflineHericiumHeadGuy
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Re: How much spawn is too much? [Re: TravelAgency]
    #23353719 - 06/17/16 06:09 AM (7 years, 7 months ago)

I like high ratio but had play around a bit.
With a high quality supplemented sustrate i can get away with low ratio
With pasteurised or ph adjusted low quality substrate, not so much.
I also see grain spawn as a great food source for shrooms that help keep growth strong so i dont wish to lowering it too much.
My lower ratio for oyster is 2.5% or 25g spawn to 1000g dry substrate


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OfflinePsilocyBen17
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Re: How much spawn is too much? [Re: TravelAgency]
    #23353996 - 06/17/16 08:42 AM (7 years, 7 months ago)

Quote:

TravelAgency said:
Quote:

PsilocyBen17 said:
whatt? how does 1qt colonize 5lbs of sub quicker than 2.5lbs of sub?




Pardon but I think you misunderstood (or I misspoke) - .5 qt to 5lbs sawdust + .5 qt to 5lbs sawdust = IME much slower colonization, more prone to contaminants, and less yield than the 1 qt to 5lbs sawdust.

Once again this is only in my limited experience.




ohhh i see the confusion now. thx man


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Invisiblemicelio
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Re: How much spawn is too much? [Re: PsilocyBen17]
    #23354140 - 06/17/16 09:29 AM (7 years, 7 months ago)

:takingnotes:


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