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Offlinebik123
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High humidity affects blocks?
    #18938760 - 10/06/13 02:25 AM (10 years, 3 months ago)

I've an outside tent and i placed about 200 shiitake sawdust blocks in it. When the weather gets really warm to 29-31C, i spray water inside and ouside and it comes down to 25-26C. I do it every 11/2 hrs or so in the hottest part of the day like at 11am, 12.30pm, 2pm and 4 pm. My goals was not to let the tempt climb above 26C.

The blocks were colonizing. But after about 3 weeks, it started to die. I suspected it could be the  mites, but i rule that out for the rubber-band was tightened firmly to the fibre, which acts as a filter. (In the same tent, there were about 50 blocks of P. oyster. They are ok and colonizing well)

And so, i was thinking, did the frequent watering raised the humidity in the tent above 90% and kept it constant that affected the shiitake blocks?

Perplexed!


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OfflineRogerRabbitM
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Re: High humidity affects blocks? [Re: bik123]
    #18938956 - 10/06/13 05:19 AM (10 years, 3 months ago)

It's not humidity but substrate moisture.  Shiitake blocks don't like staying wet.  You can't reduce temperature by adding moisture beyond a certain point.  I'd suggest getting a swamp cooler and back off the spraying.  Even so, you won't get more than a 5 degree drop, and that requires low ambient humidity.

Most warm weather shiitake strains can do OK in 31C temps.
RR


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InvisibleMr. Alien
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Re: High humidity affects blocks? [Re: RogerRabbit]
    #19736238 - 03/23/14 11:30 AM (9 years, 10 months ago)

I was wondering the same thing...

But how much high humidity will affect blocks? what problems will cause?

Is just that i want to grow different species in the GH, especially species that like high humidity 95-99%.


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Offlinet3chnobily
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Re: High humidity affects blocks? [Re: Mr. Alien]
    #19737549 - 03/23/14 05:12 PM (9 years, 10 months ago)

High RH% is great as long you also have good FAE.  What you don't want to do is drown your substrate.  That leads to anaerobic conditions and bacterial infection.


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OfflineAmanita virosa
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Re: High humidity affects blocks? [Re: bik123]
    #19737945 - 03/23/14 07:01 PM (9 years, 10 months ago)

Quote:

bik123 said:
I've an outside tent and i placed about 200 shiitake sawdust blocks in it. When the weather gets really warm to 29-31C, i spray water inside and ouside and it comes down to 25-26C. I do it every 11/2 hrs or so in the hottest part of the day like at 11am, 12.30pm, 2pm and 4 pm. My goals was not to let the tempt climb above 26C.

The blocks were colonizing. But after about 3 weeks, it started to die. I suspected it could be the  mites, but i rule that out for the rubber-band was tightened firmly to the fibre, which acts as a filter. (In the same tent, there were about 50 blocks of P. oyster. They are ok and colonizing well)

And so, i was thinking, did the frequent watering raised the humidity in the tent above 90% and kept it constant that affected the shiitake blocks?

Perplexed!



Are the shiitake blocks still bagged?  If so the humidity is irrelevant. If not you likely cracked them open too soon. Are you sure the Myc is dying?  Shiitake turns brown naturally just before the onset of pinning/fruiting.


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Offlinechefinainteasy
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Re: High humidity affects blocks? [Re: Amanita virosa]
    #19737960 - 03/23/14 07:06 PM (9 years, 10 months ago)

Those were my thoughts. What makes you say they are dying? Are they turning colors? Stopped colonizing? It sounds like there still in the bag colonizing, how long have they been colonizing? Is there a lot of light on the room? Can you put up a pic?


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InvisibleMr. Alien
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Re: High humidity affects blocks? [Re: chefinainteasy]
    #19737982 - 03/23/14 07:11 PM (9 years, 10 months ago)

No, no what im saying is that i saw the shiitake parameters and it said that the optimal humidity is 60%-80%, what problems will cause if i fruit in 95%?

Also i want to ask if i have to calibrate my hygrometer with the salt method (75%) this is because the shiitake likes 60% to 80% RH and the salt method fits in that range. if i want to grow cubes for example i would use the towel method right?

What do you mean about drowning, can shiitake blocks drown without the mycobag at 95 to 99% RH?


Edited by Mr. Alien (03/23/14 11:21 PM)


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Offlinet3chnobily
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Re: High humidity affects blocks? [Re: Mr. Alien]
    #19739710 - 03/24/14 05:55 AM (9 years, 10 months ago)

They won't drown at high RH but if they are continually getting hosed with water with no chance to dry inbetween you could have problems.  Shiitake fruits will be soft and mushy at constant 99%


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