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Re: case misting question [Re: Dymentia]
    #1350419 -

Im havent really misted the casing yet, it doesnt appear dry yet, so I didnt see the need...

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Re: case misting question [Re: zoomery]
    #1350559 -

You don't need to drown your casing. Humidity in the 80s is best for casings, and your temp should be in the mid 70s. Mist whent he coir appears dry, it should be a slightly different color.

Now, I've never grown, but this is what seems to be workign for people.

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Re: case misting question [Re: Moronacracy]
    #1350587 -

Everybody keeps saying Humidity in 80s for casings. But are you referring to the whole casing cycle? Because i was informed that humidity in the 80s is best for POST PINNING stage. Im asking for the PRE pinning stage.

And the only reason Im asking is because a lot of people are disagreeing with what is in the faq.

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Re: case misting question [Re: zoomery]
    #1351033 -

According to Stamets, our God.. 92%-95% rh PRE-pinning, cut back to 86% after pins have developed. Of course I may be off as this is from memory but I am almost positive that's what it says. 1-3 air exchanges per hour is ideal..you can get away with 3 fans a day.


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Re: case misting question [Re: Shroomism]
    #1351132 -

>According to Stamets, our God.. 92%-95% rh PRE-pinning,

No, according to Stamets 95-100% for this stage.
Read http://www.shroomery.org/index/par/23457 .


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Grow Mushrooms from Spores - PF-Tek for Simple Minds

Edited by Anno (03/04/03 09:42 PM)

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Re: case misting question [Re: Anno]
    #1351156 -

Ahh yes wise old sensai.. I thought I might have been off a bit. Guess I should brush the dust of my TMC.. haven't cracked open the Bible of shroom knowledge pin a while.


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Re: case misting question [Re: Shroomism]
    #1351239 -

im with this. I was told that pins need high RH for formation. Once your casing starts to pin then u can lower RH..



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Re: case misting question [Re: zoomery]
    #1351343 -

Quote:
Everybody keeps saying Humidity in 80s for casings. But are you referring to the whole casing cycle? Because i was informed that humidity in the 80s is best for POST PINNING stage. Im asking for the PRE pinning stage.



From my friend's experience, casings do fine if you leave them at about 85% to 90% the whole time; pre-pin, pin, and fruiting. You can probably optimize things by using different RH at each phase, but as far as he's been able to tell, it doesn't make enough of a difference to bother with. It's also hard to rotate stock when you have four casings, each at a different stage, and only one big fruiting chamber.

Good luck!

-Diploid


--------------------
Republican Values:

1) You can't get married to your spouse who is the same sex as you.
2) You can't have an abortion no matter how much you don't want a child.
3) You can't have a certain plant in your possession or you'll get locked up with a rapist and a murderer.

4) We need a smaller, less-intrusive government.

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Re: case misting question [Re: Diploid]
    #1351354 -

my friend's experience is the same as Diploid's for 50/50+ casings of brf and wbs. he always used 87% rh from casing birth until finish with great results.


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Shopping for your head? Visit HeadShopFinder.com or find Online Head Shops.

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Re: case misting question [Re: dog]
    #1351451 -

Quote:
Same thing.


not exactly. for all intents and purposes the term "humidity" means "relative humidity (rH)" for us. "humidity" is an ambigous term. there is such a thing as "absolute humidity (aH)". rH is a ratio while aH is a defined number. Absolute humidity is the mass of water vapor divided by the mass of dry air in a volume of air at a given temperature. The hotter the air is, the more water it can contain. Relative humidity is the ratio of the current absolute humidity to the highest possible absolute humidity (which depends on the current air temperature). An example would be 1 cubic meter of air at 30 degrees celsius. It has a maximum absolute humidity of 30 grams. The aH would be calculated by dividing the mass of dry air by the mass of water contained within it (a maximum of 30g per cubic meter at 30 degrees celsius). Relative humidity would be the ratio of this calculated absolute humidity to the maximum absolute humidity (30g). Therefore rH is expressed as a fractional or percentage value and aH is expressed in a whole number of mass (in grams) per cubic meter. The most important aspect of this for a mycologist is the fact that warmer air holds more water. There is another way to sucessfully measure rH. It involves a rather experimental approach. It involves taking two alcohol or mercury tube thermometers and placing a wet cloth over one thermometer's bulb and placing bothe thermometers in the same area to be measured. An air current is established to evaporate the the water off the cloth. The ratio of the wet bulb temperature to the dry bulb temperature is equivalent to rH. Hope that clears things up, hehehe.


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To be honest, I fear the OTD. ---TheMadConductor

Now I'm gonna have to start getting down on my knees and blowing mushrooms... ---RogerRabbit

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Re: case misting question [Re: Redstorm]
    #1351467 -

Quote:
No, no , no. Don't mist when you have pins. It will kill them.


And just where did you dig up this nugget of wisdom?


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Fascism (fash'izem) n. A governmental system marked by a centralized dictatorship, stringent socioeconomic controls, and often belligerent nationalism. see also: the Bush Administration.

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Re: case misting question [Re: debianlinux]
    #1351471 -

>The most important aspect of this for a mycologist is the fact that warmer air holds more water.

Nice try. Not quite true though.

The air has noting to do with that. It?s not the air that "holds" vapor, but it?s the water vapor pressure that is temperature dependant.

Read http://www.ems.psu.edu/~fraser/Bad/BadClouds.html .
A quote from there:
" To claim that a temperature-dependent holding capacity of the air caused the cloud to form in cold air is to get (approximately) the right answer for the wrong reason. It is like trying to reduce the fraction, 19/95, by imagining that you can cancel the 9s. The right answer ensues, but for the wrong reason."

>The ratio of the wet bulb temperature to the dry bulb temperature is equivalent to rH.

Again, not quite correct.
Yes, you can determine the rH by comparing the wet bulb and dry bulb temperature, but to say that the "ratio of the wet bulb temperature to the dry bulb temperature is equivalent to rH" is not correct.


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Grow Mushrooms from Spores - PF-Tek for Simple Minds

Edited by Anno (03/05/03 03:38 AM)

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Re: case misting question [Re: Anno]
    #1351649 -

gah, you got me on the vapor pressure. i had conveniently forgotten that part of my physics courses and demoted myself to grade school "theology". however, can you provide the proper method of using the wet bulb technique to determine rH? IIRC it is a matter of (wT/dT)*100. for example (29C/30C)*100 = 96%. i think you may be right though since the curve of vapor pressure plotted against temperature is not linear. however, i do not know the proper addition to the above formula (probably an additional constant that defines the sine of the curve).


--------------------
To be honest, I fear the OTD. ---TheMadConductor

Now I'm gonna have to start getting down on my knees and blowing mushrooms... ---RogerRabbit

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Re: case misting question [Re: debianlinux]
    #1351952 -

>however, can you provide the proper method of using the wet bulb technique to determine rH?

As far I rememeber the equations are rather difficult to solve, for the convenience one uses tablulated values.
Like here:
http://retirees.uwaterloo.ca/~jerry/orchids/wet&dry.html


--------------------
Grow Mushrooms from Spores - PF-Tek for Simple Minds

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Re: case misting question [Re: Anno]
    #1353198 -

Quote:
As far I rememeber the equations are rather difficult to solve, for the convenience one uses tablulated values.



You're right, it's a complicated problem from what I recall. Among other things that complicate the solution are the fact that vapor pressure vs temperature is not linear and to make things worse, the shape of the curve is a function of the absolute pressure. I think I'll just use a tabulation.

-Diploid


--------------------
Republican Values:

1) You can't get married to your spouse who is the same sex as you.
2) You can't have an abortion no matter how much you don't want a child.
3) You can't have a certain plant in your possession or you'll get locked up with a rapist and a murderer.

4) We need a smaller, less-intrusive government.

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