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OfflineOLD_NEWBIE
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Registered: 10/12/01
Posts: 65
Last seen: 16 years, 5 months
What is overlay?.
    #521336 - 01/15/02 09:09 AM (16 years, 9 months ago)

Hello Everybody,
I've done just about all the reading i could but keep cumming accross the word "OVERLAY". My problem is i can't find a meaning for this word. So what is overlay?, Please help.
Thanks all.


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OfflineMitchnast
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Registered: 10/28/99
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Re: What is overlay?. [Re: OLD_NEWBIE]
    #521338 - 01/15/02 09:14 AM (16 years, 9 months ago)

whats the meaning of the word? hmm, well, its a cover, and sort of self-explanitory. its of germanic origin with "over" from the root "uber" meant over... and Lay from Lie meaning to lay.
so its anything that covers up something, in mushroom cultivation it means the mycelium that emerges through a casing and "overlays" the substrate :)
another example of overlay could be snow or volcanic ash


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Invisibledimitri211
Carpal Tunnel
Registered: 04/27/01
Posts: 2,248
Re: What is overlay?. [Re: OLD_NEWBIE]
    #521392 - 01/15/02 05:39 PM (16 years, 9 months ago)

Overlay is the condition which results when mycelium has been allowed to completely cover the casing surface. It is caused by prolonged vegetative growth temperatures, high CO2 levels, and excessive humidity. If overwatered, the overlay will become matted, or, will form a dense, dead layer of cells on the casing surface.

A casing showing signs of overlay will begin to shrink and pull away from the sides of the container. It will also become unreceptive to water, and puddles may form on the surface after misting. If any pinheads form, they will likely do so at the edges of the casing. Most of the pinheads will abort, and only a few mushrooms will fully mature. Once this has happened, the casing layer really isn't a casing layer anymore. It is no longer serving it's three main functions, and has in essence become a second layer of non-nutritious substrate.

Thanx Ralph


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OfflineAnnoA
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Re: What is overlay?. [Re: dimitri211]
    #521856 - 01/16/02 01:51 AM (16 years, 9 months ago)

>and excessive humidity. If overwatered, the overlay will
>become matted, or, will form a dense, dead layer of cells on
>the casing surface.

According to Paul Stamets it?s caused by a too dry casing, not by too wet.

Quote:
"Overlay is a dense mycelial growth that covers the casing surface and shows little or no inclination to form pinheads. Overlay directly results from a dry casing, high levels of carbon dioxide and/or low humidity. "


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Offlinedarkestmage
Medical Student / Ski Bum


Registered: 06/18/09
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Re: What is overlay?. [Re: Mitchnast]
    #11161929 - 10/01/09 04:39 AM (9 years, 21 days ago)

Quote:

Mitchnast said:
whats the meaning of the word? hmm, well, its a cover, and sort of self-explanitory. its of germanic origin with "over" from the root "uber" meant over... and Lay from Lie meaning to lay.
<br>so its anything that covers up something, in mushroom cultivation it means the mycelium that emerges through a casing and "overlays" the substrate :smile:
<br>another example of overlay could be snow or volcanic ash




aka i have no idea what it is, either.


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OfflineNibin
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Registered: 11/29/05
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Re: What is overlay?. [Re: darkestmage]
    #11162021 - 10/01/09 05:25 AM (9 years, 21 days ago)



--------------------
Newcomers guide-----> For all things shroomy


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Offlineveda_sticks
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Re: What is overlay?. [Re: Nibin]
    #11162154 - 10/01/09 07:06 AM (9 years, 21 days ago)

overlay - a condition of casing layers that too many people worry about and too many post "overlay!!!HELP! and that should be banished from the forums.

Too many people think overlay is a heavily colinised casing layer, which it isnt.


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Mushrooms, Mycology and Psychedelics >> Mushroom Cultivation

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