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Offlinephonphan
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Registered: 09/23/05
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Last seen: 16 years, 8 months
cordyceps
    #4981446 - 11/25/05 09:33 PM (18 years, 2 months ago)

Is it possible to cultivate cordyceps? Are spores/spawn available anywhere?


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Offlinesocialnorm77
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Re: cordyceps [Re: phonphan]
    #4981753 - 11/25/05 10:42 PM (18 years, 2 months ago)

yes there are a couple of companies that cultivate. How they do it though is beyond me.
www.mushworld.com has some photos I think
Writer: Gwang-po Kim / Date :2000-07-16 / hits: 645
Cordyceps sinensis can be used as food and medicine. In China and Japan, these mushrooms are highly valued as medicine and health food in general.

Until recently, the supply of Cordyceps relied mostly on harvests of naturally grown mushrooms; however, as the demand for the mushrooms shows a constant increase in the world market, the existing supply has become scarce.

There is an active movement for research and development of mushroom resources in the fields of artificial culture, liquid fermentation, and application of new techniques.

It is not easy to from mycelia through artificial cultivation of Cordyceps mushrooms because of the complex environmental conditions that affect the host insects' ecological surroundings directly or indirectly must be regulated precisely, not to mention the ecological conditions suitable for the mushrooms.

*On occasions change in temperature, to a lower degree, is necessary.
The Cordyceps bacterium prefer relatively low temperature, about 15~20'C, and form sclerotia at a degree between 10~20'C, and stroma at 14~25'C.
It demands higher temperature for the stroma to grow on the ground surface, about 26~32'C, and spores are released at 28~32'C.

*Humidity conditions should meet each of the following conditions.
- Air humidity 80~90% for growth, stroma formation, and releasing of spores.
- 50~80% air humidity, and water content of ground 40% for hibernation of the infected host insect.
- For the growth of mycelia in the host's body, 60~70% humidity.
- Sclerotium can be formed only in dry environments, at about 10~20% humidity.

* As for air conditions, most of the Cordyceps bacterium are aerobes, but for some facultative anaerobes, oxygen should be regulated.

*Different light conditions are demanded according to different growth stages.
- Light is not required for spore germination or for mycelial growth.
- For the formation of sclerotia and stroma, a little bit of light is required.

*Acidity conditions
- Cordyceps grow in low-acid conditions.
- Mycelial growth takes place between pH 5.0~6.5 acidity, and it shows the fastest growth rate at pH 6.0~6.3.



American type culture collection sells a couple different species.
http://www.atcc.org/

cheers- norm


Edited by socialnorm77 (11/25/05 10:45 PM)


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