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If you were to return home from work to find you lovely pleurotus Pulmonarius looking like this...
what would your first thought be??
My first thought is that the humidty/moisture is wrong as the mushroom shrivelled onto itself - as you would imageine a dried up mushroom to do - the humidity has been around 80 - 100% and maybe been down as far as 70 for a short while.
could you offer any advice as to what could be the problem?? or if I should just try and maintain a more constant high % humidity.. cheers Jim
Looks like you're using cakes too. There's a lot of information on growing oysters on cakes and some of it is relevant to living in a dry climate such as yours, here: http://www.shroomery.org/forums/showflat.php/Cat/0/Number/3929864/an/0/page/1. From what I can tell oysters show coral growth when they have too much humidity and full mushrooms eventually cup and shrivel in the absence of humidity with mycelium growing on the cap and stems. They yellow and shrivel with over exposure to CO2 and they are very sensitive to CO2. It's hard to tell from your picture what's going on but if it's starting to fold and mycelium is consuming the mushroom itself then you may need more humidity. Unfortunately this poses a problem in arid climates because you also need good air exchange. You might need to try a cool mist humidifier setup or use an air pump/bubble stone/bowl of water to increase oxygen exchange. Those oysters like a lot of air and just enough moisture. I'm having to start over with mine. Lesson learned.
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Extremely thick tapered stems and tiny caps with no air exchange at all but a little light. Coral formation in High CO2 and no light. Shriveling of caps and stems in low humidity. Your humidity would probably be the culprit if this has happened over a few days. You should be maintaining 95% RH or higher. Mist whatever container you are fruiting in and see if the mist evaporates. If it does, your humidity isn't high enough.
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Agreed. Oysters want as close to 100% humidity as you can get, so mist often. They also want massive amounts of air exchange, which lowers your humidity. Mist again after each air exchange. A misting nozzle on a timer is a great investment for oysters. RR