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In a previous blog I wrote about 6″ diameter petri dishes that are so handy for storing large numbers of cocoons.  When you have a large number of cocoons, it is  wise to keep them refrigerated.  Refrigeration keeps them away from predators and keep them relatively safe. BUT I must reiterate that humidity has to be at least 60%.  In order for cocoons to survive, there has to be at least 60% humidity.  Any thing less than that will kill the bee over time.  Use a fridge  that you manually have to defrost .  These fridges keep humidity over 50%.  As a precaution keep a container of water inside the fridge.
Petri dish for storing 100-200 cocoons
A stack of petri dishes filled with cocoons are placed inside this fridge for storage.  Cocoons are then placed into release houses ready for release.
 
This is the freezer compartment in a manual-defrost type fridge.  The stack of petri dishes are just below this compartment.
Use a thermometer to let you know when temperatures are too warm or too cold.
A container filled with water ensures a greater than 60% humidity.
Release houses filled with 100 cocoons are held in the fridge, prior to  releasing into the D27 yurt.  The cardboard straw temporarily plugs up the front entrance of the Starter Cottage.

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