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gray beard stubble
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January 7, 2012
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maf
Tomatovillian™
Join Date: Jun 2010
Location: England
Posts: 512
Not much info to go on, but I would suggest checking out Botrytis (grey mould or gray mold) and see if it matches what you see as "gray beard stubble". Common in greenhouses when the conditions are humid and cool.
maf
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