Maybe this one? ....... an Aspergillus bloom in a batch of fresh chippings.
Not quite as I remember reading it...but it has been several years...pretty sure it was an older post...maybe 2014???? obviously on the old board.
Can't for the life of me remember who wrote it...anyway, they were thinking it was the wood chips either from the trimmer or from leaving in a big pile and using it later.
LofMc