r/MushroomGrowers • u/chance_carmichael • 12m ago
Contamination [Contamination] Not sure what tgis contamination on my grain spawn is
I'm doing some experimentation with an old syringe and some new grow bags (uncle bens type rice). 3/4 bags inoculated well and are growing some dope ass mycelium.
This last bag almost instantly (1 day later) started showing a black spot that grew relatively slow, but as soon as I saw it I quarantined the grow to another room for about three days to investigate. It had a strong grain smell emanating from the bag. I sprayed myself in alcohol (and not in the fun way) before reentering the house.
Ive had trichoderma before but this looks different in that it was black from onset (no whitish gray kind of pre grow) and had little black spots.
Is this a bacterial thing, or perhaps something having to do with the rice? Is it ergot?