2021-06-02
Common contaminants in black wood ear cultivation and their control:
1. Trichoderma occurs mainly in uncolonized substrate and uncleared wood ear bases. It spreads rapidly if untreated, preventing normal wood ear mycelial growth.
Control: sterilize the medium thoroughly. If Trichoderma appears during wood ear fruiting, the original article describes sun-drying bags for 1–2 days, then applying 0.2% or 0.1% potassium permanganate, or 0.2% carbendazim solution.
2. Mucor and Rhizopus restrict oxygen, compete for nutrients and water, and release toxins that affect wood ear mycelial growth.
Control measures are the same as for Trichoderma.
3. Neurospora mainly competes with wood ear mycelium for nutrients and can be a serious problem during bag preparation.
Control: avoid hot periods where possible and use bag-assisted inoculation to reduce cross-contamination. Remove Neurospora-contaminated bags promptly. The original article specifies disinfecting the area with 0.2% carbendazim or bleaching-powder solution.
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