2021-06-02
After oyster mushroom inoculation, failure to germinate without visible contamination, or yellowing and withering mycelium, requires early preventive action.
Main causes:
First, the spawn may be old and have low vigor.
Second, the spawn may be scorched by an alcohol-lamp flame or hot inoculation tools.
Third, high temperatures may damage the spawn and cause overheating.
Fourth, improperly treated raw materials that have not been spread out and sun-dried may retain harmful microbial metabolites.
Fifth, delayed sterilization after filling can cause the substrate to sour or smell, producing growth-inhibiting substances.
Sixth, excessive lime can make the substrate too alkaline.
Seventh, excessive pine, fir or cypress sawdust may introduce aromatic oils and other substances that inhibit growth.
Eighth, excessive urea or other chemical fertilizer may release enough ammonia to inhibit germination. Prevention: use vigorous spawn around 20–25 days old; inoculate in cooler mornings or nights, improve cooling and ventilation or delay production during heat, and avoid scorching mycelium. Add gypsum appropriately and sterilize promptly after filling. Keep lime near 2%. Use sun-dried, mold-free materials; weather pine, fir or cypress sawdust outdoors for over six months to reduce inhibitory oils. Match supplements to the materials and keep urea at or below 0.1%.
Hubei Changyin Edible Fungi Machinery Co., Ltd. supplies bag filling machines, clipping machines, dryers and other mushroom equipment to customers across China, supported by after-sales service.