How to prevent and control contaminants in oyster mushroom cultivation? Covering with burnt mud ash is effective

Bed-style cultivation of oyster mushrooms: When bed-style cultivating oyster mushrooms, if contaminants appear sporadically on the surface of the substrate, they can be eliminated by smearing or covering the affected spots with thick quicklime slurry; if contaminants appear in large amounts on the substrate surface, cover the contaminated part with 2-3 cm thick burnt mud ash, making the covered area larger than the contaminated area, and pat it slightly firm to eliminate the contaminants; if contaminant contamination on the substrate surface is severe, cover the entire substrate surface with burnt mud ash and pat it firm, and after a few days the mycelium will resume normal growth.

Bag-cultivated oyster mushrooms: first pick out the bags contaminated by unwanted organisms, then dig a soil pit about 60 cm deep in a place with relatively high ground, with the pit size depending on how many contaminated bags there are; water must not accumulate in the pit, and lime powder should be scattered on the pit bottom and surrounding walls. Place the contaminated parts of the bags facing down into the pit and arrange them well, without removing the bags, then cover the bags with 10-15 cm thick burnt mud ash, and fill the gaps with soil. After 15-20 days of cultivation, all contaminated bags will return to normal and the mycelium will be fully grown; at this point the bags can be moved to the mushroom yard, opened, and allowed to fruit.