Causes
1. The species are poor; 2. The cultured mycelium is over-temperature or aging; 3. The medium is not properly formulated, malnutrition or nitrogen source (wheat bran, soy flour, etc.) is excessive; 4. The raw material is too fine, bagging Too tight, the medium is not gas permeable.
Control measures
Strictly control the strains, do not buy counterfeit strains, do not use grain strains, and prevent radiation exposure (such as railway safety inspection facilities). Breeding bacteria to prevent over-temperature, prevent hyphae from slow feeding and prolong the period of cultivation, strict formulation of ingredients, no need to use fine raw materials, bagging should be standard.
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