The quality of strains is directly related to the success or failure of mushroom cultivation. When buying strains, we must pay attention to the identification specifications and quality. The methods for identifying high-quality bacteria are introduced as follows: The bottle (bag) of the species to be investigated and sold shall be intact and tightly packed at the mouth; the tampon shall be clean, dry, elastic and suitable; flexible; the column of bacteria shall adhere to the bottle wall, and the upper part A small amount of condensate is allowed on the inner wall, and there is no water accumulation in the lower part. There must be no gel between the bottle wall and the culture medium. The observation of the color through the strainer bottle (bag) observes the internal hyphae, and the hyphae of the fine strains should be strong and white, uniform from top to bottom, no spotted; no red, green, black, yellow and other alien sphaeroides should be allowed to fall. Except special pigments). The nose smell opens 1-2 bottles (bags) of tampon smelling its odor, excellent bacteria species should have a special aroma of bacteria, no sour odor. When touching the excellent strains for inoculation on the knocked or broken bags, the strains should be uniform and flexible; when they are diced into small pieces, the broken pieces will be small, no exudate will be present, and the mycelium will be consistent in appearance. Look at the packaging sold bacteria must be affixed with a quality label, the label should have the name of the species, grade, date of inoculation and production units. Non-standard strains are generally unlicensed, and there is a high possibility of counterfeit products. When buying strains, ask the seller for an invoice so that they can negotiate if there is a problem.
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