Distinguishing the advantages and disadvantages of volvariella volvacea

The quality of volvariella volvacea should be identified before cultivation, and high quality strains should be selected as far as possible. The appearance of high-quality bacteria is as follows: the hyphae are stout, the upper and lower hyphae develop uniformly, and the aerial hyphae are white or translucent.

The specific identification methods are as follows:

First, the bacteria used for cultivation, the age of the bacteria is about 30 days, the hyphae are thick and white, and there are light brown chlamydospores on the hyphae. After pulling out the cotton plug, you can smell the fragrance of straw mushrooms. This kind of strain is a high-quality strain, which eats food quickly and grows vigorously after sowing. If there are few chlamydospores, the hyphae are still young and can be used again for a week.

Second, after the age of the strain is more than 40 days, the aerial hyphae are too dense, the quilt begins to appear, and the surface is light yellow. The chlamydospores are dense and reddish brown, and the mycelium activity tends to weaken. This kind of bacteria belongs to the old strain, so it can no longer be stored and should be used immediately, otherwise it will affect the yield.

Third, if the hyphae in the culture medium gradually become sparse, and the surface bacteria turn yellow, chlamydospores cover the material surface, and the mycelium begins to shrink after more than 50 days, which is an old strain, and its vitality decreases obviously, so it is no longer suitable to be used as a strain.

Fourth, all bacteria or cotton plugs found on the yellow, green, black spots, indicating that the strain has been contaminated by miscellaneous bacteria. This kind of bacteria belongs to inferior bacteria and must not be used.