Pay attention to purchasing edible mushroom stock

Through the investigation of Pulandian and its surrounding areas, it is found that most mushroom farmers do not buy cultivated seeds for direct cultivation, but buy original seeds for self-propagation and cultivation. Although this can save costs, but in the purchase should pay attention to the following points, so as not to cause unnecessary losses.

1. Ask the age of bacteria when purchasing the original seed, first ask the age of bacteria, the age of bacteria directly affects the quality and yield of cultivated seeds.

2. The appearance of the original seeds of different culture materials is different, such as the appearance of grain seeds is thicker and whiter than that of forage seeds, and the forage seeds with more wheat bran, soybean flour, corn flour, etc. grow stronger than those with less of these auxiliary materials. Do not influence the judgment of strain quality because of the rich or poor nutrition of culture medium. According to the different culture medium to judge the quality of bacteria. In addition, the relatively nutrient-rich culture medium strain aging quickly after completion of culture, should not be stored for too long.

3. Appearance observation includes external phase, appearance, growth, color and other aspects of observation.

Observation of external phase: carefully check whether hyphae are plump and whether thalli are plump and fresh. If the hyphae dry, it may be a bad variety, or too long age; if the thalli dry shrinkage indicates that the age is too long, the strain aging.

Appearance observation: carefully observe whether hyphae are uniform and tidy. If hyphae are scattered, it may be a bad strain.

Color observation: color should be pure, and consistent, otherwise can not be used. By color observation can judge the age of strains and whether there is pollution. Old skin, yellow water, plaque and thalli shrinkage often appear in aged stock. Contaminated mold species, can see contaminated colonies from its surface, even if these colonies have been covered by edible fungi, if carefully observed, can still see its footprints. If the colony of contaminated bacteria is on the surface, its original color can be seen under the mycelium of edible fungi, or it is manifested as uneven aerial mycelium of edible fungi on the surface; if the colony of contaminated bacteria is formed around the strain, obvious yellow antagonistic lines between the colony of contaminated bacteria and the mycelium of edible fungi can be seen. After some edible fungi are contaminated, they can still continue to grow, such as Pleurotus ostreatus, and the mycelium and sporangia of Mucor can be covered. Once the species are full, inexperienced people often regard such species as normal species. In this case, careful observation, can be seen hyphae distribution is chaotic, and the color is darker or slightly yellow, there is no normal species as neat bright and full appearance.

Take out inspection: When purchasing original seeds, it is best to take out representative strains and open the cover to dig out, one is to smell the smell, whether there is a strong mushroom fragrance; the other is to see whether the hyphae are closely connected. If the mushroom fragrance is light or the hypha connection is not tight (when digging, it feels very loose, and the strain can be broken and dug out without effort), it is not an excellent seed.

Some mushroom farmers also often order original seeds from reputable scientific research units or colleges and universities in other places and even specialized agencies for culture preservation and management. Mail order stock should be carefully checked for damage, bottled stock should be carefully checked for bottle mouth, bottle cap and bottle stopper, bagged stock should be carefully checked except for bag mouth, and special attention should be paid to plastic bag for worn trachoma. Before inoculation, wipe and disinfect the outer surface of the test tube and bottle. After opening, burn and wipe with 75% alcohol cotton ball on the flame of alcohol lamp. This kind of double disinfection sterilization treatment, regardless of whether the strain has visible mold or not, should be strictly carried out.