Preventing the occurrence of miscellaneous bacteria is an important part of the production of edible fungi, and the following aspects should be done:
Choose good strains
In the production, the strains with high purity, appropriate bacterial age, vigorous vitality and no contamination by miscellaneous bacteria should be selected. In addition, in the cultivation process of edible fungi, purification and rejuvenation should be carried out regularly to maintain the original excellent characteristics of the fungus.
Prepare suitable culture materials
Since most edible fungi prefer a more acidic environment, the PH value of the culture material is appropriately lowered, which can inhibit the propagation of mixed bacteria. In the medium containing starch and soluble sugars such as wheat bran and rice bran, mixed bacteria can easily survive. However, in the sawdust culture, the mixed bacteria will be inhibited due to the lack of available enzyme systems and cannot survive.
Improve vaccination methods
When cultivating edible fungus with raw meal, increase the inoculation amount of 5% -10%, and inoculate 2/3 of the fungus on the covering surface and the surrounding, which is conducive to the mycelium to occupy the surface layer of the culture medium as soon as possible and improve the ability to resist mixed bacteria. During the inoculation of Duanmu, the hole distance should be properly reduced, and one hole should be inoculated at both ends of Duanmu, which can avoid the invasion of bacteria and accelerate the growth of hyphae in Duanmu.
Create a suitable environment
During the cultivation of edible fungi, a lower temperature may be required according to the majority of strains (weeding mushrooms), and most of the mixed bacteria prefer high temperature characteristics, and an appropriate cooling culture method is adopted. From the perspective of humidity, the edible mycelium requires a lower air humidity during the growth stage, and the mixed bacteria requires a high humidity environment, so the air humidity should be controlled below 60% during the growth of the mycelium.
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