Trichoderma, also known as green mold, is widely distributed in various plant residues, soil and air. Trichoderma spores are spread by spores. They are often invaded into the medium by airflow, water droplets, insects, tools, and operators' hands and clothes. Once the conditions are appropriate, they will germinate and breed. Trichoderma has strong adaptability and rapid reproduction. It can secrete toxins and inhibit the growth of shiitake mushroom hyphae. Trichoderma can also grow on the mycelium of shiitake mushroom with weak growth potential, so that the cells of the shiitake mushroom dissolve and die. When the production environment is not clean, the culture materials are not completely sterilized, the inoculation operation is not strict, and the conditions are high temperature and high humidity, it will cause a good opportunity for the diffication of Trichoderma, especially for many years, the mushroom field and the mushroom shed, often the fungus Place.
Creating an ecological environment suitable for the growth of shiitake mushroom hyphae and not conducive to the proliferation of Trichoderma is a fundamental measure to control the hazard. In the event of a Trichoderma hazard, immediately ventilate and dehumidify to inhibit the expansion of Trichoderma. After the culture material in the germination stage is susceptible to the disease, the method of injecting the liquid solution can be used to inhibit the damage of the wood mold. The commonly used agents are stone carbonate, formaldehyde, carbendazim and methyl thiophanate. In addition, the white and gray surface of the pollution site, the control effect is also very good.
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