Symptoms of the onset of symptoms in the stipe, mushroom umbrella, bacteria pleats formed brown spots, and depression, mushrooms often lose their toughness, showing deformity. Mushrooms will rot when severe. Mushroom disease more deformed, the edges of the mushroom umbrella sawtooth, or stipe bent, some shaped like garlic, stipe thicker than the cap. In the disease on the big mushrooms produce more local brown spots, mushrooms later dried, leathery, in the disease Department of gray mold layer. The difference with white rot is that the mushroom rots slowly and does not emit brown mucus, nor does it have a foul odor. In the early stages, white rot disease was similar to brown spot disease.
The primary source of dissemination of circulating bacteria is usually from covered soil, and the carrier soil is the main source of disease. Subsequently, pathogenic spores on diseased mushrooms are mainly transmitted through the air flow; manual operations such as hands and tools can be transmitted when they are contacted with mushrooms. The disease is mostly from the residue after mushroom harvesting. It is mainly infected from the broken end of the stipe, and spreads afterwards.
Disease conditions The degree of occurrence of diseases is closely related to temperature and humidity. Factors such as high temperature of the mushroom bed, poor ventilation, and dampness, as well as the accumulation of contaminated waste on the mushroom bed, can all lead to the occurrence of diseases.
Control methods 1, timely removal of mushrooms. When the mushroom is found, the mushroom should be excavated, burned or buried deep together with the mycelia and the culture material at a depth of 10 cm. The diseased hole should be filled with disinfectant. At the same time using formalin disinfection tools to prevent infection. 2, reduce the temperature and humidity. Ventilate the window without cooling the mushroom house to lower the temperature and humidity. Control air humidity so that the relative humidity does not exceed 95% and lower the temperature to below 17°C. 3, chemical control. In order to prevent the occurrence of diseases, the surface of the cover soil was sprayed with a 1:1:300 Bordeaux mixture before the mushroom was grown, which greatly reduced the infection rate. 100g carbendazim or 200g thiophanate-methyl 100-150kg water can also be used to spray the surface of the mushroom bed. 4, other. If the above measures are adopted, the disease will continue to develop. The cover soil can be completely removed, the disease-free soil can be replaced, the cover can be re-covered, and the pathogenetic factors can be controlled.
The appearance is tan, and the cork is red-brown at the flaking; there are intermittent stripes on the branches, nodules are enlarged, and the shape is like a bead. Most of the hard and delicate roots and fibrous roots are born, and some surfaces are smooth and smooth, such as stalks. It is commonly known as "crossing the river branches" or "crossing bridges"; there are brown scales on the upper part, and there are residual stems or petioles that have not been cleaned at the top. The quality is firm and hard, the section is irregular, the skin is dark brown, the wood is golden, the rays are cracked, the central pith is red and yellow, and occasionally hollow. Odorless, very bitter taste, chewing saliva can be dyed red and yellow. It is better to use fat, beaded, solid, red-yellow, no residual stems and fibrous roots.
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