Prevention and treatment of mycelial death of Pleurotus ostreatus during growth period
The exuberant mycelium of Pleurotus ostreatus is white, sturdy and dense, and develops forward in a fan shape. Some mycelia suddenly yellowed about 10 days after inoculation and gradually died and disappeared. For this phenomenon, some mushroom farmers think that the greater the water content in the culture material, the higher the yield, and increase the water content when blending. There are also some mushroom farmers do not understand the meaning of water content, mistakenly for culture material water content of 65%, for every 100 kg of material plus 148 kg of water. The correct method of calculating the water content of the culture material should also take into account the water content of the culture material itself. generally, the water content of the culture material is more than 10%. If the culture material is too wet and exceeds the limit of mycelial growth, it will lead to poor air permeability and hypoxia. A large number of moisture-loving and anaerobic bacteria will breed, resulting in the death of Pleurotus ostreatus mycelium. In addition, the temperature is too high, disinfection is not strict, there will be bacterial contamination. Pleurotus ostreatus is tolerant to low temperature but not to high temperature. the mycelium grows slowly when the temperature is more than 28 ℃, but the bacteria multiply in large numbers at high temperature, and can secrete toxins (pungent smell) in the process of growth, which can inhibit and kill the hyphae of Pleurotus ostreatus.
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Control measures of truffle disease of Pleurotus ostreatus
(1) the symptom of the disease is similar to that of Pleurotus ostreatus hyphae, which is indistinguishable to the naked eye; it can go deep into the substrate, compete with Pleurotus ostreatus hyphae for nutrition, water and bottom-up space, and inhibit the ability of Pleurotus ostreatus to produce mushrooms. Its physiologically mature mycelium forms ascomycetes on the mushroom surface of the culture material, especially in the area around the fungus column in contact with the soil during border planting; the ascomycetes in groups or aggregates are brain-shaped wrinkles in shape, very similar to walnut kernels removed from astringent skin, wrinkled and not stretched; at the beginning, most mushroom farmers mistakenly think that Pleurotus ostreatus is budding.
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High-quality and high-yield techniques of bag cultivation of Pleurotus ostreatus by microporous bacteria infiltration irrigation
During the growth period of Pleurotus ostreatus, there are usually some problems, such as inconsistent bacteria growth rate in the bag, too long bacteria generation period, high pollution rate, slightly higher bacteria wall in the mushroom emergence period, and serious water supply difficulties in the bag after the second stubble mushroom is harvested, which seriously affect the yield and quality. In recent years, the new technology of microporous bacteria and infiltration irrigation of Pleurotus ostreatus has been successfully studied in production, which has effectively solved the above problems. Microporous bacteria. The selection, proportioning, mixing and fermentation of culture materials are the same as conventional, but the difference is that three layers of needle holes are pierced on the bacterial tube with a sewing machine before bagging, which is used as an empty supply during the mycelial growth period.
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