During the cultivation of Pleurotus ostreatus, hyphae grow vigorously (white and dense), fruit bodies are difficult to form, there are no mushrooms, or there are few mushrooms. Mushroom farmers often call them long white hairs. This can be done as follows: Adjust the temperature Pleurotus ostreatus can be controlled at about 25°C during the day, and the low temperature Pleurotus ostreatus can be controlled at about 10°C during the day. Increase the temperature difference between day and night in the appropriate temperature range to stimulate the growth of mycelium. The relative humidity is controlled at 85% to 95% when the humidity is controlled. The low-humidity fruit body develops slowly, and the high-humidity fruit body is susceptible to ulceration and discoloration. Increase ventilation In the absence of oxygen, Pleurotus ostreatus is not easy to mushroom or mushroom, so increase ventilation, but do not blow the wind directly on the mushroom body. Mechanical compression uses about 100 grains of dry soil particles with a diameter of 1.5 centimeters per square meter, and evenly spreads them onto the hyphae, compresses the mycelia, and promotes the formation of fruit bodies.