The symptoms of mushroom disease
Yellow spot of Pleurotus ostreatus is a disease caused by Pseudomonas aeruginosa and Gram staining is negative. The disease is a bacterial disease, it widely exists in nature, it has damage to Pleurotus ostreatus and mushroom.
Symptoms: at the initial stage of infection, there is a small spotted yellow disease area on the cover, which expands with the growth of the fruiting body, and infects other fruiting bodies, then the color becomes darker, and then expands to the whole cap, the whole mushroom yellowing, and the diseased mushroom body is waterlogged, but it is not sticky and does not rot, especially the color difference is very obvious after the black Pleurotus ostreatus appears macula. In the later stage of infection, the mushroom body secreted yellowish-brown water droplets, and the diseased plant stopped growing, then atrophied and died. In severe cases, Pleurotus ostreatus all developed disease. The disease spot usually occurs in the superficial layer, and the fungus flesh which is more than 3 mm under the skin rarely changes color.
Etiology: culture materials, soil mulching and water for management are the main sources of mushroom bed bacteria, and air, insects, people and splashing water can also help it spread. High temperature and humidity are extremely conducive to the disease, and grow and reproduce faster, under suitable conditions can infect mushrooms and produce disease spots in a few hours. Especially when the temperature is stable above 20`C, the humidity is more than 95%, and the concentration of carbon dioxide is high, it is very easy to induce the disease; even if the temperature is about 15`C, but the temperature of the mushroom shed tends to be saturated and airtight, it also has a high incidence rate; it is also easy to occur when the culture material and the water in the mushroom shed is not clean; and in the spring and autumn when the temperature changes greatly, the disease is very easy to spread.
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Occurrence and control of yellow mushroom disease of Pleurotus ostreatus
In recent years, the planting area of Pleurotus ostreatus has been increasing, but due to poor management and poor disease prevention concept, the incidence of yellow mushroom disease is increasing year by year. Some mushrooms shed after a tide of mushrooms, do not produce mushrooms for a long time; some come out of small mushrooms before growing up yellow, and then atrophy death, resulting in a decline in the quality of Pleurotus ostreatus, the yield is difficult to improve. For this reason, the author studied the etiology and comprehensive control techniques of the disease, and the reports are as follows: 1. Symptoms. Yellow mushroom disease is mostly caused by young mushroom cover or small mushroom.
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Treatment of Water shortage of Culture material in the later stage of Pleurotus ostreatus
The output of the first stubble of Pleurotus ostreatus accounts for about 40% of the total output. Generally, after the second crop of mushrooms is harvested, due to the depletion of water in the culture material, it is rare to produce mushrooms again, the mushroom body is thin, the mushroom meat is loose and dry, and the taste is poor. In order to increase the yield, the following methods can be taken to supplement water and nutrient solution: (1) vertical bag hole irrigation method: the immersion method needs to use a container to hold water, but this method can be used because of the small container or other reasons. Stand the mushroom bag upright on the floor of the mushroom room, pull up the edge of the plastic bag, so as to store water after adding water, and then
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