On Sunday, when the reporter bought flat mushroom at the Liulishan vegetable market in Jinan, he asked the stall owner, "Comrade, how much is a pound of mushrooms?" The stall owner answered "2 yuan 1 kg." "Mushrooms are expensive?" the reporter asked. The stallholders said: "Now the mushrooms are expensive, because the diseases of the mushrooms are heavy this year, and many mushroom sheds are no longer fruity due to diseases and the economic losses are large." In response, the reporter consulted the experts of edible fungi in Shandong Province and discussed the symptoms of mushroom and the corresponding prevention and control measures against the six main infestation diseases of mushrooms this year.
Brown rot mushroom was infested when young and could not be differentiated. In the later period, it formed an irregular gray “swollen head”, such as a very thick cap, such as a fistula, or a stipe cap, which was difficult to distinguish, and was born on the surface. Layer "white hair", when the temperature is above 20 °C, 4 to 5 days mushroom color darkens, followed by rot, oozing brown, soy sauce liquid juice, and rot, stink; if the shed temperature is lower than 20 °C, the The process is longer and takes about 7 days or more. When the fruiting body was infested during the middle growth period, a brown spot appeared on the surface of the cap, and the stipe was thick and plump, followed by the mushroom body becoming soft and oozing dark brown droplets. The internal tissues of the cut mushroom changed from white to white, and the body of the mushroom turned to blackish brown after soft rot. Odor was emitted. Its main pathogenic spores spread through the air and human, tools and other channels.
Prevention and control measures: Clean up environmental sanitation. Last year, after the old mushroom shed was re-used, it was able to remove a layer of wall skin before it was re-used. Then it was piled on the straw and burned, and then it was re-clamped and sprayed again with carbendazim solution. The dosage was 100 square meters. Rice sheds use 50% carbendazim powder 1 kg, about 80 kg of water, spray evenly, and can be used after 2 days. At temperatures below 13°C, bacterial damage can be inhibited. Curing material surface 0.2 ~ 0.3 cm thick, carpet spray 70 ~ 100 times to get rid of trace solution, can effectively inhibit or kill part of the pathogen. Can also take preventive measures, after the bag into the shed or after sowing, spraying 100 to 150 times the disease without a trace solution, enhance once before mushrooming, the initial incidence of continuous spraying 2 times, the effect is very good.
In the early onset of brown spot disease, the original mushroom base can be deformed. When the young mushroom is invaded, brown streaks can be formed on the stipe or base, brown spots are covered on the cap, the mushroom grows to the side, and the mushroom is cut. Observe that the inside of the tissue is yellow-brown, dry and loose, and the mushroom body is not rotted and odorless. The disease may be caused by the germination of pathogenic spores that remain in the soil and floating in the air at the time of initial disease, and the rapid spread after the onset of disease is transmitted through the body, tools, insects, and even splashing water when spraying water.
Control measures: Treatment of mushroom sheds can refer to brown rot. The production of Agaricus bisporus promotes the secondary fermentation technology; the earth-covered materials should be sterilized regularly; after the bacterium bags are put into the shed or after the Coprinus comatus and the Agaricus bisporus are covered with soil, carpet-type spraying is repeated 150 times without any trace; in the early stage of disease, 100 times of continuous spraying is used. The disease goes without trace 2 times or more; when the damage is severe, all the mushrooms are cleaned up, the water is stopped, the ventilation is dry, the mushroom is burned, the material surface is cleaned and brushed 50 times without any trace; for all the tools and materials that may carry the bacteria All were washed with 600 times carbendazim solution.
Soft rot, also known as downy mildew, etc., after the onset of disease, the mushroom bed is covered with pale hyphae of pathogens, and becomes dark grayish green or dark brown. The edible fungus mycelium lacks oxygen and is invaded by the secretions of pathogenic bacteria and loses its vitality. It is difficult to produce mushrooms. The fruiting bodies that have occurred before the disease is severely damaged first attack from the base and extend upwards to the cap of the mushroom. At the initial stage of the cap, there are water-stained lesions of different sizes, which are then covered by the bacteria. Death, the last rot, touch down. Its pathogens are spread through earth-covering materials, water, insects, and the body and air.
Prevention and control measures: Mushroom treatment can refer to the foregoing. Strengthen the improvement of the ventilation condition of the mushroom shed to minimize the surface humidity of the bacilli or fungal wall, especially after the artificial water spray, the ventilation of the base should be timely; the pH of the base material should be adjusted to 7 or so, and the alkali-resistant species can be adjusted to 9 or so; at the early stage of disease, when pathogenic bacteria on the surface of the mushroom bed are visible, 100 times more disease can be sprayed without trace; when the disease is severe, a small amount of lime powder can be applied in the ward; when a large area is damaged, Mushrooms can be removed and cleaned material surface and cover material, after spraying 100 times to go without a trace, replace the newly treated casing material, and then spray 150 times to get a trace solution to prevent disease.
Symptoms of rust damage are the formation of round or oval rust-colored spots on the surface of the cap. The edges of the lesions are neat, with depressions in between. After the spots shrink, the caps crack, forming asymmetrical fruit bodies. Little infection, basically no infection on the pleats. The disease is a bacterial disease. All kinds of raw and auxiliary materials, earth-covering materials, and water have its pathogenic bacteria. When the temperature is above 15°C and the air humidity is more than 85%, the bacteria are extremely active. They pass through the human body, air flow, insects, and tools. It is easier to induce the disease when it is carried by other channels, especially when the humidity is high and the ventilation is poor.
Prevention and control measures: The mushroom shed should be thoroughly disinfected before it is used; the base material should be cooked evenly when cultivated with the fermentation material; the bacteria should be persistently sprayed and the mushroom should be sprayed for a preventive purpose; the initial disease should be sprayed with 150 times the mushroom. Kill the disease solution can be; when the disease is severe, you can remove the mushrooms, clean the material surface, the system of about 70 times the mushroom killing disease solution continuously sprayed more than 2 times; daily management, should keep the air humidity at about 85%, Do not be too high, and adhere to reasonable ventilation, especially after water spray, the water surface of the cap should be evaporated within 1 hour, otherwise, stay too long and easy to induce the disease.
In the early stage of macular infection, there is a small spot-like yellowish spot on the cap of the bacterium. As the fruiting body grows, it expands the range and infects other fruiting bodies, followed by deepening of the color and expansion to the entire cap, and yellowing of the mushroom body in the late stage of infection. Brown beads, the diseased plants stopped growing, followed by atrophy and death.
The pathogen is in a high-temperature and high-humidity environment, especially when the temperature is stable above 20°C, the humidity is above 95%, and the concentration of carbon dioxide is high. This disease can easily be induced; when water is not clean in the base material and mushroom shed, the disease is The incidence rate is also high.
Prevention and control measures: Strengthen ventilation to reduce the carbon dioxide concentration in the shed to less than 0.5%; reduce sheds' wetness, especially in the season or time period in which insulation is needed, control the air humidity to be about 85%; in the initial stage, spray 70 times the mushroom killing spirit Or yellow mushroom a spray solution 2 times, can effectively inhibit; after the onset of disease, should remove mushrooms, combined with cleaning the material surface and cleaning, the system of 50 to 70 times the mushroom killing disease solution continuous spray 2 to 4 times . However, it should be noted that after spraying, it should be sealed for 1 to 2 hours, and then ventilation should be strengthened to reduce the temperature of the greenhouse.
Coloring disease mushroom mushroom cap from gray brown, dark brown into part or all of yellow, yellow or tile blue, so that the growth of fruiting body is inhibited, the long speed was significantly slowed, grow into a deformed mushroom or caps shrink upturned, serious Affect product quality.
Prevention and control measures: The cause of the disease is that when the coal stove is used to raise the temperature in the low temperature season, the concentration of carbon monoxide and carbon dioxide in the shed is high. After the fruit body inhales this type of gas, it forms short-term poisoning symptoms, but the cap (especially the edge) changes color; the quality is not good. Some chemical substances in plastic shed membranes are precipitated by condensed water and then dripping on the fruit bodies. Such diseases may also occur, often causing the yellow color of the bacteria to become the coke color; some of the drug residues in the earth-covered materials, The drug residue in the sprayer and the intrusion of certain harmful gases from the outside can also cause this problem to occur. Mushroom farmers should find out the cause of the disease according to the specific conditions of production, and can solve the problem by using the right medicine. Do not use drugs blindly.

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