High-humidity conditions easily induce Pleurotus ostreatus rust spot

Pleurotus ostreatus is a bacterial disease prone to the growth stage of Pleurotus ostreatus fruiting body, also known as brown spot disease and yellow mushroom disease. Bacteria can produce toxins that cause lesions in the affected mushroom body. At the early stage of the disease, the size of the lesion is only the size of the needle tip, and the color is also light. Generally, it does not affect the value of the product. As the disease progresses, lesions increase and the color continues to deepen, often appearing as ellipses or spindles, or interconnecting to form irregular large plaques with rust-like yellow discoloration around the plaque. When the mushroom bed is seriously infected, the fruiting body is yellowed, the light-colored mushroom becomes a yellow mushroom, and the dark-colored mushroom is turned into a mushroom. The affected fruiting body shrinks dry, with poor color and low commodity value. The mushroom pleats that are severely damaged are distorted, and the spore powder that has not been completely released is trapped in the pleats. The cap will wrinkle and crack due to the gradual depression of the lesions, losing the value of the product.
This pathogen normally exists on normally grown Pleurotus ostreatus and its fruit bodies, but it must be pathogenic in high humidity conditions. According to the survey, when the temperature is higher than 18°C, the mushroom farm is poorly ventilated, and the water used for mushroom production is frequent. The bed bag often contains stagnant water, the mushroom body is in a state of wetness for a long time, and the mushroom bed is crowded. The excess water in the mushroom table cannot be very high. When it is distributed well, the disease is heavy and the condition deteriorates rapidly. Once the body of the mushroom is infected, there are usually obvious lesions within a few hours. In 1 to 2 days, other healthy mushrooms can be found. When the disease occurs mildly, the impact on the development of Pleurotus ostreatus is not obvious, but if the control is not timely, not only the disease condition of the mushroom is aggravated, but also the growth of Pleurotus eryngii is affected, and cross-infection of other diseases and insect pests is caused.
The occurrence of rust in the process of production of Pleurotus ostreatus should be enhanced ventilation, reduce humidity, while spraying with lime water, bleaching powder treatment. If the death of Pleurotus ostreatus is dead, or if the mushroom bed is seriously infected, remove all the fruiting bodies on the mushroom bed in time and scrape off the hyphae that are yellowing and aging in the surface layer. Clean the bed surface, dry it a little bit, and then sprinkle it on the mushroom bed. A thin layer of lime powder or a small amount of bleaching powder is used to reduce the number of pathogenic bacteria on the mushroom bed and prevent the rust spot disease from harming again after transfer.

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