What symptom does Flammulina velutipes bacterial spot disease have? How to prevent and cure?

Flammulina velutipes, also known as Pleurotus ostreatus, Flammulina velutipes, Pleurotus ostreatus and so on. Because of its slender stalk, like Flammulina velutipes, it is called Flammulina velutipes. In the specific planting process of Flammulina velutipes, it is easy to produce bacterial spot disease, also known as bacterial brown spot, once it occurs, it is harmful to the quality of Flammulina velutipes. What are the symptoms of Flammulina velutipes bacterial spot disease? How to prevent and cure? Let's take a look at it.

What symptom does Flammulina velutipes bacterial spot disease have?

The disease first occurs on the cover, with brown spots the size of sesame and mung beans, and irregular edges of the spot. Under suitable conditions, the spot rapidly develops into one piece, including the entire stalk, making the stalk all brown, soft, unable to stand upright, with mucus, and finally dark brown and even rot. It seriously affects the product quality and has become one of the main diseases in recent years. The cause of the disease is that the main mushroom houses use the materials used last year, the tools bring in the bacteria and the bacteria are artificially brought into the management. The humidity in the mushroom room is too high, poor ventilation is the inducement, the water on the surface of the cover, especially the cold weather spray cold water has an important relationship with the disease, the relative humidity is too high.

Second, how to prevent and cure the bacterial spot of Flammulina velutipes?

1. Keep the mushroom farm clean and hygienic, and remove diseased mushrooms and wastes in time; mushroom houses, bed frames, appliances, etc., should be thoroughly disinfected with 1:50 times of Venus disinfectant or 2% bleach before use, especially in mushroom sheds with serious primary diseases.

2. The culture materials of Flammulina velutipes should be sterilized thoroughly, the culture materials of mushrooms and Pleurotus ostreatus should be fully fermented and ripened evenly, and the soil-covering materials should be fumigated with formaldehyde.

3. When mixing the material, the verruca should be mixed with water according to the proportion of 1, 000 times, and the antifouling agents with high toxicity and high residue should not be used to ensure the production effect.

4. Flammulina velutipes mushroom temperature should be controlled below 15 ℃ during mushroom emergence period, avoid high temperature and high humidity season, strengthen ventilation and heat dissipation at high temperature, Pleurotus ostreatus temperature during mushroom emergence period should not exceed 18 ℃, if the temperature rises suddenly, cooling measures should be taken, such as opening window, uncovering film, shading, etc., but we should pay attention to the temperature fluctuation in the mushroom room should not be too large, to prevent water vapor condensation and produce water film.

5. when diseased mushrooms are found, they should be selected in time, increase the ventilation immediately, suspend or reduce the spraying water, quickly lower the temperature, and use medicine to control the degree of the disease. for example, 5% limewater can be sprayed on the material surface. It can also be sprayed with 100,200 units of streptomycin or 300 units of oxytetracycline per milliliter, or 1000 times of bleaching powder, once every 2 days, the mushroom bed will be stopped for 1 day before and after application, and the medicine can be used again at intervals of 3-4 days. Using it for more than 3 times can effectively control the spread of the disease. When the disease is serious, you should first remove the diseased mushroom, clean the material surface or cover the soil, and then spray according to the above method.