Brown spot disease is extremely harmful, how to prevent brown spot of fungus?

If there is such a situation, then you should spray some pesticides, and you should also pay attention to a reasonable management of the field at ordinary times, so as to ensure that such diseases can be avoided, which is likely to affect the yield of fungus.

Top dressing should be carried out in a timely manner, phosphate and potassium fertilizers should be supplemented in time, and problematic plants should be disposed of in a timely manner, and field management should also be carried out.

First of all, we must choose the right variety, and we must pay attention to ventilation, we must pull weeds, and apply fertilizer reasonably.

The spots that appear on the fungus may be brown spot, also known as red spot disease or sun spot. The disease can occur from seedling to harvest and mainly damages leaves. The leaves are purple-red water-soaked small dots in the early stage, concave, and then gradually expand, and develop into ** such as pie is gray-white to brown, the edge is purple-brown, and there are obvious round lesions, and the lesions are connected to each other to form large lesions when the skin is severe, but the lesions are not easy to perforate.

To prevent these spots from appearing in fungus vegetables, you can pay attention to the following:

1.Scientific fertilization: on the basis of sufficient basal fertilizer, during the growth period should also be top-applied fast-acting nitrogen fertilizer many times, generally after the seedling per 667 square meters of top-dressing urea 15 kg, phosphorus and potassium compound fertilizer 5-8 kg, after each picking should be topdressed, each time per 667 square meters of topdressing urea 15 kg.

2.Control humidity: Fungus should be grown at a temperature of 28-30 and kept at 18-20 at night.

The temperature is lowered 5-7 days before harvesting, and the temperature difference is kept at 24-25 during the day and 14-15 at night, so that the purpose of cooling is to make the fungus grow robust and increase the thickness and color of the leaves.

3.Keep spacing: Plants need to be kept at an appropriate distance from each other so that they don't get too dense.

Through the above measures, the appearance of spots on the fungus can be prevented and controlled to the greatest extent, so as to improve the quality and yield of the fungus.

It is brown spot disease, also known as red spot disease, sun spot, etc., from the seedling to the end of the harvest can occur, mainly harming the leaves, the leaves are damaged in the early stage of the source of purple-red water-soaked small dots, depressions, and then gradually expanded, developed into ** gray-white to brown, the edge is purple-brown hail, and there are obvious round lesions, when the lesions are seriously cracked Xiaofan are connected to each other to form large lesions, but the lesions are not easy to perforate.