1. Symptoms: the disease usually occurs at the tip or edge of the bamboo leaf. At the beginning of the disease, the leaves will produce brown spots, and then gradually expand. The edge of the lesion is dark brown and radial. There is a wide red halo around the lesion. At the later stage of the disease, the disease department will produce gray green to dark green coal dirt lumps.
2. Control methods: remove the diseased leaves in time and bury them or burn them intensively. In the season of frequent diseases, the plants need to be sprayed with metformin, mancozeb or new fungicides for control. Spray once every 10-15 days, 2-3 times continuously.
1. Symptoms: the disease is mainly harmful to the leaves of nantianzhu. At the beginning of the disease, there are small brown spots on the leaves. Later, they will gradually expand into oval or irregular spots. There are dark brown bands on the edge of the disease spot, and there will be a lot of dense small black spots on the disease spot. The diseased leaves will gradually dry up, and in serious cases, the whole plant will die.
2. Control method: remove and destroy the diseased leaves in time. When the disease occurs, the plant should be sprayed with tobuzin or Bordeaux solution for treatment. Spray once every 10-15 days, three times in a row can cure.
