1. Brown spot: this disease will damage the leaves, and many dark brown spots will appear, seriously affecting the growth. At the beginning of the disease, thiophanate methyl was sprayed 2-3 times continuously to eradicate it. Prevention, careful maintenance and rational fertilization can improve the disease resistance of plants. At the end of autumn, the diseased leaves were removed and burned.
2. Leaf spot disease: this disease is also harmful to the leaves, causing the leaves to gradually yellow and wither, falling off and affecting the ornamental. After the onset of the disease, the diseased leaves should be removed in time and the zincic solution should be sprayed.
3. Coal pollution: it is mainly harmful to the leaves and flowers, causing the leaves and flowers covered with black coal powder layer. Prevention is the main method, and Omethoate is sprayed to control aphids.
1. Scarab beetle: this pest is harmful to hibiscus. It will bite on buds, leaves and flowers. After the occurrence of artificial capture, spray Omethoate when the harm is full.
2. Starscream: Starscream will gather in large numbers, climb on the back of the leaves, suck the juice inside and cause the leaves to lack of water and dry up. The diseased leaves were removed and sprayed with dicofol or Omethoate solution.
