1. Symptoms: the disease is caused by the infection of seminiflora. At the beginning of the disease, the leaves appeared small brown spots, irregular or nearly round. If not treated in time, the lesions will gradually expand, causing the leaves to wither and die.
2. Prevention and control method: once the disease is found, the infected leaves shall be removed in time and burned intensively. At the same time, it is necessary to spray chlorothalonil on the leaves for treatment immediately, once every 7-8 days. Continuous spraying 2-3 times can basically recover.
1. Symptoms: the disease is caused by rust parasitism in fungi. It mainly damages leaves and stems, and generally only causes local infection. The damaged parts will produce small dots of different colors, such as fallen leaves, burnt shoots and poor growth. In severe cases, the spores of the pathogen are densely packed, and the plants die rapidly due to the evaporation of a large amount of water in the body.
2. Control method: 70% mancozeb and 75% chlorothalonil can be used to spray the diseased plants to prevent rust.
1. Symptom: red spider is also called mite. It damages the leaves of Mimosa by adults, nymphs and larvae. It first damages both sides of the main vein on the back of the leaf, and gradually spreads over the whole leaf from several small groups. When the amount of occurrence is large, the leaves of the whole tree often turn yellow and white.
2. Control method: once found, it can be treated by spraying Omethoate or dicofol 800-1000 times.
