Osmanthus, also known as osmanthus, is a precious aromatic plant of our country's specialties. Xianning is located in South China and is known as the “hometown of sweet-scented osmanthus flowersâ€. In recent years, the damage caused by diseases and insect pests of sweet-scented osmanthus has increased, resulting in a decline in ornamental value. Common are: anthracnose, leaf spot, rot, giardia, hibiscus, powder The pest control, scale insects, moths, leaf roller moths, codling moths, and ulnar diameters are combined with prevention and control practices in recent years. The occurrence characteristics and prevention and control experience are summarized as follows. (1) Craniosis is prone to occur under high temperature and humidity conditions. Near-round purple-brown lesions are formed on the leaf stems, and black spots are formed on the stems. From June to July, sprayed Sensen Zinc 500-600 times liquid to prevent; pay attention to ventilation and light, reasonable watering and fertilization. The diseased leaves were found to be promptly removed and destroyed, and sprayed with 50% doxamine 800-1000 times to control. Or clear the field litter and weeds in winter. (2) Leaf spot disease is prone to occur under high temperature and humid environment conditions. Irregular black spots occur on the leaf surface, and black mold occurs on the leaves, causing the leaves to fall early. From the start of June to July, spray 140 times equal amount of Bordeaux fluid for prevention. Spray 70% thiophanate 800-1000 times after onset; Reasonable watering and fertilization; Pay attention to ventilation and light transmission; Remove litter and concentrated burn, reduce the source of infection . (3) The rot disease mostly occurs in the root and neck, and the damaged part is immersed in water. After the lesion gradually expands, it causes the plant to grow weak and even die. There is no serious summer rainy season. A small amount of sulfur powder was sprayed around the plants in early spring; the severely affected area was coated with Formamide arsenic kerosene.
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