Today, Xiaobian introduces the symptoms of the early stages of the disease that are most likely to breed in summer. Everyone carefully examines their flowers. If it is early, there is room for relaxation.
Anthrax: The pathogen is mainly caused by infestation of the tip and leaf margin. Also visible on green branches. At the beginning of the disease, there are light brown near-round spots on the leaf surface, which have many small black spots on the leaves. The leaves are purple-brown or dark brown, and then gradually become grayish white. After the rain, the lesions can produce pink pus. In severe cases, the leaves are scorched and can cause the plants to die. These bacteria are susceptible to flower infection and prevalence under the conditions of temperature 22-25 degrees, relative humidity above 95%, and weak plant growth, usually in the Meiyu season. Mainly harm cactus, hydrangea, Milan cyclamen, orchid, chrysanthemum, smile, tea and other flowers.
Rust: The pathogen mainly harms leaves, stems and buds. The disease occurs in the spring, and spreads in early summer. The plant appears yellow-brown powder in the lesion, which is like rust powder, which makes the branches turn from green to yellow. In severe cases, the whole plant leaves will die, or the flower buds will dry up. Such germs often invade the flowers and carnations of the genus Tibetan genus, and it is easy to repeatedly infect the flowers.
The above measures can be used to prevent and cure:
1 Strengthen maintenance management. Control air humidity, pay attention to ventilation and ventilation, cool down in summer, and improve the disease resistance of plants.
2 Rational fertilization and irrigation. Avoid excessive application of nitrogen fertilizer during fertilization to avoid excessive moisture and sewage splashing on the foliage.
3 Do a good job in sanitation and remove the source of the disease. Thoroughly remove litter in winter and spring; cut off the diseased part and destroy it after the onset.