Honeysuckle scientific name Lonicera japonica Thunb. Alias ​​Hill Silver Flower. A perennial rattan shrub of the family Caprifoliaceae. Use buds or open flowers as medicine. Leaves and branches can also be used as medicine. With heat detoxification effect. In the 60s, it began to change from wild to domestic species. Now from the north to the south, many cities and counties have planted them, once they have a large area. Symptoms mainly affect the leaves, and sometimes they also harm stems and flowers. The lesions on the leaves were white dots at the beginning and expanded to white powder spots. The whole leaves were covered with white powder during the late period. In severe cases, the leaves were yellow and even deciduous; the lesions were spotted brown and irregularly shaped with white powder on the stems. The flowers are twisted and fall off when severe. Pathogen Microsphaera lonicerae (Dc.) Wint. In Rabenh. The honeysuckle silkworm shell is a fungus belonging to the genus Ascomycota. Ascospores scattered, spherical, dark brown, size 65-100μm; 5-15 appendages, 55-140μm long, 0.7-2.1 times the diameter of the ascospores, colorless, without septate or 1-septum, 3 - 5 double bifurcations. Ascospora 3-7, oval to elliptic, size 34-5829-49 (μm). Ascospores 2-5, oval, size 16.3-258.8-16.3 (μm). The asexual state is Oidium sp. Mycelia, leaves on both sides of the surface, conidiophore erect, size 50-947-10 (μm); conidia 2-3 bunches, a few solitary, oval, cylindrical, to the base type, Size 28 - 4912 - 20 (μm). Transmission Pathway and Pathogenic Conditions The pathogenic bacteria ascend on the diseased body overwintering, ascaria capsules release the ascospores in the first year of infestation, and the diseased part also produces conidia for reinfection. Warm and dry or shaded between the plants susceptible to disease. Excessive application of nitrogen fertilizer, alternating wet and dry disease. Control methods (1) Select disease-resistant varieties, pay attention to pruning, increase ventilation and light transmission. (2) Spraying 50% colloidal sulphur 100 g water 20 kg or 15% triadimefon WP 2000 times in the initial stage of disease. Spice Novelties Co.,Limited , https://www.wholesale-adult-toys.cn