Sugarcane yellow spot The symptoms are also known as yellow cane disease and red spot disease. It is the leaf disease that causes heavy sugarcane damage. Distributed in South China, Central China and Southwestern Cane Area. The young sugarcane leaf lesions are irregularly round or oval in shape and size, and the edges are not neat. The lesions at the tip of the lesion are mostly scattered, yellow, and the lesions merge with each other when the disease condition expands, and the lesions become red. , Sometimes yellow, erythema coexist, the surface of mature lesions often have gray hairy objects, especially on the back, that is, the conidial stems and conidia and hyphae of the bacteria. The pathogen Mycovel10siella koepkei (kruger) Deighton called the spore fungus Strains, a fungus belonging to the subphylum Fungi. Hyphae with septa, few branches, colorless or light brown. Conidiophore stems extend from the stomata, 6 to 20 clusters, brown, with 1 to 12 diaphragms, mostly 3 to 6 diaphragms. Conidia were born at the top of conidial stalks, solitary, fusiform, sometimes slightly curved, colorless, size 20-753.5-5 (μm). The growth temperature limit of the bacteria is 13 to 34°C. Transmission Pathway and Pathogenic Conditions The pathogens use mycelium to overwinter in diseased leaf tissue. When the conditions are appropriate, the conidia generated on the lesions spread by air currents and wind and rain and fall to the leaves. The spores germinate under dew or rain conditions. , Produce the germ tube to invade from the stomata or penetrate the epidermis directly, form the disease spot through the latent. A large number of conidia were produced in the diseased department and repeated infections were repeated several times. With high temperatures and humid conditions, the temperature in the Pearl River Delta of Guangdong is high from July to September, and rainfall is often more likely to occur. The onset and severity of the disease each year are related to typhoon and heavy rain. The typhoon scrapes early and has an early onset. The storm is frequent and the disease is heavy. Conversely, the onset is late and light. In addition, the re-application of partial nitrogen fertilizer, dense growth, poor ventilation and light transmission, high groundwater level and heavy onset. The differences between the varieties were obvious: C0419, Taisu 134, and Yuesu 57/423 were affected. Control methods (1) Selection of disease-resistant varieties such as Taiwan Sugar 172, Yacheng 62/70, Yacheng 71/374, Guitang 57/624, Xintai Sugar No. 1, South China 56/12, Guitang 73/167, Yacheng 64/ 389, Yacheng 71/370 and so on. (2) Set up a drainage system for cane fields to eliminate water in time and effectively regulate the humidity in the sugarcane field. (3) Strengthen management. The diseased leaves and old leaves were stripped in time in high temperature and rainy season, and burned in a centralized manner to reduce the initial infection source. The use of sugar cane formula fertilization technology, pay attention to reasonable application of nitrogen, phosphorus and potassium, to prevent partial application, over-application of nitrogen fertilizer, the ward in the rainy season before the appropriate increase in potassium fertilizer, improve disease resistance. (4) After discovering the central diseased plants, spray 50% Benomyl WP 1200-fold or 1:2:100-fold Bole Poly Liquid, 12% Green Milk Emulsion 600 times, spray every 7 days. Times, a total of 3 to 4 times. Laboratory Ppe,Lab Gown Ppe,Ppe Lab Gown,Lab Isolation Gowns Taizhou huangyan Yiman industry & trade limited , https://www.yimancoverall.com