Lotus brown spot Symptoms: This disease is also known as brown spot disease. Leaf spot round or nearly round, ranging in size, light brown, dark brown to purple-brown edges, and some are now concentric ring lines, spots dense black spots, when the lesions are dense and commissure of plaque, disease The block is partially dry. Pathogen: CercosporanymplaeaceaCke.etEll. = C.enoticaEll.etEV. C. nelumbonisTharp called Cercospora zeaeiana is a fungus of the subphylum Fungi. Conidiophores scattered or clustered, unbranched, pale olive brown, 10-502.5--4 micron in size; conidiophores long-reflexed club-shaped to linear, colorless to pale, straight or curved, with as many as 10 membranes More than one, thin wall, obvious umbilical marks at the base, size 25 ~ 1252 ~ 3.5 microns. Transmission route and disease conditions: The pathogens overwinter on the diseased body with mycelium and conidiophores, and were initially infested and reinfested with conidia, and spread by airflow or wind and rain. High-temperature and heavy rain, especially in years or seasons during which the storm is frequent, are liable to occur; plots where the continuous cropping site or the lotus plant has poor permeability are severely affected. Control methods (1) Pay attention to the health of the field, collect the disease or bury it at the time of harvest or during the growing season. (2) Carry out the crop rotation seriously. (3) Closely plant and manage water and fertilizer. (4) Combine the prevention and cure of spoilage disease and timely cure the disease. Plastic Encapsulated Utility Knife Plastic Encapsulated Utility Knife,Plastic Safety Utility Cutter Knife,Auto Lock Retractable Utility Cutter Knife,Auto Retractable Utility Knife Shangqiu City Huashang Zhiyuan Tools Co., Ltd. , https://www.hszytools.com