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Biological characteristics of the pathogenic fungus of brown spot of cockscomb

Liu Qili;Zhang Jianxin;Tian Xueliang;Lang Jianfeng;School of Resources &Environmental Science,Henan Institute of Science and Technology;College of Agronomy and Biotechnology,China Agricultural University;College of Life Sciences,Henan Normal University;  
Celosia cristatais a widely cultivated ornamental and medicinal flower.Brown spot of cockscomb is one of the main diseases of cockscomb.In this study,the pathogenic fungus of brown spot of cockscomb from northern Henan Province,Fusarium sulphureum,was identified and its biological characteristics were determined.The clones of the pathogens grew better on the oatmeal agar medium added with leaf juice,and the optimum temperature was 25℃.The rate of spore germination was highest at 20℃in acid environment.The rate of conidial germination in 5%sucrose solution was close to that in5%glucose solution,and both rates were higher than those in tap water and distilled water,and the lighting had no effect on conidial germination.
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