Isolation,Identification and Biological Characteristics of Dominant Fungi Causing Mildew of Deyang Cigar Tobacco Leaves
Li Shuhong
Li Jiayi
Zhang Chengbei
Zeng Yang
Tan Shu
Chen Liping
Li Zheng
Zhao Guorui
Du Jiao
Zhang Songtao
Abstract：In order to explore species and biological characteristics of dominant fungi causing mildew of cigar tobacco leaves in Deyang,Sichuan,four dominant fungi were isolated and purified from deeply fermented leaves of Chuanxue 4 cigar tobacco.According to the observation of colony morphology and spore structure and the molecular biological analysis,they were classified as Scopulariopsis brevicaulis,Aspergillus sydowii,Ta-laromyces funiculosus and Aspergillus cristatus.The study on biological characteristics of these fungi showed that S.brevicaulis grew the fastest on 1%tobacco juice medium,A.sydowii and A.cristatus grew the fastest on Salt Czapek Dox Agar,and T.funiculosus grew the fastest on Czapek Dox Agar.S.brevicaulis,A.sydowii and T.funiculosus could grow at 25～40℃,but couldn't grow at 45℃,and A.cristatus couldn't grow at 40℃or a-bove.The four strains of fungi could all grow in the environment with pH value at 5 to 10,and the optimum pH value was 10 for S.brevicaulis,9 for A.cristatus,and 5 for A.sydowii and T.funiculosus.The research re-sults were of great significance for the study of mildew prevention and control.
Keywords：Cigar tobacco leavesFungi causing mildewIsolation and identificationBiological charac-teristics
Publication Date：2026-01-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：7( 143-149 )