Survation Of Fungal Diseases And Discovery Of New Diseases In Vegetables

In China, vegetables have become an important source of national income because of its large cultivated area and more cultivars. But vegetable diseases are one of the most important factors restricting vegetable production. In this paper, vegetable diseases in main vegetable cultivation area are studied. Vegetable diseases including 6 new ones on 90 important vegetables collected from main vegetable cultrivation areas are recorded and described, of which, 2 pathogens are new species, and 4 are new record hosts.1. Two new species, Stemphylium spinaciae B.J. Li, Y.F. Zhou & Y.L. Guo and Stemphylium basellae B.J. Li,Y.F. Zhou & Y.L. Guo are described and illustrated. And 4 new record hosts, Ipomoea aquatica Forsskal. (Corynespora merremiae Guo); Benincasa hispida (Thunb.) Cogn. var. chieh-qua How. (Ascochyta cucumeris Fautrey et Roumeguère); Lycopersicon esculentum Miller (Colletotrichum coccode Hughes); Solanum melongena L. (Pseudocercospora solani-melongenicola Goh & Hsieh) are recorded.2. During the investigation, 70 species of 30 genus of pathogen on 90 important vegetables collected from Liaoning, Inner Mongolia, Hebei, Beijing, Shandong, Shanxi, Henan, Gansu, Xinjiang, Hubei, Zhejiang, Jiangxi, Hunan, Chongqing, Sichuan, Yunnan, Guizhou, Guangxi, Hainan Province are identified.3. Some new type diseases such as leaf spots caused by Corynespora, Stemphylium, Pseudocercospora occurred seriously in recent years. In addition, diseases caused by Ascochyta, Colletotrichum, Cercospora, Alternaria, Phyllosticta, Septoria still are serious diseases.In this study, pathogenic types of vegetable diseases and the degree of infection in main vegetable cultivated area are cleared. Correct identification of pathogens can provide theoretical and scientific basis for diagnosis and control of the vegetable diseases, nd therefore is of important practical value.