Isolation and Identification of Pathogen of Root-rot Disease Processing Tomato in Xinjiang

In 2005 and 2006,studying the Pathogen Isolation and Identification of processing tomatoes root-rot disease in Xinjiang,the results showed that the disease was caused by complex pathogenic fungi such as Pythium,fusarium,Rhizocton and Phytophthora.Pathogenicity indicated Pythium aphanidermatum had a higher virulence than others in seedling stage,which caused serious damage and belonged to preponderant fungus;Next was Rhizoctonia solani.But in the middle-later period of growth,Fusarium oxysporum and Fusarium solani's isolation frequency were the highest,they separately caused wilt and root-rot at the processing tomato.At present,although the wilt disease still happened at initial stage,it propagated in many ways and the harm was serious,to which greater attention should be devoted.