Identification of the Pathogens Causing Root Rot of Alfalfa in Inner Mongolia

doi:10.7668/hbnxb.2008.06.024

Abstract

Abstract: To identify the major pathogen,317 alfalfa root rot isolates sampled from Huhhot,Inner Mongolia of China,were determined.The results showed that:root rot of alfalfa was caused by several pathogens,where predominant pathogen wasFusariumspp.Pathogenicity analysis indicated that F.solani had the strongest virulence with infected rate of 90 0%,whereas infected rate ofF.culmorumandF.oxysporumwas 81 7% and 61 7%,respect ively.When F.solani was co-inoculated with other isolated pathogens,the infected rate of the host were higher than individual infection ofF.culmorumandF.oxysporum.F.solaniwas the major pathogen of root rot of alfalfa,F.culmorumandF.oxysporumplayed an accessory role in alfalfa.

Key words: Medicago sativa, Root rot, F.solani, F.culmorum, F.Oxysporum

CLC Number:

S435.4

CAO Li-xia, ZHAO Cun-hu, BAI Quan-jiang, SHAO Zhi-zhuang. Identification of the Pathogens Causing Root Rot of Alfalfa in Inner Mongolia[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2008, 23(6): 105-107. doi: 10.7668/hbnxb.2008.06.024.

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