Title: Structural analysis of Fusarium species causing maize ear rot in Nanyang city
Abstract: Fusarium is the main causal agent of maize ear rot.The population structure of Fusarium species causing maize ear rot in 5 counties of Nanyang City was investigated.The pathogens were isolated from diseased corn samples using conventional tissue isolation method.The pathogenicity of the single spore derived isolates on corn leaves and ears was tested based on Koch's postulates.The pathogenic isolates were identified based on morphological characteristics and rDNA-ITS(internal transcribed spacer) sequences.Totally 105 Fusarium isolates were obtained from 80 maize ear rot samples collected from the investigation areas.The inoculation tests showed that all the Fusarium isolates obtained were virulent on corn leaves and ears.At least 4 fungal species were identified as causal agents of maize ear rot based on their morphological characteristics and rDNA-ITS sequences.They were Fusarium proliferatum,Gibberella monoliformis,F.equiseti and G.zeae.F.proliferatum and G.moniliformis were found to be the predominant and subdominant species,respectively,among the Fusarium spp.and Gibberella spp.associated with maize ear rot in Nanyang City.
Publication Year: 2012
Publication Date: 2012-01-01
Language: en
Type: article
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