Title: Biological Characteristics and Pathogenicity of Different Isolates of Cytospora spp.Isolated from Apple Trees in Hebei Province
Abstract: To make clear the pathogen species and pathogenic differentiation of Cytospora spp.in apple trees,153 isolates of Cytospora spp.collected and isolated from eight different apple production areas of Hebei province were studied in this experiment.Twelve isolates were selected as representatives according to colony color,mycelia growth rate and mycelia density,to test the pathogenicity.The results indicated that there was significant difference in colony color,mycelia growth rate and mycelia density between different isolates.All isolates could be divided into 7 kinds according to the colony color,with pale yellow and yellow kinds most.70.59% of all isolates had medium growth rate,and the aerial hyphae of 57.52% was developed.The virulence of different colony color isolates was significantly different.Pale yellow and yellow-white colony isolates had stronger virulence when the colony growth rate was similar.The colony growth rate had positive effect on the virulence when the colony color was the same.There was no significant effect of the mycelia density on the virulence of different isolates.These results indicated that Cytospora spp.isolated from apple trees in Hebei had diversity and different virulence.
Publication Year: 2013
Publication Date: 2013-01-01
Language: en
Type: article
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