Comparison of pathogenicity of Valsa mali strains showing different culturing phenotypes
The pathogenicity of three strains (F-SD-8,F-BJ-2c-2 and F-HN-2a-1) of Valsa mali var.pyri causing pear canker and one strain (F-SX-A6) of V.mali var.mali causing apple canker in China were comparatively tested by wound inoculation on in vitro twigs of pear,apple and some other woody plants,and in vivo twigs of pear.Significant pathogenicity differentiation was detected in V.mali var.pyri.Generally strains F-SD-8 and F-BJ-2c-2 were highly pathogenic on pear although their culturing characteristics differed greatly.The strain F-SX-A6 was more aggressive on apple than on pear,and the strain F-HN-2a-1 showed significant lower pathogenicity on ten pear cultivars and other seven species of woody plants.Our results confirmed that two variants of V.mali had host preference and were also aggressive to crabapple,apricot,and peach besides apple and pear.Meanwhile,strains F-SD-8 and F-BJ-2c-2 could induce the formation of pycnidia on in vivo twigs of pear,which was not observed on in vivo twigs inoculated with F-HN-2a-1 and F-SX-A6.
Valsa canker of pearValsa canker of applepathogenicity
周玉霞、张美鑫、翟立峰、杨晓平、曹素芳、洪霓、王国平
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华中农业大学植物科学技术学院,武汉430070
湖北省农科院果树茶叶研究所,武汉430209
甘肃省农科院林果花卉研究所,兰州730070
华中农业大学农业微生物学国家重点实验室,武汉430070
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Valsa canker of pear Valsa canker of apple pathogenicity
NETL
NSTL
万方数据
维普
