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Variations in Disease Resistance of Chestnut Cultivars against Chestnut Blight Fungus,Cryphonectria parasitica

Variations in Disease Resistance of Chestnut Cultivars against Chestnut Blight Fungus,Cryphonectria parasitica
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摘要 Chestnut blight caused by Cryphonectria parasitica is one of the major chestnut diseases occurred on stems and branches. Oriental chestnut has more resistance than American one. Twenty-five cultivars of chestnut treeincluding various cultivars such as Tsukuba, Okkwang, Rihei, Ginyose, Eunsan, etc. were tested with a rapid, simple and reliable method. The cultivar Banseki is one of the most resistant cultivars tested and has the necrotic area of 0.40 cm2. However, the necrotic areas of the cultivars of American chestnut, Eunsan, Kwangjujoyul and Eaton, ranges from 3.35 to 2.61 cm2 and these cultivars are relatively susceptible to this pathogen. Many pycnidia of this pathogen were observed on the inner and outer bark tissues after incubating for 3 weeks. Chestnut blight caused by Cryphonectria parasitica is one of the major chestnut diseases occurred on stems and branches. Oriental chestnut has more resistance than American one. Twenty-five cultivars of chestnut tree including various cultivars such as Tsukuba, Okkwang, Rihei, Ginyose, Eunsan, etc. were tested with a rapid, simple and reliable method. The cultivar Banseki is one of the most resistant cultivars tested and has the necrotic area of 0.40 cm^2. However, the necrotic areas of the cultivars of American chestnut, Eunsan, Kwangjujoyul and Eaton, ranges from 3.35 to 2.61 cm^2 and these cultivars are relatively susceptible to this pathogen. Many pycnidia of this pathogen were observed on the inner and outer bark tissues after incubating for 3 weeks.
出处 《Chinese Forestry Science and Technology》 2006年第2期75-77,共3页 中国林业科技(英文版)
关键词 Cryphonectria parasitica chestnut blight resistance SUSCEPTIBILITY 板栗 枯萎病 抗性 磁化系数
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