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首页> 外文期刊>Journal of Arboriculture >Comparative test of six DED-tolerant elms: a preliminary report on nursery performance.
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Comparative test of six DED-tolerant elms: a preliminary report on nursery performance.

机译:六种耐DED的榆树的比较测试:苗圃性能的初步报告。

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摘要

Several long-term comparison plots of American elm (Ulmus americana) clones that have shown Dutch elm disease (DED) tolerance, which was caused by Ophiostoma ulmi, were established in some parts of USA (New Jersey, Pennsylvania, Ohio and other sites). Results showed that the average height of the six clones was: 'Jefferson'- 45 to 65 cm, 'New Harmony'- 60 to 90 cm, 'Patriot', 'Princeton' and 'Prospector'- 90 cm, and 'Valley Forge'- 60 cm. All clones were fast growing and dormant, although mature elms were flowering in New Jersey and Pennsylvania. 'Princeton', the control clone, required the least trimming and staking and believed that its moderate DED tolerance together with good sanitation will keep it disease free.
机译:在美国的某些地区(新泽西州,宾夕法尼亚州,俄亥俄州和其他地区)建立了几个长期比较图,这些图谱显示了由榆皮鱼引起的荷兰榆病(DED)耐受性的美洲榆(Ulmus americana)克隆。 。结果表明,这六个克隆的平均高度为:“杰斐逊”-45至65厘米,“新和谐”-60至90厘米,“爱国者”,“普林斯顿”和“探矿者”-90厘米和“谷锻造” '-60厘米。尽管成熟的榆树在新泽西州和宾夕法尼亚州开花,但所有克隆均生长迅速且处于休眠状态。对照克隆“ Princeton”所需的修剪和花样最少,并认为其适度的DED耐受性以及良好的卫生条件使其无病。

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