...The most widely used type of Japanese cedar is a type with twisted branches and no needles, propagated by cuttings. Junipers are intermediate hosts of the red spot fungus, a serious disease of pears and apples, so it is best not to plant them within at least 1 km of the area where they are cultivated. The red cedar, S. virginiana Ait., which is considered the best material for pencils, is a tall tree native to eastern North America that can reach 30 meters in height, but its production has declined significantly today. ... *Some of the terminology that refers to "red spot fungus" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…もっとも広く利用されているカイヅカイブキは枝がねじれ針状葉のない一型で,さし木で増やす。ビャクシン類はナシやリンゴの重要病害である赤星病菌の中間宿主となるので,その栽培地の少なくとも1km以内には植えない方がよい。鉛筆材としては最上のものとされるエンピツビャクシンS.virginiana Ait.(英名はred cedar)は北アメリカ東部原産の30mに達する高木であるが,今日では産出量が著しく減少した。… ※「赤星病菌」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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