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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Sphaeropsis blight ： ウィキペディア英語版 Sphaeropsis blight Sphaeropsis blight is a disease that affects pines worldwide. This disease was previously known as Diplodia tip blight. Sphaeropsis blight is considered to be a "disfiguring disease" that attacks pine trees that are growing under stressful conditions. Sphaeropsis blight does not typically kill the tree, but will significantly disfigure the tree if not properly cared for or controlled. Most commonly, Sphaeropsis blight attacks Austrian (''Pinus nigra''), Scotch (''P. sylvestris''), and red (''P. resinosa'') pine trees. This disease is a problem in the United States, nationwide, from coast to coast, and can be found worldwide. == Description== Sphaeropsis blight is caused by the fungus ''Diplodia pinea'' (=''Sphaeropsis sapinea'') and is known to infect the younger and healthy needles of newly formed candles. The trees that are most greatly affected by this disease are typically over 30 years of age, and rarely does it occur in the younger trees. The reason for this disease attacking older trees is due to the diseases growth from old, dying or dead seed cones. Younger trees can become infected if located near older, infected trees. This disease is known to attack the tips and needles of trees that have been weakened by stress from drought, injuries to roots, not enough nutrients in the soil, excessive amounts of shade, as well as injuries inflicted from weather (high winds, hail, etc.) and insects. This disease causes what is known as “tip blight,” which resembles cankers that appear on the stems and branches of pine trees and can cause death, most typically in the lower branches of these trees. The cankers secrete a resin that can cause dead infected needles to stick to other parts of the tree after the dead needles have fallen. This may contribute to further infection of the tree. The most evident sign of a pine tree being infected with Sphaeropsis blight is if the tree(s) have “brown, stunted new shoots with short, brown needles”.〔(Sphaeropsis (Diplodia) blight )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Sphaeropsis blight」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.