杉木顶枯病的发生及病原菌生物学特性的研究

来源 :福建林学院学报 | 被引量 : 0次 | 上传用户:pgwork2011
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杉木顶枯病自1977年在福建上杭发现以来,相继发生于其它杉木产区。该病危害当年生的顶梢,初在顶梢下约30厘米处发黄,随后向上蔓延,梢部变棕褐色,梢顶枯死,针叶由赤棕色变为灰白色,不脱落。梢部枯死部分约60—90厘米,个别达1米以上。杉木得病后,高生长受到严重抑制。 The top seedling of Cunninghamia lanceolata has been found in other fir producing areas since its discovery in Shanghang, Fujian in 1977. The disease endanger the top of the year, beginning at about 30 cm under the top of the yellow, and then spread upward, the tip turned brown, tip top dead, the conifer from reddish brown to gray, do not fall off. The dead part of the tip of about 60-90 cm, individually up to 1 meter above. After the disease of Chinese fir, the high growth is severely inhibited.
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