カラマツヤツバキクイムシに随伴する青変菌によるカラマツの萎凋(会員研究発表論文)

概要

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The pathogenicity of Ceratocystis piceae, isolated from the adults of Ips cembrae, was tested on Larix leptolepis. Inocula were placed in small holes (6mm in diameter) in the bark, 1cm or 3cm apart, in 2 rings encircling the stems in the middle of July, 1989. In late August, the xylem pressure potential of the trees with 1cm apart inocula was significantly lower than that of the control with sterile inocula. Most of the trees with 1cm apart inocula abruptly defoliated from late August to early October. The sapwood inside the inoculation became blue-stained, and C. piceae was re-isolated. Brownish necroses were produced in the phloem around the inocula in 3 weeks after the inoculation. The results indicate that C. piceae associated with I. cembrae is pathogenic to L. leptolepis.
北方森林学会の論文
1991-03-01