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Resinous stem canker development during the growing season of Chamaecyparis obtusa (Hinoki cypress) inoculated with pathogenic fungus Cistella japonica

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Seasonal development of resinous stem canker was determined in Chamaecyparis obtusa trees wound-inoculated with Cistella japonica in January 1996. Samples for anatomical analysis were harvested on 20 May, 9 July and 6 August in the second year of inoculation, and the sections were observed under light microscope. Resin exudation was most abundant in the second year, decreasing in the third. All new resin exudation in the second year was recognized at the May observation. New traumatic resin canal formation was observed in the August samples, and an expansion of necrotic lesions was observed mainly in summer samples in the inoculated trees and in naturally affected trees. Cistella japonica was re-isolated from all bark lesions or inoculated wounds examined. These results suggest that the activity of Ci. japonica in the tree affects the seasonal development of resinous stem canker during the growing season of the trees.
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Document Type: Research Article

Affiliations: 1: Experimental Station at Tanashi, The University Forests, The University of Tokyo, Midori-cho 1-1-8, Nishitokyo, Tokyo 188-0002, Japan. ;, Email: [email protected] 2: Forestry and Forest Products Research Institute (FFPRI), Tsukuba Norin Kenkyu danchi-nai, PO Box 16, Ibaraki 305-8687, Japan; 3: Kansai Research Center, FFPRI, Fushimi, Kyoto 612-0855, Japan

Publication date: 2003-06-01

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