Water status of hinoki cypress, Chamaecyparis obtusa, attacked by secondary woodboring insects after typhoon strike |
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Authors: | Masafumi Ueda Ei’ichi Shibata |
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Institution: | (1) Nara Forest Research Institute, Takatori, Nara 635-0133, Japan;(2) Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan |
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Abstract: | We estimated the water status of six 31-year-old hinoki cypress (Chamaecyparis obtusa) trees that were struck by a large typhoon. Measurements were made of the trunk water-conduction area of xylem, leaf water potentials, and diurnal changes in trunk diameters. The secondary woodboring insects, Callidiellum rufipenne and Ovalisia vivata, on the trees were captured by the sticky-trap banding method. In trees on which these wood borers were captured, water conduction areas were reduced, leaf water potentials were lower, and trunk diameter changes (R ) fluctuated during the day, suggesting that the trees had been damaged by the typhoon and were under water stress. The secondary woodboring insects attacked the water-stressed trees. |
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Keywords: | Chamaecyparis obtusa Secondary woodboring insect Stem diameter change Water status |
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