Water status of hinoki cypress, Chamaecyparis obtusa, attacked by secondary woodboring insects after typhoon strike

• Published in: Journal of forest research Vol. 10; no. 3; pp. 243 - 246
• Main Authors: Ueda, Masafumi, Shibata, Ei’ichi
• Format: Journal Article
• Language: English
• Published: Tokyo Springer-Verlag 01.06.2005; Taylor & Francis; Taylor & Francis Ltd
• Subjects: boring insects; Callidiellum rufipenne; Chamaecyparis obtusa; Cupressus; diurnal variation; Insects; leaf water potential; Leaves; Secondary woodboring insect; Stem diameter change; trees; Typhoons; Water potential; Water status; Water stress; xylem
• ISSN: 1341-6979; 1610-7403
• DOI: 10.1007/s10310-004-0139-2

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 (Rε) 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.