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Analyzing Vegetation Index Change of Damaged Trees by Pine Wilt Disease Using Portable Near Infrared Camera  

Kim, You Seung (Sundosoft Inc.)
Jung, Sung Eun (Division of Environmental Science and Ecological Engineering, Korea University)
Lee, Woo Kyun (Division of Environmental Science and Ecological Engineering, Korea University)
Kim, Jun Beom (Korea Forest Research Institute)
Kwon, Tae Hyeong (SEDAS MEDIA Co. Ltd)
Publication Information
Journal of Korean Society of Forest Science / v.97, no.6, 2008 , pp. 561-564 More about this Journal
Abstract
Pinus densiflora(red pine) stands in Korea have been faced with the serious threat by pine wilt disease caused by Bursaphelenchus xylophilus (nematodes). It is not easy to early detect and prevent the infected trees because those cannot be visually identified during the initial phase of infection. Red pine is usually infected by B. xylophilus from May to July and can be just visually detected in October or November. While the infected trees are wilted, the spectral value of Near Infrared (NIR) is supposed to be decreased. Based on this phenomena, in this paper, the vegetation vitality change of infected trees was analyzed using vegetation indices. Spectral values of Red, Green and NIR had been acquired monthly by a portable NIR camera in the same place of red pine stands infected by pine wilt disease. It could be proven that the vegetation index, or vegetation vitality of damaged trees starts to decrease from June, in the early infecting phase.
Keywords
pine wilt disease; Bursaphelenchus xylophilus; portable NIR camera; vegetation index;
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Times Cited By KSCI : 2  (Citation Analysis)
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