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Abstract
Since the early 1980s, an epidemic forest disease, Japanese Oak Wilt (JOW), has been spreading from coastal areas along the Sea of Japan to the interior of Honshu island and has been devastating huge areas of forests by killing an enormous number of oak trees in urban fringe mountains, gardens, and parks. The disease is caused by a fungus,
Raffaelea quercivora, and is spread by the vector beetle,
Platypus quercivorus (Coleoptera: Platypodidae). On the thorax of female
P. quercivorus, are several holes, so called mycangia, where several species of yeasts are kept as the beetles’ food. Together with such yeasts, the pathogenic fungus
R. quercivora exists in the mycangia and is thereby transferred to the next tree. The spreading pattern of this disease is, therefore, determined by the searching and host preference behavior of the vector beetle. To control epidemic spreading of JOW, it is essential to understand the spread dynamics of JOW in infected trees. The object of this study was to analyze the spread dynamics of JOW in infected trees in relation to the host selection behavior of vector beetles in a stand.
Parent Publication
Citation
Futai, Kazuyoshi; Kiku, Hiroaki; Qi, Hong-ye; Tarn, Hagus; Takeuchi, Yuko; Yamasaki, Michimasa. 2012. Host preference of the vector beetle, host resistance, and expanding patterns of Japanese oak wilt in a stand. In: Sniezko, Richard A.; Yanchuk, Alvin D.; Kliejunas, John T.; Palmieri, Katharine M.; Alexander, Janice M.; Frankel, Susan J., tech. coords. 2012. Proceedings of the fourth international workshop on the genetics of host-parasite interactions in forestry: Disease and insect resistance in forest trees. Gen. Tech. Rep. PSW-GTR-240. Albany, CA: Pacific Southwest Research Station, Forest Service, U.S. Department of Agriculture. pp. 126-130.
