Wataru Kojima,^1,*,** Shinji Sugiura,^2,*** Hiroshi Makihara,² Yukio Ishikawa,¹ Takuma Takanashi<sup>2

1</sup>1Graduate School of Agricultural and Life Sciences, The University of Tokyo, Bunkyo-ku, Tokyo 113-86
²2Department of Forest Entomology, Forestry and Forest Products Research Institute, Tsukuba, Ibaraki

^* Corresponding author. Tel. :+81-3-5454-6794; Fax : +81-3-5454-6998; E-mail: koj.wataru@gmail.com
^** Current address: Graduate School of Arts and Sciences, The University of Tokyo, Meguro-ku, Tokyo 153-8902, Japan
^*** Current address: Graduate School of Agricultural Science, Kobe University, Rokkodai, Nada, Kobe 657-8501, Japan