Affiliation: | (1) National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba Ibaraki, 305-0053, Japan;(2) Forestry and Forest Products Research Institute, 1 Matsunosato, Kukizaki Ibaraki, 305-8687, Japan;(3) Department of Bee Pollination, Bumblebee Section, API Company Ltd., Honjo Factory, 8-38 Nakano, Honjo Gifu, 500-8634, Japan |