1. Okinawa Prefectural Plant Protection Center; Naha Japan
2. Ryukyu Sankei Co., Ltd; Naha Japan
3. Faculty of Agriculture; University of the Ryukyus; Nishihara Japan
4. Department of Agro-environmental Science; Obihiro University of Agriculture and Veterinary Medicine; Obihiro Japan
5. Faculty of Agriculture and Marine Science; Kochi University; Kochi Japan