1. United Graduate School of Agriculture Sciences; Kagoshima University; Kagoshima Japan
2. Subtropical Field Science Center, Faculty of Agriculture; University of the Ryukyus; Nishihara Japan
3. Special Course in International and Resource Sciences, Faculty of Agriculture; Kagoshima University; Kagoshima Japan
4. Department of Plant, Soil and Insect Sciences; University of Massachusetts; Amherst Massachusetts USA