1. Department of Biological Production Science, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Fuchu, Tokyo, Japan
2. Department of Agrobiology and Bioresources, School of Agriculture, Utsunomiya University, Utsunomiya, Tochigi, Japan
3. Sano High School, Sano, Tochigi, Japan
4. Tochigi Shonan High School, Tochigi, Tochigi, Japan
5. Department of Crop Protection, Faculty of Agriculture, Gadjah Mada University, Yogyakarta, Indonesia