Institution: | 1. Weed Control Research Institute, Faculty of Agriculture, Utsunomiya University, 350 Mine-machi, Utsunomiya 321, Japan;2. Institute of Physical and Chemical Research, 2-1 Hirosawa, Wako, Saitama 351–01, Japan;3. Department of Forestry, The Australian National University, P.O. Box 4, Canberra, ACT 2601, Australia |