beemnet mengesha kassahun ethiopian institute of agricultural research, wondo genet agricultural research center. p.o.box 198, shashemene, ethiopia manaye balcha ethiopian petroleum enterprise zewdinesh damtew ethiopian institute of agricultural research, wondo genet agricultural research center. p.o.box 198, shashemene, ethiopia daniel bisrat addis ababa university, school of pharmacy gelila asaminew ethiopian institute of agricultural research, agricultural and nutritional research laboratories, ethiopia. seferu tadese ethiopian institute of agricultural research, wondo genet agricultural research center. p.o.box 198, shashemene, ethiopia muluken philipos

K H Hsu G L Powell