In the experiments of individual weed, water
hyacinth showed to have a strong ability to produce
branches. The control, water hyacinth without treat-
ment, produced more than six branches. Treatments 1
to 6 (T1~T6) inhibited the reproduction of water
hyacinth at various levels, and KWH02 could provide
the highest inhibition (70%) on individual branching
compared to the control (Fig.1).