Abstract
This examination was undertaken in order to develop new herbicides which may not cause enviromental pollution. The present paper describes the herbicidal characteristics of lauryl DL-valinate·HCl (AH-1) in paddy field and its combination with methoxyphenone (NK-049). The results obtained are summarized as follows:
(1) AH-1 did not inhibit the germination of millet, but inhibited the elongation of root and shoot in Petri dish.
(2) AH-1 showed herbicidal effect on barnyardgrass and broadleaf weeds at early post-emergence application of 100g/a.
(3) The herbicidal activity of AH-1 on barnyardgrass under flooded condition was much better at 3cm of water depths.
(4) The synergistic action of AH-1 and NK-049 was recognized for barnyardgrass. The application of their combination (mixing ratio 2:1) at 45g/a was very effective in controlling barnyardgrass and broadleaf weeds, and injury for transplanted rice plants was not observed.
