| Abstract: | A historical review on rice herbicides in Japan was conducted. Rice cropping patterns (transplantation and flooded or dry‐direct seedings) are described, followed by a comparison of the economics of hand weeding and herbicide use. Changes of herbicide chemicals, formulations and application methods are also described. Weeds resistant even to herbicides designed for use with rice agriculture were found. Mode of action and selectivity mechanism of these herbicides are discussed from the standpoint of fish toxicity, which is especially important in rice culture. Finally, a view for the future is presented. |
