Herbicidal Activity of 3, 3′-Dimethyl-4-methoxybenzophenone (NK-049) in Paddy Field:2. Responses of Rice Plant to NK-049

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Effects of NK-049 on rice are discribed in this report.NK-049 showed a high selectivity between rice and barnyardgrass by pre-emergence treatment. Chlorophyll contents in rice plant were lowered for 7 to 10 days after treatment, but were granually recovered up to the normal level and no effect on growth was resulted. In case of barnyardgrass, persistent low level of chlorophyll contents, remarkable growth inhibition, and final death were observed.The photosynthesis in rice plant was reduced for a few days after treatment with NK-049 under flooded condition, but recovered up to the normal level and no effect on growth was obtained.There was little injury owing to the absorption of NK-049 through root of rice.Therefore, NK-049 was very safety to rice in pre-transplanting treatment.
日本雑草学会の論文