Herbicidal activity of N-((R)-2,3-epoxypropyl)-N-((R)-.ALPHA.-methylbenzyl(-2,4,6-trimethylbenzenesulfonamide, UY-510.

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Herbicidal activity and behavior of UY-510, N-[(R)-2, 3-epoxypropyl]-N-[(R)-α-methylbenzyl]-2, 4, 6-trimethylbenzenesulfonamide, were examined. The substance strongly inhibited shoot elongation, especially in barnyardgrass, without any effect on the germination of rice, barnyardgrass or radish even at 3, 000ppm in a petri dish test (Table 1).UY-510 exhibited a higher herbicidal effect in the pre-emergence treatment than in the post-emergence treatment in a pot test (Table 2). Rice plants showed good tolerance to UY-510 and no phytotoxicity was observed when it was applied at their 2 leaf stage (Tables 3, 4, 5). In addition, the herbicide had lower mobility in soil than other herbicides (Fig. 1) and a good residual effect.Thus, UY-510 was found to be quite a promising new herbicide for barnyardgrass control in fields where direct-sowing cultivation of rice is practiced.
日本雑草学会の論文