1997～1999年在水稻插秧田和直播田做了YRC2388防除杂草试验 ,结果表明 ,YRC2388对水稻安全 ,对稗草防除效果好 ,施药适期长 ,持效期长。在插秧田YRC238850 %WP100～150ai.g/hm2加农得时10%WP37.5ai.g/hm2于稗草1～1.5叶期 ,或YRC238850%WP150～200ai.g/hm2 加农得时10%WP45ai.g/hm2 于稗草2～2.5叶期施药 ,在直播田YRC238850%WP150～180ai.g/hm2加农得时10 %WP37.5ai.g/hm2于稗草1.5～2叶期 ,或YRC238850%WP180～225ai.g/hm2 加农得时10 %WP45ai.g/hm2 于稗草2～2.5叶期施药 ,可有效防除稗草及阔叶杂草 YRC2388 weed control experiment was conducted in rice seedling field and direct seeding field from 1997 to 1999. The results showed that YRC2388 had good control effect on barnyard grass and good control effect on barnyard grass. 10% WP37.5ai.g / hm2 on barnyardgrass 1 ~ 1.5 leaf stage, or 10% WP45ai on YRC238850% WP150 ~ 200ai.g / hm2 when used on paddy field YRC238850% WP100 ~ 150ai.g / hm2. g / hm2 in barnyardgrass2 ~ 2.5 leaf stage application, in the direct sowing field YRC238850% WP150 ~ 180ai.g / hm2 plus agricultural gain 10% WP37.5ai.g / hm2 in barnyard grass 1.5 ~ 2 leaf stage, or YRC238850% WP180 ~ 225ai.g / hm2 10% WP45ai.g / hm2 for Cannula is applied to barnyardgrass at 2 ~ 2.5 leaf stage, which can effectively control barnyard grass and broadleaf weeds