Experiments were established in producers' fields to evaluate the effects of late-season herbicide applications on the red rice and barnyardgrass seedbank. Glyphosate and fluazifop were applied once or twice, at 0.25, 0.5, and 1 times the labeled rate of 0.84 kg ae/ha and 0.21 kg ai/ha, respectively. Applications were made when annual grasses flowered; second application was 20 d later. Glyphosate applied twice each year at the 0.5 X rate reduced the barnyardgrass seedbank by 74%, but fluazifop applied sequentially at the 1 X rate reduced the seedbank only 7% after 2 yr. Glyphosate at 0.25 or 0.5 X reduced red rice seed production equal to fluazifop at 1 X, averaged across number of applications (<11 seeds/m2). Glyphosate timings on red rice seed production indicated that glyphosate (0.5 X) applied between 0 and 28 days after green ring (DAGR) effectively reduced red rice seed production.
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机译：在生产者的领域建立了实验，以评估后期除草剂施用对红稻和bar草种子库的影响。草甘膦和氟喹草胺分别以标记的0.84 kg ae / ha和0.21 kg ai / ha的施用率分别以0.25、0.5和1倍施用一次或两次。一年生草开花时进行申请；第二次申请是20天后。每年以0.5 X的比率施用两次草甘膦会使the草的种子库减少74％，但是以1 X的比率依次施用的氟喹草胺在2年后仅使种子库减少7％。草甘膦在0.25或0.5 X时减少的红米种子产量等于在1 X时的fluazifop，在整个施用次数中平均（<11种子/ m 2 ）。草甘膦对红米种子生产的时间安排表明，在绿环（DAGR）后0至28天之间施用草甘膦（0.5 X）有效降低了红米种子的生产。
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