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首页> 外文期刊>Weed technology >Control of Sericea Lespedeza (Lespedeza cuneata) with Triclopyr, Fluroxypyr, and Metsulfuron
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Control of Sericea Lespedeza (Lespedeza cuneata) with Triclopyr, Fluroxypyr, and Metsulfuron

机译：用三氯吡r，氟吡草铵和甲磺隆对绢毛蝶的防治（Lespedeza cuneata）

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摘要

Sericea lespedeza is an invasive weed in the tallgrass prairies of the Southern Great Plains. Field experiments were initiated in 1995 at three locations in central Oklahoma to evaluate control of sericea lespedeza for several years after treatment with herbicide. Herbicide treatments included triclopyr at 560 and 840 g ae/ha, fluroxypyr at 210 and 560 g ae/ha, and metsulfuron at 13 and 21 g ai/ha applied at simple-stem (SS), branched-stem (BS), and flowering (FL) growth stages of sericea lespedeza. At all three locations, applications of triclopyr and fluroxypyr at the BS growth stage resulted in less than 4% of the pretreatment sericea lespedeza stem density remaining in the first growing season after treatment (GSAT). Metsulfuron applied at the FL growth stage resulted in 0 to 9% of the pretreatment stem density remaining in the first GSAT. Regardless of rate, triclopyr and fluroxypyr applied at the BS growth stage provided the most consistent long-term control of sericea lespedeza. Percentage of pretreatment stem density remaining with these treatments was 0 to 20% at two locations in the third GSAT, and 4 to 15% at one location in the fifth GSAT. Aboveground biomass yields of desirable grasses (bermudagrass, indiangrass, and little bluestem) at two locations were greater than that of the untreated check in the second and third GSAT in all herbicide treatments. But biomass yield of bermudagrass did not increase when sericea lespedeza was controlled at the location with eroded soil conditions.
机译：Sericea lespedeza是南部大平原高草草原上的一种入侵性杂草。 1995年在俄克拉荷马州中部的三个地点开始了实地试验，以评估除草剂处理后多年来对多年生黑穗病的防治。除草剂的处理方法包括：在560和840 g ae / ha的喷草虫，在210和560 g ae / ha的氟草烟和在13和21 g ai / ha的甲磺隆在单茎（SS），支干（BS）和绢毛蝶的开花（FL）生长阶段。在这三个位置上，在BS生长阶段施用三氯吡喃和氟草烟导致在处理后的第一个生长季节（GSAT）残留的预处理的绢毛病茎秆密度不到4％。在FL生育阶段施用甲磺隆导致在第一个GSAT中保留0-9％的预处理茎密度。不论速率如何，在BS生长阶段施用的敌百虫和氟草烟都可以最有效地长期控制绢毛病。这些处理剩余的预处理茎密度百分比在第三个GSAT中的两个位置为0％至20％，在第五个GSAT中的一个位置为4％至15％。在所有除草剂处理中，第二个和第三个GSAT中两个位置的理想草（百慕大，印度草和小蓝茎）的地上生物量产量要高于未处理的草。但是，在土壤条件受到侵蚀的情况下，将丝纹鸢尾草控制在该位置时，百慕大草的生物量产量没有增加。

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