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Smooth Cordgrass (Spartina alterniflord) Control with Imazapyr

机译：用Imazapyr防治平滑草（Spartina alterniflord）

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摘要

Outside its native range, smooth cordgrass is a noxious weed in estuaries throughout the world. Trials were conducted to evaluate smooth cordgrass control with imazapyr at various timings, rates, and spray volumes, and with several surfactants; comparisons were made with glyphosate, the sole herbicide registered in the United States for estuarine use. Across years, all sites, application dates, and experiments, it was found that smooth cordgrass control with imazapyr at 1.68 kg/ha was better and more consistent than with glyphosate at 8.4 kg/ha. Control with imazapyr at 0.84 kg/ha was comparable to control with glyphosate at 8.4 kg/ha. The time between application and tidal inundation over the canopy affected the efficacy of imazapyr less than that of glyphosate. There was a lack of consistent effects across dates of application. For imazapyr, a higher application volume (467 L/ha) usually provided better control than did the low volume (93 L/ha), but excellent control was achieved using ultra-low application volumes (23 and 47 L/ha) if the dry time was greater than 12 h. Several surfactants provided comparable efficacy for imazapyr.
机译：在其原生范围之外，光滑的禾本科草是全世界河口中的一种有害杂草。进行了一些试验，以评估在不同的时间，速率和喷雾量下使用imazapyr以及几种表面活性剂对平滑草的防治效果。与草甘膦作了比较，草甘膦是在美国注册用于河口的唯一除草剂。多年以来，在所有地点，施用日期和实验中，发现与8.4 kg / ha的草甘膦相比，使用imazapyr的平滑草防治效果更好，更一致。吡虫啉0.84 kg / ha的防治效果与草甘膦8.4 kg / ha的防治效果相当。从施用到潮汐在树冠上浸没之间的时间影响，吡虫啉的药效比草甘膦的药效低。整个申请日期都缺乏一致的效果。对于imazapyr，较高的施用量（467 L / ha）通常比较小的施用量（93 L / ha）提供更好的控制，但是如果使用超低施用量（23和47 L / ha），则可以实现出色的控制。干燥时间大于12小时。几种表面活性剂为吡虫啉提供了相当的功效。

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  • 来源
    《Weed technology》 |2003年第4期|p.826-832|共7页
  • 作者

    KIM PATTEN;

  • 作者单位

    Washington State University Long Beach Research and Extension Unit, 2907 Pioneer Road, Long Beach, WA 98631;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 植物保护;
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