Hair fescue is a common tuft-forming perennial grass weed that reduces yields and hinders mechanical harvest in lowbush blueberry fields. PRE terbacil applications traditionally controlled hair fescue but currently only provide suppression in most fields. Terbacil use has not, however, been evaluated in conjunction with other currently registered herbicides in lowbush blueberry. The objective of this research was to evaluate a range of terbacil-based herbicide treatments for hair fescue management in lowbush blueberry. The experiment was conducted at three lowbush blueberry fields in Nova Scotia, Canada. Spring nonbearing-year terbacil applications (2,000 g ai ha–1) exhibited variable efficacy on hair fescue with reduced total tuft density at one site and reduced flowering-tuft density and flowering-tuft inflorescence number at two sites. Suppression was limited to the year of application only. Terbacil followed by (fb) foramsulfuron (35 g ai ha–1) did not improve suppression. A terbacil tank mixture with glufosinate (750 ai ha–1), however, reduced flowering-tuft density and flowering-tuft inflorescence number at each site and reduced total tuft density at one site, suggesting improved suppression with terbacil + glufosinate relative to terbacil alone. Terbacil + glufosinate fb foramsulfuron gave additional reductions in total tuft density at two sites and reduced bearing-year flowering-tuft density at two sites, indicating that hair fescue suppression with this herbicide combination extends into the bearing year. Although less effective than the industry standard pronamide applications, terbacil + glufosinate or terbacil + glufosinate fb foramsulfuron could be used as part of a weed management program for hair fescue in lowbush blueberry.

中文翻译：

---

基于terbacil的除草剂处理低丛蓝莓毛羊茅（Festuca filiformis）管理的评价

毛羊茅是一种常见的形成丛生的多年生草本杂草，会降低产量并阻碍低丛蓝莓地的机械收割。PRE terbacil 应用传统上控制毛发羊茅，但目前仅在大多数领域提供抑制。然而，Terbacil 的使用尚未与其他目前在低丛蓝莓中注册的除草剂一起进行评估。本研究的目的是评估一系列基于 terbacil 的除草剂处理方法，用于处理低丛蓝莓的毛发羊茅。该实验在加拿大新斯科舍省的三个低灌木蓝莓地进行。春季非生育年 terbacil 应用 (2,000 g ai ha–1) 对毛发羊茅表现出不同的功效，其中一个部位的总簇密度降低，两个部位的开花簇密度和开花簇花序数降低。抑制仅限于申请年份。Terbacil 其次是 (fb) foramsulfuron (35 g ai ha–1) 没有改善抑制。含有草铵膦的 terbacil 罐混合物（750 ai ha–1) 然而，降低了每个位点的开花簇密度和开花簇花序数，并降低了一个位点的总簇密度，这表明与单独的 terbacil 相比，terbacil + 草铵膦的抑制效果有所改善。Terbacil + 草铵膦 fb foramsulfuron 进一步降低了两个地点的总簇绒密度，并降低了两个地点的生育年开花簇密度，这表明使用这种除草剂组合的毛发羊茅抑制延伸到生育年。虽然不如工业标准的普萘胺应用效果那么好，但特巴菌素 + 草铵膦或特巴菌素 + 草铵膦 fb foramsulfuron 可用作低丛蓝莓毛发羊茅杂草管理计划的一部分。