Testing crop row placement and pre-emergence herbicide options for brome grass on Mallee sand

Brome grass is the costliest weed to grain production in the Mallee region despite herbicide resistance being relatively low. This paper brings together research trials from 2015 and 2016 addressing the potential for greater efficacy of pre-emergence herbicides on brome and the potential for better crop competition on non-wetting sands. For growers looking to often seed earlier and reduce reliance on Group B herbicides, pre-emergence herbicides can be an important part of brome management strategies but trifluralin often has limited efficacy. Previous trials at the MSF Karoonda site looking at a range of pre-emergence herbicides have shown the potential for greater than 75% brome control, but also the potential for variability under different early-season conditions. Improving crop competition can greatly improve herbicide efficacy. Other trials on non-wetting sandy soil at the Karoonda site have shown the potential for better crop establishment and large reductions in brome seed set suppression through seeding the crop on or near last year’s crop row (e.g. McBeath et al 2015). In 2016 the interactions between pre-emergence herbicide options and crop row placement were investigated.雀麦草（Brome grass）是马利（Mallee）地区粮食生产中经济损失最为惨重的杂草，尽管其除草剂抗性相对较低。本研究整合了2015与2016年的相关试验，旨在探究提升出苗前除草剂（pre-emergence herbicides）对雀麦草防效的潜力，以及改善非湿砂性土壤中作物竞争能力的可行方案。对于倾向于早播、希望降低对B组除草剂依赖程度的种植者而言，出苗前除草剂是雀麦草综合管理策略的重要组成部分，但氟乐灵（trifluralin）的防效通常较为有限。此前在MSF卡隆达（Karoonda）试验站点开展的多种出苗前除草剂测试试验显示，雀麦草防效可突破75%，但不同早季环境条件下防效存在显著波动。提升作物竞争能力可显著强化除草剂的防除效果。此外，卡隆达试验站点针对非湿砂性土壤开展的其他试验表明，将作物播种于上年作物行或其邻近区域，可有效提升作物出苗率，并大幅增强对雀麦草结实的抑制作用（如McBeath等，2015）。2016年的试验则进一步探究了出苗前除草剂选型与作物行布局之间的交互效应。

搜集汇总

背景与挑战

背景概述

该数据集整合了2015年和2016年在澳大利亚Mallee地区进行的农业试验，重点研究芽前除草剂对雀麦草的控制效果以及作物行放置策略在非湿润沙地上的应用。研究旨在通过优化除草剂使用和作物竞争来管理雀麦草，以支持谷物生产，涉及主题包括农业科学、作物生产和杂草管理。