Glyphosate-resistant giant ragweed (Ambrosia trifida L.) in Ontario: Survey and control in soybean (Glycine max L.) Windsor, Belle River, LaSalle, and Amherstburg, Essex County, Ontario [Canada] 2010 and 2011

This dataset is comprised of two surveys examining the control of glyphosate resistant giant ragweed (Ambrosia trifida) in soybean (Glycine max) with 1) preplant herbicides and 2) postemergence herbicides. The objective of the first survey was to evaluate the efficacy of various preplant herbicides for the control of glyphosate-resistant giant ragweed under field conditions in Ontario. A total of 11 field experiments were established on Ontario farms with glyphosate-resistant giant ragweed over a two-year period (2010 and 2011). One set of experiments evaluated herbicides with limited residual activity (enhanced burndown), and a second set of experiments evaluated glyphosate tank mixes with residual herbicides for full season control (burndown plus residual). In 2010, there was one enhanced burndown and one burndown plus residual trial at a location near Windsor (L1). In 2011, there were four enhanced burndown and five burndown plus residual trials at locations near Windsor (L2 and L3), Belle River (L4), LaSalle (L5) and Amherstburg (L6). The objective of the postemergence survey was to determine the level of resistance to glyphosate in different giant ragweed populations, and evaluate the efficacy of various postemergence herbicides for the control of glyphosate-resistant giant ragweed in soybean under field conditions in Ontario. A total of ten field experiments were established on Ontario farms with glyphosate-resistant giant ragweed in 2011. One set of experiments evaluated the response of giant ragweed to varying doses of glyphosate (field dose response), and another set evaluated various herbicides registered for postemergence application in soybean. The experiments were conducted at locations near Windsor (L1 and L2), Belle River (L3), LaSalle (L4) and Amherstburg (L5).

本数据集包含两项调查，旨在探究大豆（Glycine max）田内抗草甘膦巨豚草（glyphosate resistant giant ragweed，Ambrosia trifida）的防控手段，分别针对1）播前除草剂（preplant herbicides）与2）苗后除草剂（postemergence herbicides）展开。
第一项调查的目标为评估各类播前除草剂在安大略省田间条件下防控抗草甘膦巨豚草的效果。研究团队于2010至2011年两年间，在安大略省境内带有抗草甘膦巨豚草的农田中共设置11组田间试验。其中一组试验评估低残留活性除草剂（强化灭生性除草处理，enhanced burndown）的防控效果，另一组试验则评估添加残留型除草剂的草甘膦桶混制剂（glyphosate tank mixes），以实现全季杂草防控（灭生+残留除草）。
2010年，研究团队在温莎附近的一处试验点（L1）分别设置1组强化灭生性除草处理试验与1组灭生+残留除草处理试验。2011年，在温莎附近（L2、L3）、贝尔河（Belle River）、拉萨尔（LaSalle）以及阿默斯特堡（Amherstburg）共5处试验点，设置4组强化灭生性除草处理试验与5组灭生+残留除草处理试验。
苗后除草剂相关调查的目标为明确不同巨豚草种群对草甘膦的抗药性水平，并评估各类苗后除草剂在安大略省田间条件下防控大豆田抗草甘膦巨豚草的效果。2011年，研究团队在安大略省带有抗草甘膦巨豚草的农田中共设置10组田间试验。其中一组试验探究巨豚草对不同梯度草甘膦剂量的响应（田间剂量响应试验，field dose response），另一组试验则评估各类登记用于大豆田苗后施用的除草剂。试验地点涵盖温莎附近（L1、L2）、贝尔河（Belle River）、拉萨尔（LaSalle）以及阿默斯特堡（Amherstburg）。