Stanton Rex A, Pratley James E, Hudson David, Dill Gerald M
EH Graham Centre, Charles Sturt University, Locked Bag 588, Wagga Wagga, NSW 2678, Australia.
Pest Manag Sci. 2008 Apr;64(4):402-8. doi: 10.1002/ps.1511.
Glyphosate resistance has been confirmed in 58 populations of Lolium rigidum (Gaud.), a major weed of crops in southern Australia. Extensive use of glyphosate in conjunction with minimal soil disturbance has been identified as high risk for resistance to that herbicide. Land managers need a simple method for rapid assessment of the risk of resistance occurring as a result of past and proposed future management practices. Modelled on risk assessment nomographs, a simple calculator for indicating the risk of evolved glyphosate resistance in L. rigidum is described.
The calculator uses the generations since first use and the frequency of use of glyphosate in combination with historical cultivation levels as critical factors for determining the risk of glyphosate resistance evolution. Based on the management history of a field, a land manager can graphically determine a glyphosate resistance risk for that field.
The calculator enables the farmer or the advisor to assess the risk of a weed's population becoming resistant and modify practices accordingly to manage for sustainable glyphosate use. The risk calculator could be modified for other herbicides and different weed species.
在澳大利亚南部主要的作物杂草硬直黑麦草（Lolium rigidum (Gaud.)）的58个种群中已证实存在草甘膦抗性。大量使用草甘膦并伴以极少的土壤扰动已被认定为产生该除草剂抗性的高风险因素。土地管理者需要一种简单的方法，以便快速评估因过去和未来拟采用的管理措施而产生抗性的风险。本文描述了一种以风险评估列线图为模型、用于指示硬直黑麦草产生草甘膦抗性风险的简易计算器。
该计算器将首次使用草甘膦后的代数、草甘膦的使用频率以及历史种植水平作为决定草甘膦抗性进化风险的关键因素。基于某块田地的管理历史，土地管理者能够以图表形式确定该田地的草甘膦抗性风险。
该计算器使农民或顾问能够评估杂草种群产生抗性的风险，并相应地调整措施，以实现草甘膦的可持续使用。该风险计算器可针对其他除草剂和不同杂草种类进行修改。
