An experiment to investigate why glufosinate ammonium control of Lolium spp. is more effective at cooler temperatures than warmer temperatures was conducted at Welgevallen Experimental Farm, Stellenbosch University. Wild Lolium spp. was grown at 10/15, 15/20, 20/25 and 25/30°C (night and day) temperature regimes and treated with glufosinate ammonium at 0, 300, 600, 900 and 1,200 g a.i./ha, 6 weeks after planting. Control of Lolium spp. decreased with increasing temperature. Results from elemental analysis, scanning electron microscopy (SEM), fluorescence imaging and gas chromatography–mass spectrometry (GCMS) investigations allude to calcium accumulation, cuticle thickness and plant phenolic compounds playing roles in the response of Lolium spp. to this herbicide. Increased cuticle thickness and calcium accumulation as temperatures increase indicate promotion of plant defence mechanisms through increased phenolic compound production, which is induced by herbicide stress, hence resulting in poor control of Lolium spp. under warmer temperatures.

中文翻译：

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黑麦草的反应。在不同温度下施用草铵膦铵盐

研究为什么草铵膦控制黑麦草的铵盐的实验。与在斯泰伦博斯大学Welgevallen实验农场进行的较温暖的温度相比，在较凉的温度下更有效。野生黑麦草属。在10 / 15、15 / 20、20 / 25和25/30°C（夜间和白天）温度下生长，并在6周后以0、300、600、900和1200 g ai / ha的草铵膦铵盐处理种植。黑麦草的控制。随着温度升高而降低。元素分析，扫描电子显微镜（SEM），荧光成像和气相色谱-质谱（GCMS）研究的结果暗示钙积累，表皮厚度和植物酚类化合物在黑麦草的响应中起作用spp。这种除草剂。随着温度的升高，表皮厚度和钙积累量的增加表明通过除草剂胁迫诱导的酚类化合物产量的增加，植物防御机制得到了促进，因此导致对黑麦草的控制不佳。在温暖的温度下。