Search Results for: Lolium rigidum

Abstract: Glyphosate-resistance evolution in weeds is evident globally, especially in areas where transgenic glyphosate-resistant crops dominate. Resistance to glyphosate is currently known in 16 weed species, including rigid ryegrass in Australia. Following the first report of glyphosate resistance in 1998, there are now 78 documented glyphosate-resistant populations of rigid ryegrass in grain-growing regions of southern …

Abstract: Following 15 yr of successful use, glyphosate failed to control a population of the widespread grass weed rigid ryegrass in Australia. This population proved to be resistant to glyphosate in pot dose-response experiments conducted outdoors, exhibiting 7- to 11-fold resistance when compared to a susceptible population. Some cross-resistance to diclofop-methyl (about 2.5-fold) was also …

Abstract: Glyphosate is the world’s most widely used herbicide. A potential substitute for glyphosate in some use patterns is the herbicide paraquat. Following many years of successful use, neither glyphosate nor paraquat could control a biotype of the widespread annual ryegrass (Lolium rigidum), and here the world’s first case of multiple resistance to glyphosate and …

Abstract: Glyphosate resistance was found in Lolium rigidum Gaudin (Rigid ryegrass, LOLRI) in South Africa. Suspected glyphosate-resistant L. rigidum populations were collected and grown under greenhouse conditions. The plants were sprayed with a range of doses of glyphosate 35 days after planting and shoot dry biomass was determined 17 days after herbicide treatment. Based on …

Abstract: Experiments were conducted to determine potential mechanisms of glyphosate resistance in Lolium rigidum from Australia. ‘4C-Glyphosate uptake, translocation, and metabolism were compared between resistant (R) and sensitive (S) biotypes. The R seed (48118a) represented the F, progenies of plants having survived a 1.73-kg ae ha-‘ (4.8 L ha-‘) application of a Roundup formulation. The …

Text: Glyphosate [N-(phosphonomethyl)glycine] is a non-selective, broad spectrum, systemic, post-emergence herbicide that has been used extensively throughout the world over the past three decades. It inhibits the biosynthesis of aromatic amino acids (phenylalanine, tryptophan, and tyrosine), which leads to several metabolic disturbances, including the inhibition of protein and secondary product biosynthesis (Franz et al., 1997) and …

Keywords: Herbicide Resistance, Annual Ryegrass (Lolium rigidum), Bipyridyl Herbicides, Spray Seed, Glyphosate, Australia, Echuca, Hoult surfactant, Glyphosate Resistance Citation: Pratley, J., Baines, P., Eberbach, R., Incerti, M. and Broster, J., 1996. Glyphosate resistance in annual ryegrass. In Proceedings of the 11th Annual Conference of the Grassland Society of New South Wales, p. 126.