response of Bromus diandrus and Lolium rigidum to dalapon and glyphosate I: baseline sensitivity

• Published in: Weed research Vol. 50; no. 4; pp. 312 - 319
• Main Authors: BARROSO, J, LOUREIRO, I, ESCORIAL, M.C, CHUECA, M.C
• Format: Journal Article
• Language: English
• Published: Oxford, UK Oxford, UK : Blackwell Publishing Ltd 01.08.2010; Blackwell Publishing Ltd; Wiley-Blackwell
• Subjects: annual ryegrass; Biological and medical sciences; coleoptile length; Fundamental and applied biological sciences. Psychology; graminicide; great brome; herbicide resistance; Lolium multiflorum; Mediterranean ryegrass; Parasitic plants. Weeds; Petri dish bioassay; Phytopathology. Animal pests. Plant and forest protection; plant assay; Weeds; Monocotyledones; coleoptile length; Systemic; Lolium rigidum; Glyphosate; Organic acids; Assay; Plant part; Carboxylic acid; Gramineae; Saturated aliphatic compound; Weed science; Mediterranean ryegrass; Angiospermae; Coleoptile; Alkanoic acid; Pesticide resistance; Technical equipment; Organic compounds; Bioassay; Weed; Aliphatic compound; Pesticides; annual ryegrass; Organic phosphonate; Dalapon; Response; plant assay; Sensitivity resistance; Equipment; Bromus; great brome; Petri dish bioassay; Herbaceous plant; Spermatophyta; Fodder crop; herbicide resistance; Mediterranean region; Graminicide
• ISSN: 0043-1737; 1365-3180
• DOI: 10.1111/j.1365-3180.2010.00782.x

The establishment of Bromus diandrus and Lolium rigidum baseline sensitivity to glyphosate and dalapon herbicides was studied for the North Central region of Spain. A rapid method in Petri dishes and a plant assay method were evaluated. The studied populations of both weed species showed sensitivity to both herbicides. The rapid method to establish the sensitivity baseline for these species worked properly for dalapon and a good correlation was found between Petri dish and plant assays. In the case of glyphosate, the rapid method was not sensitive enough, so baseline sensitivity establishment would have to be determined with plant assays. The baseline sensitivities will allow us to determine quickly and accurately any variation in the sensitivity of these weeds against these herbicides over time and to detect, at an early stage, the beginning of any trends towards resistance.