Weed suppression by Canadian spring cereals: relative contribution of competition for resources and allelopathy
- 127 Downloads
Integrated and more sustainable weed management practices are in great demand all around the globe. The adoption of more weed-suppressive cereal cultivars could be part of an integrated weed management strategy. Recently, a study was published analysing the relative contribution of above-ground competition and allelopathy to weed suppression of Scandinavian winter cereals at the field level. The present study used the same approach with Canadian spring wheat and triticale cultivars, and confirmed the results of the previous study. The competitive traits such as leaf area index, crop height and early vigour, and the allelochemicals belonging to the chemical group of benzoxazinoids measured in the root zone were of equal importance to explain the variance of weed biomass at the field level. In addition, a dendogram showed large genetic variability for competitive and allelopathic traits in the Canadian spring cereals, providing the genetic basis for the initiation of breeding programmes for more weed-suppressive cultivars.
KeywordsTriticum aestivum Triticosecale benzoxazinoid HPLC–MS/MS Field trial
Thanks to the staff from Lethbridge Research and Development Centre, Canada, for conducting field experiments and providing seed material.
- Bertholdsson NO, Andersson SC, Merker A (2012) Allelopathic potential of Triticum spp., Secale spp. and Triticosecale spp. and use of chromosome substitutions and translocations to improve weed suppression ability in winter wheat. Plant Breed 131(1):75–80. https://doi.org/10.1111/j.1439-0523.2011.01895.x CrossRefGoogle Scholar
- Lamichhane JR, Aubertot JN, Begg G, Birch ANE, Boonekamp P, Dachbrodt-Saaydeh S, Hansen JG, Hovmoller MS, Jensen JE, Jorgensen LN, Kiss J, Kudsk P, Moonen AC, Rasplus JY, Sattin M, Streito JC, Messean A (2016) Networking of integrated pest management: A powerful approach to address common challenges in agriculture. Crop Prot 89:139–151. https://doi.org/10.1016/j.cropro.2016.07.011 CrossRefGoogle Scholar
- Worthington M, Reberg-Horton SC, Brown-Guedira G, Jordan D, Weisz R, Murphy JP (2014) Relative contributions of allelopathy and competitive traits to the weed suppressive ability of winter wheat lines against Italian ryegrass. Crop Sci 55(1):57–64. https://doi.org/10.2135/cropsci2014.02.0150 CrossRefGoogle Scholar