Allelopathic potential of root exudates of lucerne on annual ryegrass

Hasan Muhammad Zubair, Min An, James Pratley, Alan Humphries

Research output: Book chapter/Published conference paperConference paperpeer-review

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Lucerne (Medicago sativa L.), also known as alfalfa in other countries, is a highly productive forage legume producing high quality feed for
livestock. Yields deteriorate due to weed infestation. Herbicides are a key strategy for weed control, but the evolution of weeds resistant to herbicides requires consideration of alternative options such as allelopathic lucerne varieties for weed suppression. To evaluate
the allelopathic prospects of lucerne, a laboratory based root exudates bioassay was conducted using the equal-compartment-agar method (ECAM). The allelopathic effects of different growth periods (0, 2,
4, 6, 8, 11, 15 days) and density (0, 5, 10, 15, 20, 30, 40, 50 pre-germinated seeds per beaker) of lucerne (var. Genesis) against annual ryegrass (Lolium rigidum Gaudin) were investigated. The root and shoot lengths of annual ryegrass were measured. Results indicated that lucerne growth for 4–8 days had the most inhibitive effect on the root growth of annual ryegrass. The root inhibition of annual ryegrass was increased with increasing density of lucerne. Growth period and density of lucerne however did not affect the shoot growth of annual ryegrass.
Original languageEnglish
Title of host publicationProceedings of the 19th Australasian Weed Conference (2014)
Subtitle of host publicationScience, Community and Food Security: the Weed Challenge
EditorsMatthew Baker
Place of PublicationHobart
PublisherTasmanian Weed Society Inc
Number of pages3
ISBN (Electronic)978-0-646-92454-0
Publication statusPublished - 2014
Event19th Australasian Weeds Conference (2014) - Hotel Grand Chancellor, Hobart, Australia
Duration: 01 Sept 201404 Sept 2014


Conference19th Australasian Weeds Conference (2014)
Abbreviated titleScience, Community and Food Security: the Weed Challenge
Internet address


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