Screening rice varieties for allelopathic potential agasint arrowhead (Sagittaria montevidensis), an aquatic weed infesting Australian Riverina rice crops

Alexa Seal, James Pratley, Terrence Haig, Laurie Lewin

Research output: Contribution to journalArticle

23 Citations (Scopus)

Abstract

Twenty-eight rice varieties with different countries of origin, maturity and stage of improvement were screened in the laboratory for allelopathic potential against arrowhead. Initial rice-density experiments established appropriate bioassay parameters and demonstrated that arrowhead response to rice root exudates follows a typical dose'response curve. Results from the equal compartment agar method (ECAM) bioassay showed that a range of allelopathic potential exists in rice germplasm. This work, together with other published studies suggests such potential to be species specific. In this study, the degree of root inhibition ranged from 26.6 to 99.7%. The potential allelopathic effect of arrowhead on rice seedlings was determined to be negligible.
Original languageEnglish
Pages (from-to)673-680
Number of pages8
JournalCrop and Pasture Science
Volume55
Issue number6
DOIs
Publication statusPublished - 2004

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