weed control potential of oat cultivars

Winter-killed oats (Avena sativa) may have potential for use to suppress weeds in early seeded crops such as pea (Pisum sativum). Residue biomass and surface coverage are generally correlated with weed suppression. Oat residues also contain allelochemicals. Our objective was to determine if oat cult...

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Bibliographic Details
Published in:HortTechnology (Alexandria, Va.) Va.), 2005, Vol.15 (1), p.140-145
Main Authors: Grimmer, O.P, Masiunas, J.B
Format: Article
Language:English
Subjects:
allelochemicals
allelopathy
Avena sativa
biological control
biomass
Capsella bursa-pastoris
Chenopodium album
cover crops
crop residues
cultivars
oats
peas
Pisum sativum
seed germination
weed control
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Summary:Winter-killed oats (Avena sativa) may have potential for use to suppress weeds in early seeded crops such as pea (Pisum sativum). Residue biomass and surface coverage are generally correlated with weed suppression. Oat residues also contain allelochemicals. Our objective was to determine if oat cultivars vary in residue production and allelopathy. Differences between oat cultivars were observed in residue production, and for effects on emergence of common lambsquarters (Chenopodium album) and shepherd's-purse (Capsella bursa-pastoris) in the greenhouse, and germination of pea and common lambsquarters in an infusion assay. Two of the oat cultivars producing the greatest biomass, 'Blaze' (in the field) and 'Classic' (in the greenhouse), interfered minimally with pea germination and were among the best cultivars in inhibiting common lambsquarters and shepherd's-purse. 'Blaze' also greatly inhibited common lambsquarters germination in the infusion assay that measured allelopathy. Thus, 'Blaze' and 'Classic' possess suitable characteristics for use as a cover crop preceding peas.
ISSN:1063-0198
1943-7714
DOI:10.21273/horttech.15.1.0140