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Density and Species Proportion Effects on Interference between Redstem Filaree (Erodium cicutarium) and Round-Leaved Mallow (Malva pusilla)

Published online by Cambridge University Press:  12 June 2017

Robert E. Blackshaw  and
G. Bruce Schaalje
Robert E. Blackshaw
Affiliation:
Agric. Can. Res. Stn., Lethbridge, AB, Canada T1J 4B1
G. Bruce Schaalje
Affiliation:
Agric. Can. Res. Stn., Lethbridge, AB, Canada T1J 4B1
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Abstract

Interference between redstem filaree and round-leaved mallow was studied under controlled environmental conditions. Each species was grown in monoculture at densities of 2, 4, 8, and 12 plants per 20-cm-diam pot and in mixtures at all possible combinations of these densities. Leaf area per plant was similar for both species but round-leaved mallow grew taller and produced more shoot biomass than redstem filaree when each was grown in monoculture. Mixed culture responses varied with the proportion density of each species. A reciprocal yield model was tested and modified to account for this significant density interaction. When grown in mixture, round-leaved mallow usually gained in leaf area and shoot biomass at the expense of redstem filaree indicating that it was the superior competitor. Calculated competition ratios indicate that round-leaved mallow was about twice as competitive as redstem filaree under the growing conditions of this study.

Keywords

Redstem filaree, Erodium cicutarium (L.) L'Her. ex Ait. # EROCIround-leaved mallow, Malva pusilla Sm. # MALNECompetition-methodologystork's-billweed biologyEROCIMALNE
Type
Weed Biology and Ecology
Information
Weed Science , Volume 41 , Issue 4 , December 1993 , pp. 594 - 599
Copyright
Copyright © 1994 by the Weed Science Society of America 

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