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

• Published in: Weed science Vol. 41; no. 4; pp. 594 - 599
• Main Authors: Blackshaw, Robert E., Schaalje, G. Bruce
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 01-12-1993; Weed Science Society of America
• Subjects: Agronomy. Soil science and plant productions; analisis estadistico; analyse statistique; Analysis of variance; biologia; Biological and medical sciences; Biological competition; biologie; biology; competencia biologica; competition biologique; contenido de materia seca; densidad de la poblacion; densite de population; Density; dry matter content; Fundamental and applied biological sciences. Psychology; Generalities, botany, ecology, damages, economic importance; geraniaceae; growth rate; indice de crecimiento; Interspecific competition; Intraspecific competition; Leaf area; malezas; malva; mauvaise herbe; Modeling; Parasitic plants. Weeds; Phytopathology. Animal pests. Plant and forest protection; Plant growth; Plant interaction; plant population; Plants; poblacion vegetal; population density; population vegetale; statistical analysis; stems; superficie foliar; surface foliaire; tallo; taux de croissance; teneur en matiere seche; tige; Weed Biology and Ecology; Weeds; MALNE; Redstem filaree, Erodium cicutarium (L.) L'Her. ex Ait. # EROCI; stork's-bill; EROCI; round-leaved mallow, Malva pusilla Sm. # MALNE; weed biology; Competition-methodology; Competition; Weed; Check; Environment; Yield; Simulation model; Leaf area; Expansion
• ISSN: 0043-1745; 1550-2759
• DOI: 10.1017/S0043174500076372

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.