Effects of nitrogen availability and spore concentration on the biocontrol activity of Ascochyta caulina in common lambsquarters (Chenopodium album)

R. Ghorbani, P.C. Scheepens, W. van der Zweerde, C. Leifert, A.J.S. McDonald, W. Seel

    Research output: Contribution to journalArticleAcademicpeer-review

    13 Citations (Scopus)

    Abstract

    Common lambsquarters is an annual weed of many important crops. Ascochyta caulina is a plant pathogenic fungus that causes necrotic lesions on the leaves and stems of common lambsquarters. The objective of the present study was to estimate the effect of plant N supply on the biocontrol activity of A. caulina isolates against common lambsquarters. In greenhouse experiments replicated groups of common lambsquarters plants raised with different N supplies were sprayed with various isolates and concentrations of A. caulina 3 wk after planting. Height, number of leaves, total leaf area, fresh and dry weight, and tissue N concentration of common lambsquarters 4 wk after emergence increased significantly with increasing N supply. Disease development was positively related to increasing plant tissue N and also to increasing spore concentration. Fungal spore concentration also had a positive effect on the plant tissue N percentage. Ascochyta caulina isolate W90-1 caused a greater dry weight reduction in common lambsquarters than isolates I-001 and NW-6 did
    Original languageEnglish
    Pages (from-to)628-633
    JournalWeed Science
    Volume50
    Issue number5
    DOIs
    Publication statusPublished - 2002

    Fingerprint

    Ascochyta
    Chenopodium album
    biological control
    spores
    nitrogen
    plant tissues
    lesions (plant)
    annual weeds
    fungal spores
    plant pathogenic fungi
    greenhouse experimentation
    leaves
    leaf area
    weight loss
    planting
    stems
    crops

    Keywords

    • pigweed amaranthus-retroflexus
    • sheath blight
    • take-all
    • n-form
    • growth
    • wheat
    • temperature
    • nutrition
    • disease
    • system

    Cite this

    Ghorbani, R. ; Scheepens, P.C. ; van der Zweerde, W. ; Leifert, C. ; McDonald, A.J.S. ; Seel, W. / Effects of nitrogen availability and spore concentration on the biocontrol activity of Ascochyta caulina in common lambsquarters (Chenopodium album). In: Weed Science. 2002 ; Vol. 50, No. 5. pp. 628-633.
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    abstract = "Common lambsquarters is an annual weed of many important crops. Ascochyta caulina is a plant pathogenic fungus that causes necrotic lesions on the leaves and stems of common lambsquarters. The objective of the present study was to estimate the effect of plant N supply on the biocontrol activity of A. caulina isolates against common lambsquarters. In greenhouse experiments replicated groups of common lambsquarters plants raised with different N supplies were sprayed with various isolates and concentrations of A. caulina 3 wk after planting. Height, number of leaves, total leaf area, fresh and dry weight, and tissue N concentration of common lambsquarters 4 wk after emergence increased significantly with increasing N supply. Disease development was positively related to increasing plant tissue N and also to increasing spore concentration. Fungal spore concentration also had a positive effect on the plant tissue N percentage. Ascochyta caulina isolate W90-1 caused a greater dry weight reduction in common lambsquarters than isolates I-001 and NW-6 did",
    keywords = "pigweed amaranthus-retroflexus, sheath blight, take-all, n-form, growth, wheat, temperature, nutrition, disease, system",
    author = "R. Ghorbani and P.C. Scheepens and {van der Zweerde}, W. and C. Leifert and A.J.S. McDonald and W. Seel",
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    Effects of nitrogen availability and spore concentration on the biocontrol activity of Ascochyta caulina in common lambsquarters (Chenopodium album). / Ghorbani, R.; Scheepens, P.C.; van der Zweerde, W.; Leifert, C.; McDonald, A.J.S.; Seel, W.

    In: Weed Science, Vol. 50, No. 5, 2002, p. 628-633.

    Research output: Contribution to journalArticleAcademicpeer-review

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    AU - Scheepens, P.C.

    AU - van der Zweerde, W.

    AU - Leifert, C.

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    AU - Seel, W.

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