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    Epidemiology of Stenocarpella macrospora (Earle) Sutton on maize in the midaltitude zone of Nigeria

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    Date
    1999
    Author
    Olatinwo, R.O.
    Cardwell, K.F.
    Deadman, M.L.
    Julian, A.M.
    Type
    Journal Article
    Metadata
    Show full item record
    Abstract/Description
    Disease progress of Stenocarpella macrospora (Earle) Sutton (syn. Diplodia macrospora Earle) was monitored on selected maize breeding lines over two seasons at three locations. Tagged plants were assessed at 10 day intervals for foliar lesions on a 1–9 scale and for ear rot on a 1–5 scale. The level of disease at a farm in Jos (West Africa Milk Company farm) was significantly greater than those at the other two locations (UTC Tenti and Saminaka), which had reduced or zero debris from the previous year's cultivation. There was a significant correlation between the leaf severity score and grain weight, where grain weight decreased with increasing leaf disease severity. However, no significant correlation was observed between ear rot and leaf severity. Varieties responded differently throughout the monitoring period. Late planting (1996) resulted in a significantly reduced disease incidence, but also resulted in lower grain weights. Spatial disease progress diagrams indicated that S. macrospora was initiated from random foci from which secondary spread occurred.
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/4016
    IITA Subjects
    Plant Diseases; Pests Of Plants
    Agrovoc Terms
    Stenocarpella; Maize; Leaf Diseases
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
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