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    Yield losses in soybeans from frogeye leaf spot caused by Cercospora sojina

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    Date
    1991
    Author
    Dashiell, Kenton E.
    Akem, C.N.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Three soybean [Glycine max (L.) Merr.]cultivars (Samsoy 1, TGx 1025-12E and TGx 996-26E) were evaluated for yield losses resulting from frogeye leaf spot caused by Cercospora sojina Hara. Replicated field plots were established at two locations in Nigeria that have a high natural infestation of C. sojina. The cultivars were either not sprayed, sprayed once or sprayed twice during the growing season with the fungicide benomyl. Disease spread early in the season was from border rows of a susceptible soybean cultivar into the plots. Mean disease severity (DS) for unsprayed cultivars ranged from 0.6 to 4.5 on a scale of 0–5. Plots receiving two sprays had lower DS values, ranging from 0.5 to 2.4. Differences between unsprayed and double-sprayed plots for yield and 300-seed weight ranged from 2.5 to 58.8 and 0.6 to 28.6%, respectively. Seed weight was negatively correlated with DS.
    https://doi.org/10.1016/S0261-2194(91)80134-2
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5942
    Digital Object Identifier (DOI)
    https://doi.org/10.1016/S0261-2194(91)80134-2
    IITA Subjects
    Plant Breeding; Pests Of Plants; Plant Diseases; Grain Legumes
    Agrovoc Terms
    Soybeans; Cercospora Sojina; Yields; Seeds
    Regions
    Africa; West Africa
    Countries
    Nigeria
    Collections
    • Journal and Journal Articles4835
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