Potential of fungal antagonists for biocontrol of toxigenic Fusarium spp. in wheat and maize through competition in crop debris

L. Luongo, M. Galli, L. Corazza, E.T.M. Meekes, B.H. de Haas, C.H. Lombaers-van der Plas, J. Köhl

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    Abstract

    Pathogenic Fusarium spp. cause head blight in wheat or ear rot in maize leading to yield losses and also a reduction in quality due to mycotoxin contamination of the grain. Infected crop residues are the main inoculum source for epidemics. Saprophytic fungi, obtained from cereal tissues or necrotic tissues of other crops, were screened for their ability to colonise wheat straw and maize stalks and to suppress sporulation of pathogenic Fusarium spp. Results of bio-assays conducted under controlled conditions were variable among Fusarium spp. and host substrates for most antagonists tested, such as yeasts, Trichoderma spp. and non-pathogenic Fusarium spp. Isolates of Clonostachysrosea consistently suppressed sporulation of F. culmorum and F. graminearum on wheat straw, and of F. culmorum, F. graminearum, F. proliferatum and F. verticillioides on maize stalks. Isolates of C. rosea, C. cladosporioides and F. equiseti were applied to pieces of maize stalks or flowering ears in preliminary experiments conducted under field conditions. The colonisation of stalk pieces by pathogenic Fusarium spp. was assessed after 9 months. Colonisation of stalk pieces by pathogenic Fusarium spp. was significantly reduced at several sampling dates. However, results obtained with the antagonists were not consistent for all sampling dates and between experiments
    Original languageEnglish
    Pages (from-to)229-242
    JournalBiocontrol Science and Technology
    Volume15
    Issue number3
    DOIs
    Publication statusPublished - 2005

    Keywords

    • head blight
    • moniliforme
    • dispersal
    • survival
    • botrytis
    • fields
    • plots
    • corn

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