Trichoderma longibrachiatum as an antagonist of Botrydiplodia theobromae

The antagonistic potential of Trichoderma longibrachiatum against the pathogen Botrydiplodia theobromae was examined in vitro. Both fungi were paired on 9 cm Petri plates of acidified potato dextrose agar (APDA). Three pairing methods were employed, viz., 'inoculating antagonist before pathogen...

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Published in:Archiv für Phytopathologie und Pflanzenschutz 2010-03, Vol.43 (5), p.479-484
Main Authors: Sobowale, A. A., Jonathan, S. G., Odu, B. O., Ayansina, A. D.V., Ojikutu, T. K.
Format: Article
Language:English
Subjects:
antagonist
Botrydiplodia theobromae
growth inhibition
pathogen
Solanum tuberosum
Tichoderma longibrachiatum
Trichoderma longibrachiatum
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Summary:The antagonistic potential of Trichoderma longibrachiatum against the pathogen Botrydiplodia theobromae was examined in vitro. Both fungi were paired on 9 cm Petri plates of acidified potato dextrose agar (APDA). Three pairing methods were employed, viz., 'inoculating antagonist before pathogen', 'inoculating pathogen before antagonist' and 'simultaneous inoculation of pathogen and antagonist'. Radial growth (cm) of both fungi were later analysed using the GLM Procedure of SAS. Growth inhibition of B. theobromae by T. longibrachiatum in all pairing methods was significantly different from control (P = 0.05, R 2  = 0.89). Growth inhibition of the pathogen was best when using 'inoculation of antagonist before pathogen'. Duration of pairing (DAP) and pairing method are both critical to significant antagonistic impact of T. longibrachiatum on B. theobromae (P > 0.0001). Inhibition mechanism includes competition for space and nutrients. T. longibrachiatum could thus be a promising antagonist of B. theobromae.
ISSN:0323-5408
1477-2906
DOI:10.1080/03235400701875505