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Evaluation of potential biocontrol agents against Claviceps africana in vitro and in vivo

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Bhuiyan, S.A., Ryley, M.J., Galea, V.J. and Tay, D. (2003) Evaluation of potential biocontrol agents against Claviceps africana in vitro and in vivo. Plant Pathology, 52 (1). pp. 60-67.

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Article Link: http://dx.doi.org/10.1046/j.1365-3059.2003.00799.x

Publisher URL: http://www.blackwell-synergy.com


Undiluted culture filtrates of two commercial products of Trichoderma spp., Trichopel and Trichoflow, and two isolates of Penicillium citrinum completely inhibited the conidial germination of macroconidia of Claviceps africana, the cause of ergot or sugary disease of sorghum (Sorghum bicolor) in vitro. Similarly, Pseudomonas aeruginosa and Burkholderia cepacia completely inhibited macroconidial germination, with the former being more effective at high dilutions. In contrast, these bacterial isolates failed to inhibit infection in vivo in glasshouse tests with ergot-inoculated sorghum, but all fungal biocontrol agents (including an isolate of Epicoccum nigrum) reduced the severity of disease (percentage of infected spikelets per panicle), in some cases completely inhibiting the development of ergot. In a second glasshouse trial, optimum control was achieved when the biocontrol agents were applied 3-7 days before inoculation with conidia of C. africana.

Item Type:Article
Corporate Creators:Department of Employment, Economic Development and Innovation (DEEDI), Agri-Science, Crop and Food Science
Business groups:Crop and Food Science
Additional Information:© Blackwell Publishing Ltd.
Keywords:Trichoderma spp.; isolates; Trichopel; Trichoflow; Penicillium citrinum; Claviceps africana; ergot; sugary disease.
Subjects:Plant pests and diseases > Pest control and treatment of diseases. Plant protection > Organic plant protection. Biological control
Live Archive:26 Feb 2004
Last Modified:03 Sep 2021 16:43

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