Morphological diversity, pathogenicity and biofungicides efficacity on Cercospora arachidicola strains causal agent of early leaf spot disease of groundnut

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Research Paper 10/12/2023
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Morphological diversity, pathogenicity and biofungicides efficacity on Cercospora arachidicola strains causal agent of early leaf spot disease of groundnut

Adama Zongo, Abalo Itolou Kassankogno, Abel T. Nana, Parfait Juste W. Zombre, Ibrahima Ouedraogo
Int. J. Agron. Agri. Res.23( 6), 1-9, December 2023.
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Abstract

Fungal diseases are one of major constraints on groundnut production in Burkina Faso. Among these diseases, early leaf spot caused by Cercospora arachidicola (Hori.) is one of the most important economic diseases of groundnut. Aim of contributing to search effective control methods against this disease, we undertook the present study, which consisted in (i) study morphological diversity of different Cercospora arachidicola isolates (ii) study the level of pathogenicity of Cercospora arachidicola strains identified (iii) evaluate the efficacy of some bio-fungicides on the strains identified. The study was carried out in 14 villages in the Hauts Bassins and Boucle du Mouhoun regions of Burkina Faso with regard to prospecting and sample collection, and at the INERA Bobo Dioulasso plant pathology laboratory for isolation, identification, pathogenicity and biofungicide efficacy testing. A total of five strains of Cercospora arachidicola were identified. The pathogenicity test was used to classify the five strains according to their virulence. In decreasing order of virulence, the strains were Fara, Darsa, Logo, Santi and Kod. In vitro evaluation of biofungicide efficacy shows that PLANSAIN biofungicide provides better control of Cercospora arachidicola strains. Trichoderma hazanium, the active ingredient in PLANSAIN, inhibits the radial growth of Cercospora arachidicola strains to a greater extent.

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