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Antifungal and Biocontrol Evaluation of Four Lysobacter Strains Against Clubroot Disease

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The effect of crude extract (Ce), seed coating agent (SCA) and whole bacterial broth culture (WBC) of Lysobacter strains was evaluated against the causal agent of clubroot formation in Cruciferous… Click to show full abstract

The effect of crude extract (Ce), seed coating agent (SCA) and whole bacterial broth culture (WBC) of Lysobacter strains was evaluated against the causal agent of clubroot formation in Cruciferous vegetables. The ability of four Lysobacter strains (L. antibioticus 6-B-1, L. antibioticus 6-T-4, L. antibioticus 13-B-1 and L. capsici ZST1-2) inhibited Plasmodiophora brassicae of resting spores and disease. Application of WBC of four Lysobacter strains inhibited clubroot disease, indicating that the disease suppression was due to antifungal compounds produced by the biocontrol bacterium in the culture. Development of clubroot on Chinese cabbage was inhibited when the WBC and SCA were applied before P. brassicae inoculation. Crude extract (Ce) of culture filtrate was effective in arresting the germination of resting spores of P. brassicae on slides. However, Lysobacter strains differed in their biocontrol effects, the strain L. capsci ZST1-2 recorded a high level of disease limiting effect.

Keywords: lysobacter strains; clubroot disease; biocontrol; lysobacter; four lysobacter

Journal Title: Indian Journal of Microbiology
Year Published: 2018

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