Vermicompost-based bioformulation for the management of sugarbeet root rot caused by
            <i>Sclerotium rolfsii</i>

Thilagavathi, R.; Rajendran, L.; Nakkeeran, S.; Raguchander, T.; Balakrishnan, A.; Samiyappan, R.

doi:10.1080/03235408.2012.724974

Cited by 14 publications

(6 citation statements)

References 16 publications

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“…The most important group was Pseudomonadales (Pseudomonas) , which harbors species that can inhibit pathogen growth, e.g. sugar beet root rot caused by Sclerotium rolfsii [Thilagavathi et al, 2012]. Pseudomonas fluorescens strain Pf1 in combination with either Trichoderma asperellum strain TTH1 or Bacillus subtilis strain EPCO-16 reduced the disease.…”

Section: Rapid Changes In the Bacterial Communities In The Storage Ofmentioning

confidence: 99%

Changes in the Bacterial Community Structure in Stored Wormbed Leachate

et al. 2014

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Organic wastes, such as cow manure, are often composted with earthworms (vermicomposting) while excess water is drained and collected. This wormbed leachate is nutrient-rich and it has been extensively used to fertilize plants. However, it is derived partially from a not yet finished compost process and could exhibit phytotoxicity or contain potentially hazardous microorganisms. The bacterial community in wormbed leachate derived from vermicomposting of cow manure was studied by pyrosequencing the 16S rRNA gene. The fresh wormbed leachate was rich in Mollicutes, particularly the genus Acholeplasma which contain phytopathogen species. The abundance of the Mollicutes decreased when the leachate was stored, while that of the Rhizobiales and the genus Pseudomonas increased. The bacterial communities changed rapidly in the leachate during storage. The changes in ammonium, nitrate and inorganic carbon content of the wormbed leachate when stored were correlated to changes in the bacterial community structure. It was found that storage of the wormbed leachate might be required before it can be applied to crops as large proportions of potentially plant pathogens were found in the fresh leachate.

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Section: Rapid Changes In the Bacterial Communities In The Storage Ofmentioning

confidence: 99%

Changes in the Bacterial Community Structure in Stored Wormbed Leachate

et al. 2014

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“…Application of single biocontrol agent can have limitations with regard to consistency and efficacy in different environments (Gumede, 2008). Several works suggest that combinations of biocontrol agents could be more effective in controlling soil-borne pathogens than a single agent (Pierson and Weller, 1994;Duffy et al, 1996;Singh et al, 1999;Domenech et al, 2006 andThilagavathi et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

Defense related enzyme induction in coconut by endophytic bacteria (EPC 5)

Rajendran¹,

Akila²,

Karthikeyan³

et al. 2015

Acta Phytopathologica et Entomologica Hungarica

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Endophytic bacteria Bacillus subtilis (EPC 5) was isolated and tested in vitro along with Pseudomonas fluorescens (Pf1) and the fungus Trichoderma viride (Tv1) against Ganoderma lucidum (Leys) Karst, the causal agent of basal stem rot on coconut palm. The endophytic bacterial strains namely EPC 5 and EPC 8 showed higher vigor index (germination percentage, root and shoot length) and more inhibition against G. lucidum over un-inoculated control. These strains were confirmed as Bacillus subtilis by biochemical tests, cloning and sequencing of internal transcribed spacer (ITS) region. The Bacillus subtilis (EPC 5) along with Pseudomonas fluorescens (Pf1) and Trichoderma viride (Tv1) has been tried as bioconsortia against basal stem rot disease under greenhouse conditions. The soil application of bioconsortia enriched with farm yard manure (FYM) enhanced the coconut saplings growth under greenhouse conditions and showed higher induction of defense related enzymes like peroxidase, polyphenol oxidase, phenylalanine ammonia lyase and phenols when challenged with pathogen.

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“…Strains of bacteria, such as Pseudomonas fluorescens Pf1 combined with Bacillus subtilis EPCO 16, play vital roles in suppressing fungal pathogens in vermicomposting. In addition, the fungal species Trichoderma asperellum TTH1 was also isolated from vermicompost and found to be more effective as a fungal biocontrol agent against sugar beet root rot than difenoconazole treatment [54]. Bacillus species are known to establish mutualistic relationships with earthworms and produce bioactive compounds against fungal pathogens in vermicompost [53].…”

Section: Vermiwash As Antifungal Agentmentioning

confidence: 99%

Vermicompost and Its Derivatives against Phytopathogenic Fungi in the Soil: A Review

et al. 2022

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Synthetic chemicals, such as fertilizers and pesticides, are abundantly used in agriculture to enhance soil fertility and prevent the occurrence of diseases, respectively. Many studies have reported a negative influence of these chemicals on the soil environment. Natural sources from earthworms and their products, as a result of vermicomposting, may be considered better alternatives. The aim of this review was to reveal the source of antifungal efficiency of vermicompost and its derivatives, such as vermiwash, coelomic fluid, skin secretion of earthworms, and metabolites from decomposer bacteria in vermicompost, in order to highlight their application in agriculture. The synergistic activity of bioactive compounds present in coelomic fluid, mucus, skin secretion, and metabolites from associated bacteria (decomposer) assisted crop plants for effective action against various soil pathogenic fungi, such as Rhizoctonia solani, Alternaria solani, Aspergillus niger, A. flavus, Fusarium oxysporum, and F. graminearum. Thus, these bioactive metabolites can be recommended to suppress plant fungal diseases. Vermicompost and its derivatives should be considered for use in agricultural fields to control harmful soil fungi and increase crop productivity.

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Vermicompost-based bioformulation for the management of sugarbeet root rot caused by Sclerotium rolfsii

Cited by 14 publications

References 16 publications

Changes in the Bacterial Community Structure in Stored Wormbed Leachate

Changes in the Bacterial Community Structure in Stored Wormbed Leachate

Defense related enzyme induction in coconut by endophytic bacteria (EPC 5)

Vermicompost and Its Derivatives against Phytopathogenic Fungi in the Soil: A Review

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