Pathogenic Variability of Isolates of Rhizoctonia solani  of Different Agricultural Crops

Debbarma, Manashi; Dutta, Pranab

doi:10.20546/ijcmas.2021.1001.094

Cited by 3 publications

(3 citation statements)

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“…Different fungal pathogens isolated from each of leaf, stem, and root tissues of the different seedling species is an indication that the disease symptoms observed are not caused by a single pathogen and therefore disease complexes could occur in the nursery if effective disease management strategies are not undertaken. Rhizoctonia is a soil-borne pathogen but was the dominant fungal pathogen isolated from all the leaves of the seedling species and therefore could be inferred that it is the major pathogen contributing to the blight disease in the nursery [18]. This inference is in agreement with TSS [19] and Shivanna [20] who identified Rhizoctonia leaf blight of Cassia fistula and Bauhinia variegata.…”

Section: Fungal Disease Pathogens Identified In the Tamale Central Fo...supporting

confidence: 75%

Incidence and severity of fungal seedling diseases in Tamale central forest nursery, Ghana

Prince Cobbinah,

Joseph Ndakpe Tindamdo,

Ammal Abukari

et al. 2023

Int. J. Sci. Res. Arch.

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Fungal diseases cause serious seedling mortality in nurseries and threaten future seedling production for forest regeneration. To abate this menace, knowledge about them is key. Therefore, this study aimed at determining the incidence and severity of fungal diseases of forest seedlings in the Central Forest Nursery of Tamale, Ghana. Khaya senegalensis, Tectona grandis and Polyalthia longifolia in the nursery were infected with eight fungal pathogens and an unidentified fungus causing leaf blight, wilt, and dumping-off diseases. The pathogens included Rhizoctonia sp., Fusarium sp., Corrynespora sp., Colletotrichum sp., Cercospora sp., Phytophthora sp., Chaetomium sp., and Macrophomina sp. Rhizoctonia was the dominant pathogen isolated from all the leaves of the seedling species. Colletotrichum and Chaetomium were isolated from the leaves of Polyalthia longifolia. Cercospora and an unidentified spp. were found on the stems of Tectona grandis. Fusarium and Phytophthora were respectively found on Polyalthia longifolia and Khaya senegalensis stems. Chaetomium was identified on both Polyalthia longifolia and Khaya senegalensis stems. Cercospora and Fusarium were isolated from the roots of Tectona grandis and Polyalthia longifolia respectively while Macrophomina was associated with both Tectona grandis and Khaya senegalensis roots. Leaf blight recorded the highest disease incidence (76.7%) and affected all the three seedling species. Wilt disease showed low incidence (10.2-15.8 %) among the different seedling species. Dumping-off disease incidence (10.4%) was only recorded in Khaya senegalensis. The severities of the diseases identified were low (1-2) score except leaf blight of Tectona grandis and Polyalthia longifolia recording a moderate (3.0) severity score. It is recommended that appropriate disease management strategies be employed to prevent high incidences and severities.

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Section: Fungal Disease Pathogens Identified In the Tamale Central Fo...supporting

confidence: 75%

Incidence and severity of fungal seedling diseases in Tamale central forest nursery, Ghana

Prince Cobbinah,

Joseph Ndakpe Tindamdo,

Ammal Abukari

et al. 2023

Int. J. Sci. Res. Arch.

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“…Then, they were left for 1 week for evaporation of formalin in open air. Each pot containing its soil was infected with fungal propagules suspension (5mL /Kg soil) by thoroughly mixed with soil according to Manashi and Dutta [ 60 ]. The pots were wetted daily for 7 days to allow growth of the experimental fungus.…”

Section: Methodsmentioning

confidence: 99%

Enhancing Vicia faba’s immunity against Rhizoctonia solani root rot diseases by arbuscular mycorrhizal fungi and nano chitosan

El-Gazzar,

El-Hai,

Teama

et al. 2023

BMC Plant Biol

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Background The spreading of root rot disease of faba bean plant (Vichia faba L, VF) in Egypt is still of great challenge faced researchers since VF is an important legume in Egypt, because their seeds are used for human feeding. Fungicides are used for treatment of either seeds or soil; unfortunately they cause environmental pollution. Therefore, there is a need to continue research to find out safe natural solutions. In this regard, Arbuscular mycorrhizal fungi (AMF) and chitosan (micro or nanoform) were used as an inhibitory product against Rhizoctonia solani OM918223 (R.solani) either singly or in combinations. Results The results employed herein have exhibited that R.solani caused root rot disease of VF plants in more than 80% of the plants under investigation. Chitosan nanoparticles (Chitosan NPs) were prepared by ionic gelatin method and characterized by using dynamic light scattering (DLS), transmission electron microscopy (TEM) imaging and Fourier transform infra-red (FTIR). Chitosan NPs are spherical with a diameter of 78.5 nm and exhibited the presence of different functional groups. The inhibitory natural products against R.solani were arranged according to their ability to inhibit the pathogen used in the following descending manner; combination of AMF with Chitosan NPs, AMF with micro chitosan and single AMF, respectively. Where, Chitosan NPs showed a potent influence on R.solani pathogen and reduced the pre-and post-emergence of R. solani. In addition, Chitosan NPs reduced Disease Incidence (DI %) and Disease Severity (DS %) of root rot disease and are widely functional through mixing with AMF by about 88% and 89%. Further, Chitosan NPs and micro chitosan were proved to increase the growth parameters of VF plants such as nutritional status (mineral, soluble sugar, and pigment content), and defense mechanisms including total phenol, peroxidase, and polyphenol oxidase in mycorrhizal plants more than non-mycorrhizal one either in infected or healthy plants. Moreover, activity of AMF as an inhibitory against R.solani and improvement natural agent for VF growth parameters was enhanced through its fusing with Chitosan NPs. Conclusions The use of AMF and Chitosan NPs increased faba bean plant resistance against the infection of root rot R. solani, with both prevention and cure together. Therefore, this research opens the door to choose natural and environmental friendly treatments with different mechanisms of plant resistance to disease.

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“…1). Debbarma and Dutta [16] observed various morphological characters of Rhizoctonia solani from different hosts of Assam region. Spedaletti et al [7] identified R. solani based on the morphological characteristics viz., mycelium color, sclerotia formation, and nuclei count per hyphal cell.…”

Section: Morphological Identification Rhizoctonia Solani Kuhnmentioning

confidence: 99%

Morphological, Molecular Identification and Pathogenicity of Rhizoctonia solani Kuhn: A Seed and Soil Borne Pathogen Infecting French Bean

Smitha H. S.,

Prashantha A.,

Koulagi

et al. 2023

IJECC

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French bean (Phaseolus vulgaris L.), holds significant importance as a both vegetable and pulse crop in India. Root rot disease has become threat for successful french bean cultivation. Fusarium spp., Sclerotium rolfsii, Rhizoctonia sp., Macrophomina, Pythium spp. and Thielaviopsis sp. may incite root rot disease in french bean. The root rot caused by Rhizoctonia soalni Kuhn is one among the root rot causing pathogens, is a major devasticating disease in this crop. The objective of this investigation was to perform the morphological, molecular identification and pathogenicity of R. solani Kuhn infecting french bean root rot. The pathogen was isolated from the naturally infected french bean field with characteristic symptoms like yellowing, drying at the soil level, stunting, poor seedling establishment, uneven growth, chlorosis, and premature defoliation in severely affected cases. It was isolated using standard tissue isolation technique and identified based on morphological traits. The fungus was molecular identified by sequencing ITS region of rDNA by using ITS1 and ITS4 primers. Further, pathogenicity of R. solani was proved according to Koch’s postulates.

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Pathogenic Variability of Isolates of Rhizoctonia solani of Different Agricultural Crops

Cited by 3 publications

References 10 publications

Incidence and severity of fungal seedling diseases in Tamale central forest nursery, Ghana

Incidence and severity of fungal seedling diseases in Tamale central forest nursery, Ghana

Enhancing Vicia faba’s immunity against Rhizoctonia solani root rot diseases by arbuscular mycorrhizal fungi and nano chitosan

Morphological, Molecular Identification and Pathogenicity of Rhizoctonia solani Kuhn: A Seed and Soil Borne Pathogen Infecting French Bean

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