Pathogenicity Test and Anastomosis Group of Rhizoctonia solani the Causal Organism of Stem Canker and Black Scurf Disease of Potato in Egypt

Abdel-Sattar, Mahmoud; El-Marzouky, Hanan; Ibrahim, Usama

doi:10.21608/japp.2017.7494

Cited by 8 publications

(7 citation statements)

References 27 publications

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“…4). This result agrees with the findings of Abdel-Sattar et al, (2017). The sequence of the isolates was submitted to the National Center for Biotechnology Information (NCBI), GenBank and gave accession numbers (MZ267232, MZ267234 and MZ267689), respectively.…”

Section: -supporting

confidence: 90%

“…Rhizoctonia isolates differed among themselves in severity of the infection, although similar conditions, this is an indication of the role in different virulence (Rubio et al, 1996). Abdel-Sattar et al, (2017) stated that virulence of isolates in pathogenicity attributed to the difference between R. solani Anastomosis groups (AGs).…”

Section: -Virulence Evaluation Of R Solani Isolatesmentioning

confidence: 99%

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The Competitive Potential of Different Trichoderma spp. to Control Rhizoctonia Root Rot Disease of Pepper (Capsicum annuum L.)

Ali

2021

Egyptian Journal of Phytopathology

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Five isolates of Trichoderma spp. were investigated, in a preliminary study, for their efficiency in controlling Rhizoctonia root rot of pepper (Capsicum annuum L.). GC-MS analysis of most active Trichoderma spp. extracted secondary metabolites were studied. The major compounds identified by GC-MS analysis included hexadecanol, nonadecene, 1,2-benzenedicarboxylic acid, octadecenoic acid (z) and hexadecanol, 2-methyl. These compounds have been found to play an important role in controlling plant diseases. The results of antagonistic activity of three isolates proved higher efficiency in controlling R. solani. Browning of the R. solani mycelium was observed where mycoparasitism occurred. The parasitism of R. solani hyphal cells by Trichoderma harzianum was studied by light and scanning electron microscopy. Sequence data of R. solani isolates (R.1, R.2 and R.4) have been submitted to the GenBank under accession numbers (MZ267232, MZ267234 and MZ267689), respectively. The most effective isolates i.e., T. asperellum, T. hamatum and T. harzianum in addition to their mixture were formulated in different forms i.e., suspension and powder, then tested at different concentrations under the greenhouse and protected cultivation conditions. Results of greenhouse studies indicated that all isolates and their mixture were effective in controlling pepper root rot disease and increasing percentage of survived plants. Moreover, results showed that suspension was effective than powder in reducing the disease. Higher bio-control efficiency at protected cultivation was obtained when the mixture of isolates was used at high concentration. Most of the Trichoderma spp. studied in the present work have been able to reduce severity of R. solani.

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Section: -supporting

confidence: 90%

Section: -Virulence Evaluation Of R Solani Isolatesmentioning

confidence: 99%

The Competitive Potential of Different Trichoderma spp. to Control Rhizoctonia Root Rot Disease of Pepper (Capsicum annuum L.)

Ali

2021

Egyptian Journal of Phytopathology

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“…Pathogenicity test of 12 isolates showed significant differences between isolates where RS7 was the most virulent isolate in the development of the stem canker and black scurf disease on potato cv. 'Spunta' in Egypt (Abdel-Sattar et al, 2017). R. solani isolates, even under similar conditions, showed significant differences in infection severity and induced symptoms, suggesting the involvement of genetic factors in virulence differences (Rubio et al, 1996).…”

Section: Preliminary Pathogenicity Testmentioning

confidence: 95%

“…R. solani isolates, even under similar conditions, showed significant differences in infection severity and induced symptoms, suggesting the involvement of genetic factors in virulence differences (Rubio et al, 1996). Variance of isolates in pathogenicity was also attributed to difference between (AGs) where R. solani AGs, other than AG3, usually have low virulence against potato (Balkana and Wenham, 1973;Yanar et al, 2005;Khandaker et al, 2011;Abdel-Sattar et al, 2017). Jaradat et al (2023) showed that R. solani AG-3PT was the primary pathogen associated with potato stem canker and black scurf diseases in Jordan.…”

Section: Preliminary Pathogenicity Testmentioning

confidence: 99%

Testing the Susceptibility of Some Potato Cultivars to Black Scurf Disease Caused by Rhizoctonia solani Kühn

2024

JJBS

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Rhizoctonia stem canker and black scurf are among the most important diseases associated with potato (Solanum tuberosum L.) cultivation worldwide. Pathogenicity test of 19 isolates of Rhizoctonia solani Kühn obtained from four governorates in Syria revealed that isolates varied in their ability to cause disease with the isolate Rh15 being the most virulent in the development of the disease on potato plant under artificial infection. The relative susceptibility of seven commercial and local potato cultivars against R. solani was tested. The evaluation was based on black scurf severity and the negative impact of the disease on plant growth and expected effect on yield. The tested cultivars showed variable degrees of black scurf severity and consequent plant growth, but no completely immune cultivars were observed. Based on disease index (DI), potato varieties 'Agria', 'Ultra' and 'Labella' were highly susceptible to the disease; 'Spunta' was moderately resistant whereas 'Everest' was the most tolerant. Infection of the most susceptible cultivar "Afamia" resulted in the death of a large number of seedlings, large and deep canker on stems, with no formation of new tubers. Although 'Synergy' was moderately susceptible, and the black scurf incidence was higher than that of 'Everest' and 'Spunta', the loss of tubers weight was not significant compared to the previous two cultivars. The results suggested that use of tolerant and moderately resistant cultivars in Syria may help in reducing the development of black scurf on potatoes.

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Section: Preliminary Pathogenicity Testmentioning

confidence: 99%

Untitled

2023

JJBS

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Study areas include cell biology, genomics, microbiology, immunology, molecular biology, biochemistry, embryology, immunogenetics, cell and tissue culture, molecular ecology, genetic engineering and biological engineering, bioremediation and biodegradation, bioinformatics, biotechnology regulations, gene therapy, organismal biology, microbial and environmental biotechnology, marine sciences. The JJBS welcomes the submission of manuscript that meets the general criteria of significance and academic excellence. All articles published in JJBS are peerreviewed. Papers will be published approximately one to two months after acceptance.

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Pathogenicity Test and Anastomosis Group of Rhizoctonia solani the Causal Organism of Stem Canker and Black Scurf Disease of Potato in Egypt

Cited by 8 publications

References 27 publications

The Competitive Potential of Different Trichoderma spp. to Control Rhizoctonia Root Rot Disease of Pepper (Capsicum annuum L.)

The Competitive Potential of Different Trichoderma spp. to Control Rhizoctonia Root Rot Disease of Pepper (Capsicum annuum L.)

Testing the Susceptibility of Some Potato Cultivars to Black Scurf Disease Caused by Rhizoctonia solani Kühn

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