First report of Thielaviopsis paradoxa causing stem rot in Dracaena marginata in Brazil

Santos, Á. F. dos; Inácio, C. A.; Guedes, Milton Vasconcelos; Tomaz, Roberto

doi:10.1590/s0100-54052012000400016

Cited by 6 publications

(2 citation statements)

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“…To elucidate the nature and pathogenicity of the potential pathogen, we inoculated tissue-cultured greenhouse-grown date palm plants with the three isolates of the pathogen. Our data were very similar to the data obtained from previous pathogenicity studies of T. paradoxa on Dracaena marginata [ 35 ], Butia capitate [ 36 ], Hyophorbe lagenicaulis [ 37 ], and Cocos nucifera [ 38 ]. Hence, based upon the morphology and sporulation characteristics, it is difficult to distinguish both Thielaviopsis spp., and a DNA-based molecular characterization of the most conserved regions of these fungal pathogens can be an alternative species-specific detection method for black scorch disease in date palm.…”

Section: Discussionsupporting

confidence: 90%

Characterization and Control of Thielaviopsis punctulata on Date Palm in Saudi Arabia

Alhudaib

El-Ganainy

Almaghasla

et al. 2022

Plants

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Date palm (Phoenix dactylifera L.) is the most important edible fruit crop in Saudi Arabia. Date palm cultivation and productivity are severely affected by various fungal diseases in date palm-producing countries. In recent years, black scorch disease has emerged as a devastating disease affecting date palm cultivation in the Arabian Peninsula. In the current survey, leaves and root samples were collected from deteriorated date palm trees showing variable symptoms of neck bending, leaf drying, tissue necrosis, wilting, and mortality of the entire tree in the Al-Ahsa region of Saudi Arabia. During microscopic examination, the fungus isolates growing on potato dextrose agar (PDA) media produced thick-walled chlamydospores and endoconidia. The morphological characterization confirmed the presence of Thielaviopsis punctulata in the date palm plant samples as the potential agent of black scorch disease. The results were further confirmed by polymerase chain reaction (PCR), sequencing, and phylogenetic dendrograms of partial regions of the ITS, TEF1-α, and β-tubulin genes. The nucleotide sequence comparison showed that the T. punctulata isolates were 99.9–100% identical to each other and to the T. punctulata isolate identified from Iraq-infecting date palm trees. The pathogenicity of the three selected T. punctulata isolates was also confirmed on date palm plants of Khalas cultivar. The morphological, molecular, and pathogenicity results confirmed that T. punctulata causes black scorch disease in symptomatic date palm plants in Saudi Arabia. Furthermore, seven commercially available fungicides were also tested for their potential efficacy to control black scorch disease. The in vitro application of the three fungicides Aliette, Score, and Tachigazole reduced the fungal growth zone by 86–100%, respectively, whereas the in vivo studies determined that the fungicides Aliette and Score significantly impeded the mycelial progression of T. punctulata with 40% and 73% efficiency, respectively. These fungicides can be used in integrated disease management (IDM) strategies to curb black scorch disease.

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Section: Discussionsupporting

confidence: 90%

Characterization and Control of Thielaviopsis punctulata on Date Palm in Saudi Arabia

Alhudaib

El-Ganainy

Almaghasla

et al. 2022

Plants

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“…The Dracaena genus has several species, such as D. marginata, D. braunii, and D. americana. Thielaviopsis paradoxa causing stem rot of D. marginata has been reported from Brazil (Santos et al 2012). It was found by Zaher et al (2005), that all isolates of Corynespora cassiicola were pathogenic to D. marginata in Egypt.…”

Section: Discussionmentioning

confidence: 97%

First report of Fusarium solani causing stem rot of Dracaena in Iran

Alizadeh¹,

Zafari²,

Sadeghi³

2016

Journal of Plant Protection Research

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In July 2013, symptoms of stem rot were observed in the Dracaena sanderiana cuttings in greenhouses of Mahallat County, Markazi Province, Iran. The symptoms first appeared as severe wilting. Later, leaves became brown and necrotic. Symptoms on the cuttings were observed as rotted areas on the middle of the stems. The cortical tissues of the plants showed a distinct brown discoloration. Eventually, the infected plants died. The pathogen was isolated from Dracaena stems and identified as F. solani by a fragment of the translation elongation factor 1-alpha (EF-1α) gene. Fusarium solani was confirmed by a pathogenicity test, and the causal agent was re-isolated from infected D. sanderiana plants. To the best of our knowledge, this is the first report of stem rot caused by F. solani on the cuttings of D. sanderiana.

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Fusarium solani causing stem rot and wilt of lucky Bamboo (Dracaena sanderiana) in India-first record

Kumar

Dubey

Kumar

et al. 2019

Indian Phytopathology

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First report of Thielaviopsis paradoxa causing stem rot in Dracaena marginata in Brazil

Cited by 6 publications

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Characterization and Control of Thielaviopsis punctulata on Date Palm in Saudi Arabia

Characterization and Control of Thielaviopsis punctulata on Date Palm in Saudi Arabia

First report of Fusarium solani causing stem rot of Dracaena in Iran

Fusarium solani causing stem rot and wilt of lucky Bamboo (Dracaena sanderiana) in India-first record

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