Incidence of the Two Date Palm Pathogens, Thielaviopsis Paradoxa and T. Punctulata in Soil From Date Palm Plantations in Elx, South-East Spain

Abdullah, Samir K.; Asensio, L.; Monfort, Elena; Gómez-Vidal, Sonia; Salinas, J.; Lorca, Luis V. Lopez; Jansson, Hans

doi:10.2478/v10045-009-0043-z

Cited by 20 publications

(12 citation statements)

References 12 publications

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“…paradoxa produces aleurioconidia in chains, whereas Ch. punctulata has aleurioconidia borne singly (Abdullah et al 2009;Al-Ani 1958;Paulin-Mahady et al 2002;Suleman et al 2001). Measurements of endoconidia and aleurioconidia revealed that our dimensions are similar to the ranges reported by Suleman et al (2001) and Polizzi et al (2007).…”

Section: Discussionsupporting

confidence: 86%

First report of Chalaropsis punctulata on date palm in Egypt, comparison with other Ceratocystis anamorphs and evaluation of its biological control

Ammar

2011

Phytoparasitica

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Morphological studies of Chalaropsis punctulata and Thielaviopsis paradoxa revealed that the two fungi are similar to each other and produce endoconidia from phialidic conidiophores and thick dark-walled and pigmented aleuroconidia from conidiophores. There are minor morphological characters which separate the fungus Ch. punctulata from T. paradoxa: the latter form aleuroconidia in chains at the tip of specialized hyphae, whereas the former produce aleuroconidia singly. The percent inhibition of mycelial growth and the total count of conidia showed good inhibitory effects in all biocontrol methods used. The antagonist activity of Trichoderma harzianum against Ch. punctulata was due mainly to coil formation and hyphae grew alongside of the pathogen hyphae. Both hyphae and conidia of Ch. punctulata were malformed and swelled abnormally in the case of Bacillus isolates. This is the first report of Ch. punctulata on date palm in Egypt.

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Section: Discussionsupporting

confidence: 86%

First report of Chalaropsis punctulata on date palm in Egypt, comparison with other Ceratocystis anamorphs and evaluation of its biological control

Ammar

2011

Phytoparasitica

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“…Although several fungi have been recorded as causal pathogens of SDS on date palm worldwide [ 9 , 21 , 34 , 35 ], many of these studies have reported the isolation of Fusarium spp. from roots, fronds, and trunks of date palm trees showing wilt and decline [ 21 , 22 ].…”

Section: Discussionmentioning

confidence: 99%

Molecular Identification and Disease Management of Date Palm Sudden Decline Syndrome in the United Arab Emirates

Alwahshi

Saeed

Sham

et al. 2019

IJMS

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Date palm orchards suffer from serious diseases, including sudden decline syndrome (SDS). External symptoms were characterized by whitening on one side of the rachis, progressing from the base to the apex of the leaf until the whole leaf dies; while the internal disease symptoms included reddish roots and highly colored vascular bundles causing wilting and death of the tree. Although three Fusarium spp. (F. oxysporum, F. proliferatum and F. solani) were isolated from diseased root samples, the fungal pathogen F. solani was associated with SDS on date palm in the United Arab Emirates (UAE). Fusarium spp. were identified based on their cultural and morphological characteristics. The internal transcribed spacer regions and large subunit of the ribosomal RNA (ITS/LSU rRNA) gene complex of the pathogens was further sequenced. Pathogenicity assays and disease severity indices confirm the main causal agent of SDS on date palm in the UAE is F. solani. Application of Cidely® Top (difenoconazole and cyflufenamid) significantly inhibited the fungal mycelial growth in vitro and reduced SDS development on date palm seedlings pre-inoculated with F. solani under greenhouse conditions. This is the first report confirming that the chemical fungicide Cidely® Top is strongly effective against SDS on date palm.

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“…2 ). Most of these fungi occur on monocotyledenous plants including palms, pineapple and banana and some are important plant pathogens ( Mitchell 1937, Bliss 1941, Abdullah et al. 2009 ).…”

Section: Discussionmentioning

confidence: 99%

Redefining Ceratocystis and allied genera

Beer

Duong

Barnes

et al. 2014

Studies in Mycology

203

244

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The genus Ceratocystis was established in 1890 and accommodates many important fungi. These include serious plant pathogens, significant insect symbionts and agents of timber degradation that result in substantial economic losses. Virtually since its type was described from sweet potatoes, the taxonomy of Ceratocystis has been confused and vigorously debated. In recent years, particulary during the last two decades, it has become very obvious that this genus includes a wide diversity of very different fungi. These have been roughly lumped together due to their similar morphological structures that have clearly evolved through convergent evolution linked to an insect-associated ecology. As has been true for many other groups of fungi, the emergence of DNA-based sequence data and associated phylogenetic inferences, have made it possible to robustly support very distinct boundaries defined by morphological characters and ecological differences. In this study, DNA-sequence data for three carefully selected gene regions (60S, LSU, MCM7) were generated for 79 species residing in the aggregate genus Ceratocystis sensu lato and these data were subjected to rigorous phylogenetic analyses. The results made it possible to distinguish seven major groups for which generic names have been chosen and descriptions either provided or emended. The emended genera included Ceratocystis sensu stricto, Chalaropsis, Endoconidiophora, Thielaviopsis, and Ambrosiella, while two new genera, Davidsoniella and Huntiella, were described. In total, 30 new combinations have been made. This major revision of the generic boundaries in the Ceratocystidaceae will simplify future treatments and work with an important group of fungi including distantly related species illogically aggregated under a single name.

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Incidence of the Two Date Palm Pathogens, Thielaviopsis Paradoxa and T. Punctulata in Soil From Date Palm Plantations in Elx, South-East Spain

Cited by 20 publications

References 12 publications

First report of Chalaropsis punctulata on date palm in Egypt, comparison with other Ceratocystis anamorphs and evaluation of its biological control

First report of Chalaropsis punctulata on date palm in Egypt, comparison with other Ceratocystis anamorphs and evaluation of its biological control

Molecular Identification and Disease Management of Date Palm Sudden Decline Syndrome in the United Arab Emirates

Redefining Ceratocystis and allied genera

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