Pathological Studies on Fungal Diseases of Date Palm in New Valley Governorate

El-Morsi, Magd; Rehab, Mohsen Abo; Abd-Elmalek, Jehan

doi:10.21608/ejp.2012.105286

Cited by 2 publications

(5 citation statements)

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“…divided isolates of Fusarium oxysporum into four clades Bryant and Moulton (2004);Dara et al (2023) Fusarium oxysporum, frequently isolated from symptomatic date palm tissues, was used for pathogenicity confirmation, and it fulfilled all steps of Koch's postulates. The study proved F. oxysporum, a pathogen causing wilt on date palm in Pakistan, and endorsed the findings of Louvet and Toutain (1981); Plyler et al (2000); Hernandez-Hernandez et al (2010);El-Morsi et al (2012), who also reported the same pathogen of this disease on date palms. However, the Etiology established in this study contradicts Maitlo et al (2009); Matlo et al (2021), who reported F. solani as a potential pathogen.…”

Section: Lesion Size (Cm)supporting

confidence: 88%

“…This study revealed that disease is now prevailing in all the areas where the date palm has been growing across the country. The characteristic symptoms observed include chlorosis, one-sided yellowing, fronds killing, brown-colored stripes on the dorsal side of rachis, strikes on vascular bundles, and red discoloration on the roots, and these wilt disease symptoms were very similar to the typical symptoms of Fusarium wilt described by the other pathologists from various parts of the world (Maitlo et al 2009;Abdalla et al 2010;Abul-Soad, 2011;El-Morsi et al 2012 andNaheed et al 2023) Various species of Fusarium can cause wilts, i.e., F. solani, F. eumartii, F. avenaceum, F. tabacinum, and F. sulphureum, but F. oxysporum is mainly involved in causing wilts in a wide variety of important crops (Beckman 1987;Okungbowa and Shittu, 2012). This fungus comprises several important pathogenic and nonpathogenic species (Shishido et al, 2005).…”

Section: Discussionsupporting

confidence: 58%

“…The mainly reported Fusarium spp causing wilt on date palm in the literature are F. oxysporum, F. solani, F. Proliferatum (Louvet and Toutain, 1981;Abdelhafez et al, 1990;Khodair et al, 1991;El-Abyad et al,1993;Abbas and Mandeel, 1995;Mandeel et al, 1995;Sangalang et al, 1995;Mandeel et al,2005;Maitlo et al,2009;Cohen et al, 2010;Jansson et al, 2010;El-Morsi et al,2012).…”

Section: Discussionmentioning

confidence: 99%

“…Wilt symptoms: A wide range of symptoms was carefully observed on wilted date palms. The typical wilt symptoms were seen on rachis, leaflets, vascular bundles, and roots (Maitlo et al, 2009;Abdalla et al, 2010;Abul-Soad, 2011;El-Morsi et al, 2012).…”

Section: Methods 2 (Soil)mentioning

confidence: 99%

“…Three provinces 1). Wilted date palms were thoroughly observed following the symptoms explained by (Maitlo et al 2009;Abdalla et al, 2010;Abul-Soad, 2011;El-Morsi et al, 2012), and data regarding disease incidence and severity was documented by quantitative method. Disease incidence was computed using the following mentioned formula: Disease incidence = 𝑁𝑜.𝑜𝑓 𝑑𝑖𝑠𝑒𝑎𝑠𝑒𝑑 𝑝𝑙𝑎𝑛𝑡𝑠 𝑁𝑜.𝑜𝑓 𝑑𝑖𝑠𝑒𝑎𝑠𝑒𝑑 𝑝𝑙𝑎𝑛𝑡𝑠 × 100…”

Section: Survey and Disease Documentationmentioning

confidence: 99%

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Traditional pathology and phylogenetic networking confirm the pathogen causing date palm wilt

Khan

2023

PAKJAS

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Phoenix dactylifera L. (Date palm) is one of the leading perennial fruit crops regarding its nutritional profile, medicinal significance, excellent yields, long life, and high adaptability to diverse climatic conditions of semi-arid and arid regions globally. Eleven major palm-growing districts of Punjab, Sindh, and Khyber Pakhtunkhwa were surveyed for wilt disease assessment on date palms. The date palm plantation was highly affected with Fusarium wilt diseases with 55%, the incidence in Khairpur (Sindh province), followed by Bahawalpur 47.4% (Punjab Province) and 45% in Dera Ismail Khan (KPK province). Disease severity was recorded as 65% in Khairpur, 55% in Bahawalpur, 50% in Dera Ismail Khan (Sindh, Punjab, and KPK, respectively). Sixty-three Fusarium isolates were obtained from three hundred and eighty (380) diseased samples, and thirty isolates randomly selected out of 63 were studied for morpho-cultural and microscopic characterization. Morpho-cultural characters i.e colony pigmentation, growth pattern, conidia (macro and microconidia), shape, apical cell shape, and phalidies studied were coinciding with typical characters of Fusarium oxysporum. Twenty isolates of Fusarium population was subjected for the ITS region sequence data-based phylogenetic network. The Neighbor net algorithm computed an unrooted phylogenetic network displayed as four branched genetic-network that depicted the division of twenty fungal isolates into four groups. F. oxysporum (FMB-FO-PD-011) inoculated onto healthy symptomless detached date palm leaves, seedlings and suckers under controlled as well as field conditions showed typical wilt disease symptoms. Hence this study proved that F. oxysporum is the potential cause of date palm wilt in Pakistan.

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Section: Lesion Size (Cm)supporting

confidence: 88%

Section: Discussionsupporting

confidence: 58%

Section: Discussionmentioning

confidence: 99%

Section: Methods 2 (Soil)mentioning

confidence: 99%

Section: Survey and Disease Documentationmentioning

confidence: 99%

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Traditional pathology and phylogenetic networking confirm the pathogen causing date palm wilt

Khan

2023

PAKJAS

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Pathological Characterization and Management of Lasiodiplodia theobromae, a Hemibiotroph with an Interkingdom Host Range

Atallah,

Hassanin,

Yassin

et al. 2024

Plant Disease

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Heart rot disease, caused by Lasiodiplodia theobromae, is destructive for date palms and other woody plants. The disease was reported in several oasis in Egypt, and the pathogen was found in association with infected trees suffering die-back and rachis blight. Seven phylogenetically distinct fungal isolates were selected, and their pathogenicity was confirmed on date palms. The isolates exhibited variable degrees of virulence on inoculated leaves, which confirms the variation. We examined the antifungal effect of microbial bioagents and plant extracts on heart rot disease. The isolates of Trichoderma spp. gave moderate reduction of the pathogen’s linear growth (40-60%), while their exudates were ultimately ineffective. Bacillus spp. isolates, except for B. megaterium, were more effective against spore germination as they gave 80-90% reduction on average. Among the examined plant extracts garlic sap gave 98.67% reduction of linear growth followed by artemisia (15.5%) and camphor (24.8%). The extraction methods greatly influenced the antifungal efficiency of each extract as exposure to organic solvents significantly decreased the efficiency of all extracts, while hot water extraction negatively affected garlic sap only. Successful bioagents and plant extracts were further assayed for the suppression of heart rot disease on date palms. Both T. album and T. harzianum gave comparable degrees of suppression as by commercial fungicides. In addition, treatment before or during pathogen inoculation was the most effective as it significantly enhanced the expression of defense-related enzymes. Our findings suggest bio-pesticides possessing a dual role in disease suppression and defense boosters for date palms suffering heart rot disease.

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Pathological Studies on Fungal Diseases of Date Palm in New Valley Governorate

Cited by 2 publications

References 1 publication

Traditional pathology and phylogenetic networking confirm the pathogen causing date palm wilt

Traditional pathology and phylogenetic networking confirm the pathogen causing date palm wilt

Pathological Characterization and Management of Lasiodiplodia theobromae, a Hemibiotroph with an Interkingdom Host Range

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