Browsing by Author "Özer, Göksel"

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Antifungal effect of boron compounds against Neoscytalidium dimiatum
(2023) Derviş, Sibel; Türkkan, Muharrem; Yiğit, Abdurrahman; Derviş, Sibel; Özer, Göksel; Erper, İsmail
Neoscytalidium dimidiatum has been recently identified as the agent responsible for canker, dieback, shoot blight, and root rot on different hosts in Türkiye. In this study, we evaluated the inhibitory effect of boric acid (H3BO3), three borates [disodium octaborate tetrahydrate (Na2B8O13.4H2O), disodium tetraborate decahydrate (Na2B4O7.10H2O) and disodium tetraborate (Na2B4O7)] on the mycelial growth, germ tube elongation and conidial germination of N. dimidiatum. The antifungal effects of the boron compounds were investigated at 0.125, 0.25, 0.5, 1.0 and 2.0% (w/v) concentrations. The differences observed between the inhibitory effects of boron compounds on the parameters were found to be significantly important at P < 0.05. The 0.5% concentration of disodium tetraborate decahydrate and disodium octaborate tetrahydrate completely inhibited the fungus, whereas other salts did not. Disodium tetraborate decahydrate and disodium octaborate tetrahydrate completely inhibited three parameters at 0.5% and higher concentrations. However, boric acid and disodium tetraborate were able to completely inhibit investigated factors of N. dimidiatum at 2.0% and 1.0% concentration, respectively. Disodium tetraborate and boric acid at 0.5% concentration decreased germ tube elongation and conidia germination of the fungus by 94.97%-63.57%, 59.33%-51.26%, respectively. The effectiveness of the 0.5% concentration on conidial germination was also similar in both salts at P < 0.05. However, disodium tetraborate inhibited germ tube elongation more effectively than boric acid. The minimum inhibition concentration (MIC) values of the four boron compounds also varied between 0.5% and 2.0% concentrations. The boron compounds in this study could be potential agents to manage N. dimidiatum.
Bipolaris sorokiniana associated with common root rot in Azerbaijan and Kazakhstan
(2022) Derviş, Sibel; Bozoğlu, Tuğba; Derviş, Sibel; Paulitz,Timothy C.; Özdemir, Fatih; Morgounov, Alexey; Mumınjanov,Hafiz; Amer, Mohammed; Imren, Mustafa; Dababat, Abdelfattah A.; Özer, Göksel
Wheat (Triticum spp.) is the third most important crop in terms of global production, with an average annual production of almost 219 million ha and yielding 760.9 million tons, after maize and rice. However, A complex of fungi attacking the crown and root tissues of wheat causes a serious problem and significant yield reductions in wheat. Although most prevailing species in this complex can change yearly and regionally in dryland winter wheat production areas, Bipolaris sorokiniana Shoemaker (teleomorph: Cochliobolus sativus) is one of the dominant species and causes spot blotch and common root rot (CRR) on wheat plants, especially in winter wheat varieties. Comprehensive surveys were conducted to identify B. sorokiniana associated with CRR of wheat throughout the main wheat-growing areas of Azerbaijan and Kazakhstan in 2017 and 2019, respectively. As a result of the classification of species based on morphological and molecular tools, 96 and 547 isolates were identified as B. sorokiniana for Azerbaijan and Kazakhstan, respectively. All surveyed regions for these countries were contaminated with this pathogen. Some representative isolates of B. sorokiniana were tested for their ability to cause disease and produced moderate disease severities on cultivar Seri 82 (Triticum aestivum, bread wheat). The percent incidence of B. sorokiniana isolates in all isolates was 15.2% for Azerbaijan, whereas, for Kazakhstan, B. sorokiniana was the most frequently recovered species in the three regions surveyed, with an isolated frequency of 44.80%. The results of the current study provide crucial and helpful information to improve disease management strategies against CRR of wheat in these countries.
Canker and leaf scorch on olive (Olea europaea L.) caused by Neoscytalidium dimidiatum in Turkey
(ScienceDirect, 2022) Derviş, Sibel; Özer, Göksel; Türkölmez, Şahimerdan; Derviş, Sibel
In a recent survey of olive groves in the Southeast Anatolia Region of Turkey, a new and serious decline of olive trees, beginning with foliar scorching and then dieback of twigs, branches, and even whole trees, was observed for the first time. In more advanced stages of the disease, necrosis and cankers were observed on the bark of the trunk, branches, and twigs. Isolations from symptomatic tissues from multiple cultivars in diverse locations yielded Neoscytalidium dimidiatum, which were identified using ITS, tef1, and tub2 loci of genomic DNA, in combination with morphological data. In vitro studies showed that conidial germination, hyphal growth, and pycnidia formation of the pathogen were positively correlated with elevated temperatures. Wild type olive “Delice”, “Edincik Su”, and “Memecik” seemed like the most resistant cultivars on which disease severity values were the lowest among 14 screened olive cultivars in two experimental orchards under natural conditions. Pathogenicity tests showed that “Gemlik” was the most susceptible cultivar showing the largest cankers and extensive scorch lesions. Isolates caused canker but not leaf scorch on O. europaea cultivars “Arbequina” “Halhalı”, “Manzanilla”, “Nizip Yağlık”, and “Saurani”. Neoscytalidium isolates are likely to have a negative impact on the health of diverse olive groves, which are primarily confined to Mediterranean-type climatic regions. These findings suggest an increased risk of infection in environments with increasing temperatures, as is common in the Southeast Anatolia Region of Turkey. The information gathered in this study will be used to examine the disease's epidemiology and establish disease control initiatives. This is also the first report of N. dimidiatum infecting O. europaea in the world.
Characterization and pathogenicity of Pythium-like species associated with root and collar rot of kiwifruit in Turkey
(In Plant Disease, 2021) Derviş, Sibel; Özer, Göksel; Karaca, Gürsel; Erper, İsmail; Derviş, Sibel
During the period of June to October in 2018, a widespread decline was observed on kiwifruit vines in the vineyards located in Altınordu, Fatsa, and Perşembe districts of Ordu province. The symptoms were associated with reddish-brown rots expanding from the root to the collar with sparse off-color foliage. Based on the percentage of the total infected samples across 18 vineyards, the most common oomycete species were Globisporangium intermedium (37.1%), Phytopythium vexans (34.3%), G. sylvaticum (14.3%), G. heterothallicum (11.4%), and Pythium dissotocum (2.9%). The morphological identification of isolates was confirmed based on partial DNA sequences containing the nuclear rDNA internal transcribed spacer region (rDNA ITS) and the mitochondrial cytochrome c oxidase subunit II (coxII) gene. The optimum growth temperature and the optimum pH of 5 species ranged from 22.98 to 28.25°C and 5.67 to 8.51, respectively. Pathogenicity tests on the seedlings of kiwifruit cv. Hayward revealed significant differences in virulence among isolates. Phytopythium vexans and G. sylvaticum isolates caused severe root and collar rot resulting in seedling death, while G. heterothallicum and G. intermedium isolates had relatively lower virulence. All Globisporangium spp. and P. vexans isolates significantly decreased plant growth parameters (plant height, shoot and root dry weights and root length); however, P. dissotocum caused very mild symptoms and did not affect these parameters of growth. To our knowledge, this is the first study reporting G. sylvaticum, G. heterothallicum, and G. intermedium causing root and collar rot on kiwifruit not only in Turkey but also in the world.
Clonostachys rosea Strain ST1140: An Endophytic Plant-Growth-Promoting Fungus, and Its Potential Use in Seedbeds with Wheat-Grain Substrate
(SpringerLink, 2023) Derviş, Sibel; Özer, Göksel; Derviş, Sibel
In this study, Clonostachys rosea strain ST1140, a naturally occurring endophyte in healthy roots of a pistachio tree, was identifed morphologically and molecularly through DNA sequencing, and its endophytic ability and growth efect in/on three solanaceous plant species were tested. Three diferent organic substrates (bread wheat-grain, sawdust, and leonardite) were also investigated for their utility in cultivating and multiplying the strain. In-tray and pot experiments, the rates of seed germination and vegetative development of pepper, tomato, and eggplant inoculated with C. rosea at planting were compared to those of non-inoculated controls. In pot experiments, inoculating seedbeds with increasing doses of C. rosea strain ST1140 with wheat-grain substrate resulted in higher plant height values for all plant species, and the strain endophytically colonized the roots of all plant species. In-tray experiments revealed that ST1140 inoculation resulted in 2–4 days earlier and 10% higher germination rates for all plant species, as well as more vigorous and accelerated seedling growth (10–13 days earlier for seedlings at the 4–5 true leaf stage) on all inoculated plant species. Among three diferent organic substrates, wheat-grain was found to be the most efective for long-term cultivation and multiplication of the fungus, which could be of interest for its development as a commercial product. These results promised the strain ST1140’s use as a biofertilizer in seedbeds with a wheat-grain substrate.
Correction to: Leaf spot caused by Alternaria crassa on Datura stramonium in Turkey
(Australasian Plant Disease Notes, 2022) Derviş, Sibel; Alkan, Mehtap; Derviş, Sibel; Özer, Göksel
In August 2021, jimson weed (Datura stramonium) plants growing as weeds in potato fields in Bolu province, Turkey, exhibited leaf spots with dark concentric rings. Sunken and lens-shaped lesions with a light center were also frequently observed on petioles, branches, and stems. Based on morphological characteristics and phylogenetic analysis of the transcription elongation factor 1-α, RNA polymerase second largest subunit, and glyceraldehyde-3- phosphate dehydrogenase loci, the causal agent was identified as Alternaria crassa. The pathogen was successfully re-isolated from inoculated jimson weed plants in the pathogenicity assay, proving Koch’s postulates. Alternaria crassa caused necrotic lesions on potato plants, similar to those of early blight, confirming them as an alternative host of the pathogen. This is apparently the first report of leaf spot caused by A. crassa on jimson weed in Turkey.
The Effect of Talaromyces funiculosus ST976 Isolated from Pistacia vera Rhizosphere on Phosphorus Solubility in Soil Samples with Different Physicochemical Properties
(Kahramanmaraş Sütçü İmam Üniversitesi Tarım ve Doğa Dergisi, 2022) Derviş, Sibel; Eren, Abdullah; Eren, Abdullah; Özer, Göksel
In this study, a total of 78 Talaromyces isolates were isolated from the pistachio (Pistacia vera L.) rhizosphere heavily infested with Neoscytalidium spp. The identification studies of the four representative isolates based on morphological and molecular methods showed that all isolates were T. funiculosus. The 575 bp long sequence of the internal transcribed spacer region of T. funiculosus isolate ST976, selected as a representative of the isolates, was deposited in GenBank under accession no. MW130842. The Maximum Likelihood tree clustered the ST976 isolate with reference T. funiculosus isolates derived from the GenBank nucleotide database. The phosphorus dissolution ability of ST976 isolate was determined by an experiment using six soil samples collected from agricultural lands in various locations of Şanlıurfa province. The pH of the soil samples taken varied between 7.21 and 7.88. As a result of the analysis performed with the addition of the isolate ST976 applied to soil samples with different soil structures (Clay and Clay-Loam), it was determined that the isolate ST976 dissolved 109–311% more phosphorus than the control sample. The study is one of the first studies proving the ability of T. funiculosus isolate ST976 to dissolve phosphorus without any additives to soil solution was determined.
Evaluation of inhibitory effect some bicarbonate carbonate salts against Neoscytalidium dimiatum
(2023) Derviş, Sibel; Türkkan, Muharrem; Özer, Göksel; Derviş, Sibel; Erper, İsmail
Neoscytalidium dimidiatum, a member of the Botryosphaeriaceae family, has emerged as a significant pathogen causing canker and blight diseases in various fruit trees, field crops, park and forest trees, and other hosts. Neoscytalidium dimidiatum is the only recognized species within the genus, with the other two previously recognized species, N. novaehollandiae and N. orchidacearum. There is no suggested chemical control method against Neoscytalidium. In this study, we evaluated the inhibitory effect of some salts on the mycelial growth, germ tube elongation and conidial germination of the N. dimidiatum isolate phylogenetically clustered with the isolates previously recognized as N. novaehollandiae. The antifungal effects of the salts were determined at 0.125, 0.25, 0.5, 1.0 and 2.0% (w/v) concentrations of salts in vitro conditions. Statistically, differences were observed between the inhibitory effects of six salts on the parameters at P ≤ 0.05. The 0.25% and higher concentrations of the ammonium bicarbonate and ammonium carbonate salts completely inhibited mycelial growth, germ tube elongation and conidial germination. Potassium and sodium bicarbonate salts in the highest concentration (2.0%) were able to decrease the mycelial growth, germ tube elongation and conidial germination with the rates of 95.58%-95.58%, 95.05%-95.76% and 77.44%-82.91%, respectively. In addition, potassium and sodium carbonate were able to completely inhibit investigated factors of the pathogen at 2.0% and 1.0% concentrations, respectively. The minimum inhibition concentration values of the ammonium bicarbonate, potassium carbonate and sodium carbonate varied between 0.25% and 2.0%. The minimum fungicidal concentration values of the ammonium carbonate and bicarbonate also ranged between 0.25% and 1.0%. As a result, this study showed that salts of carbonate and bicarbonate could be recommended to manage diseases caused by N. dimidiatum.
Farklı Buğday Genotiplerinden İzole Edilen Endofitik Bakterilerin Fusarium Culmorum'a Karşı Antagonistik Aktivitelerinin Belirlenmesi
(2024) Derviş, Sibel; Aktaş, Hüsnü; Özer, Göksel; Aktaş, Hüsnü; Keske, Mehmet Ata
Bu araştırmada, farklı buğday genotiplerinden elde edilen endofitik bakterilerin, fizyolojik ve biyokimyasal özelliklerinin ile enzim aktivitelerinin yanısıra buğdayda kök ve kökboğazı çürüklüğüne neden olan Fusarium culmorum’a karşı etkinliğinin değerlendirilmesi amaçlanmıştır. İzolatların F. culmorum’a karşı ikili kültür testlerinden elde edilen sonuçlara göre inhibisyon oranı %80.56- %13.90 arasında değişiklik göstermiştir. In vitro koşullarda Fusarium culmorum’a karşı inhibisyon oranı %80.59 oranıyla Bacillus subtilis (MM11), %69.41 oranıyla Stenotrophomonas maltophilia (EY5) ve %61.10 oranıyla Enterobacter sp. (MY3) en etkili izolatlar olmuştur. Amilaz, selülaz, fosfataz, ACC deaminaz ve siderofor üretiminde Pseudomonas putida (EM9) ve Pseudomonas orientalis (MM21) izolatları tüm testte pozitif sonuç vermiştir. Umut vadeden altı izolat 16S rRNA geninin sekans analizi kullanılarak tanımlanmıştır. Bakteri suşlarının F. culmorum’a karşı etkinliğini değerlendirmek için iklim odası koşullarında (in vivo) saksı denemeleri kurulmuştur. Sonuçlar, Enterobacter sp., S. maltophilia ve B. subtilis (MY3+EY5+MM11) kombinasyonunun hastalık şiddeti, bitki boyu, yaş ağırlık, kuru ağırlık, kök yaş ağırlığı ve kök kuru ağırlığı açısından en uygun sonuçları verdiğini göstermiştir. Stenotrophomonas rhizophila, P. putida ve P. orientalis (EY1+EM9+MM21) kombinasyonu da oldukça etkili olmuştur. Etkili bakteri suşlarının kullanılmasının, çevresel etkilerini en aza indirirken, kimyasal gübre ve pestisitlere olan bağımlılığı ve bunlarla ilişkili maliyetleri azaltması beklenmektedir. Ek doğrulama prosedürlerinin ardından bu suşların, ticari uygulamalar için potansiyelinin olduğu düşünülmektedir. Bulgular, F. culmorum’a karşı çeşitli endofitik bakterilerin kullanıldığı biyolojik kontrol çalışmalarına katkıda bulunacaktır.
First report of fruit rot of eggplant caused by Pythium viniferum in Turkey
(SpringerLink, 2021) Derviş, Sibel; Özer, Göksel; Çiftçi, Osman; Derviş, Sibel
In August 2019, symptoms including dark brown and irregular sunken lesions or blights on the fruit pedicel and calyx of eggplants (Solanum melongena L.) occurred with a 3% incidence in two felds in Şanlıurfa province of Turkey.
First report of Fusarium oxysporum causing wilt on lavender (Lavandula angustifolia) in Turkey(
(Journal of Plant Pathology, 2021) Derviş, Sibel; Özer, Göksel; Koşar, İslim; Derviş, Sibel; Günen, Utku
[No abstract available]
First report of Globisporangium heterothallicum causing root and crown rot of pepper in Turkey
(New Disease Reports, 2020) Derviş, Sibel; Özer, Göksel; Türkölmez, Şahimerdan; Çiftçi, Osman
Turkey is the world's third-largest producer of pepper (Capsicum annuum), annually cultivating over 90,000 ha and producing over half a million tonnes of fruit. In 2019, wilting and death of c. 20% of plants were observed in pepper fields in Şanlıurfa province, Turkey (Fig. 1). Severe root and crown rot symptoms with discoloration were observed on affected plants, and necrotic lesions expanded rapidly into the stems which killed the plant (Fig. 2).
First report of Lasiodiplodia theobromae causing dieback on almond (Prunus dulcis) in Turkey
(Springer, 2021) Derviş, Sibel; Türkölmez, Şahimerdan; Derviş, Sibel
Turkey is the world's fourth-largest almond [Prunus dulcis (Mill.) D.A. Webb] producer. In July 2020, 10% of 2,600 9-year-old almond trees cultivars Ferragnes and Ferraduel in Bozova district of Şanlıurfa province showed symptoms of yellowing, gumming, branch and trunk cankers, and dieback. Surface-disinfected wood tissue samples exhibiting visible internal necrosis were placed on potato dextrose agar (PDA). After seven days of incubation at 25 °C in the dark, 12 similar fungal colonies with dark grey colouration were isolated. The isolates Lt01Pd and Lt02Pd were randomly selected for identification, pathogenicity, and deposited in Bolu Abant Izzet Baysal University Culture Collection with accession number BAIBU0738-0739. Fruiting bodies were stromatic, black, 150–250 µm in diameter, and irregular or globose pycnidia with an apical ostiole. Paraphyses produced within pycnidia were hyaline, cylindrical, septate, and up to 60 µm long. Immature conidia formed inside the pycnidia were initially unicellular, hyaline, and ellipsoidal, whilst mature conidia were one-septate, dark brown, and measuring 18.5–23.0 μm × 11.5–13.5 μm (n = 50). BLAST searches for the internal transcribed spacer of rDNA region (ITS: GenBank accession Nos. MW733864-MW733865), translation elongation factor 1-α gene (TEF-1α: GenBank accession Nos. MW733862-MW733863), and β-tubulin 2 gene (BT2: GenBank accession Nos. MW733860-MW733861) sequences at GenBank exhibited 99.81% similarity for ITS (NR_111174) and 100% similarity for TEF-1α (AY640258) and BT2 (EU673110) sequences of type strain CBS 164.96 of Lasiodiplodia theobromae (Pat.) Griffon & Maubl. Pathogenicity of each isolate on ten 1-year-old P. dulcis cv. Ferragnes seedlings was verified by replacing five-mm diameter bark disks of stems with the same-sized mycelial plugs. Control seedlings (n = 10) were inoculated with sterile PDA plugs. All plants were maintained in a greenhouse at 25 ± 2 °C. In the inoculated plants, necrotic lesions with an average length of 6 to 8 cm on wood tissues were observed within 4 weeks. Control seedlings remained symptomless. The same fungus was only re-isolated from symptomatic tissues. In California, a similar canker disease of almond caused by L. theobromae has been reported (Chen et al. 2013). To our knowledge, this is the first report of L. theobromae causing dieback on almond in Turkey (Farr and Rossman 2021).
First report of leaf blight of Turkish oregano (Origanum onites) caused by Neoscytalidium dimidiatum in Turkey
(SpringerLink, 2021) Derviş, Sibel; Özer, Göksel; Koşar, İslim; Güney, İnci Güler; Derviş, Sibel
In July 2020, a leaf blight disease with intense defoliation on Turkish oregano (Origanum onites L.) plants was observed in a pilot experiment feld in Akçakale and a commercial feld in Haliliye with an incidence of 5.4 and 11.7%, respectively, in Şanlıurfa province. After a surface-sterilization for 1 min with 1% NaOCl, isolations from symptomatic tissues of six afected plants for each feld consistently yielded a fungus with the same colony morphology on potato dextrose agar. Cultures were powdery with a thick aerial mycelium, initially white that changed from olive green to black within 10 days.
First report of Macrophomina phaseolina causing charcoal rot on common sage (Salvia officinalis) in Turkey
(SpringerLink, 2021) Derviş, Sibel; Güney, İnci Güler; Derviş, Sibel; Kırlı, Onur; Özer, Göksel
Common sage (Salvia officinalis L.) is a perennial herb or sub-shrub native to the eastern Mediterranean. In July 2020, symptoms of chlorosis, wilting, and root rot appeared in 25% of two-year-old S. officinalis cv. Elif plants in two fields (N 36°53'42.457'', E 38°55'34.777''; N 36°53'27.236'', E 38°55'38.618'') in Şanlıurfa, Turkey.
First report of Macrophomina phaseolina causing charcoal rot on lemon balm (Melissa officinalis) in Turkey
(SpringerLink, 2022) Derviş, Sibel; Güney, İnci Güler; Üner, Senem Ece; Özer, Göksel; Derviş, Sibel
Lemon balm (Melissa ofcinalis L.) is native to the Eastern Mediterranean region and Western Asia and is a well-known medicinal plant of Lamiaceae due to its valuable aqueous and alcoholic extracts (De Sousa et al. 2004). In the summer of 2021, wilting and root rot were observed on about 20% of two-year-old M. ofcinalis cv. Melis plants in a feld of Koruklu village, Akçatepe district of Şanlıurfa, Turkey.
First report of needle blight of blue spruce (Picea pungens) caused by Neoscytalidium dimidiatum in Turkey
(SpringerLink, 2023) Derviş, Sibel; Türkölmez, Şahimerdan; Güney, İnci Güler; Alkan, Mehtap; Özer, Göksel
The blue spruce (Picea pungens Engelm.) is an exotic conifer species widely used for decorative purposes in landscaping and private gardens. In 2020, 60% of forty blue spruce trees between 20 and 25 years old planted in front of buildings in Kavaklıdere, Ankara, displayed needle blight symptoms. Needles on the lower and interior crown closest to the trunk were infected from the bottoms of branches. They showed a brown-colored or burned appearance before dropping off, starting from their tips, resulting in up to a 65% reduction of the canopy. On the surface of infected tissues, a black-colored fungal mass was observed. Fungal colonies isolated from twenty symptomatic branches and needles were initially dark gray and became black within 4 to 7 days. Zero- to one-septate dark brown conidia (4.6 to 9.8 × 3.6 to 7.5 μm) formed in arthric chains were disarticulating and cylindrical-truncate to rod-shaped, oblong, ellipsoidal, doliiform, or globose, consistent with the description of Neoscytalidium spp. (Crous et al. 2006). The internal transcribed spacer, translation elongation factor 1-α, and β-tubulin loci of a randomly selected isolate (Nd_Pp01) were sequenced using the primers ITS1/4, EF1-728 F/986R, and Bt2a/Bt2b and deposited in GenBank under the accession numbers OK643641, OK666381, and OK666382, respectively. The sequences had 99.77–100% nucleotide identity with those of the type specimen of N. dimidiatum, CBS 145.78. Phylogenetic analysis with concatenated sequences further confirmed the identification. The isolate was deposited in the Bolu Abant Izzet Baysal University Culture Collection with accession number BAIBU-179. A pathogenicity test was conducted with ten 1-year-old P. pungens plants by spraying a conidial suspension (105 conidia/ml) of the isolate Nd_Pp01 onto the needles (Türkölmez et al. 2019). Five seedlings sprayed with sterile water were used as controls. All plants were placed in a growth chamber at 28°C with 70% RH. Spray-inoculated needles initially showed yellow spots within two weeks and turned brown six weeks after inoculation, whereas the controls remained symptom-free. The pathogen was re-isolated from the inoculated needles but not from controls. To our knowledge, this is the first report of N. dimidiatum causing needle blight on P. pungens in Turkey and worldwide (Farr and Rossman 2023).
First report of Neoscytalidium dimidiatum associated with dieback and canker of common fig (Ficus carica L.) in Turkey
(SpringerLink, 2022) Derviş, Sibel; Bozoğlu, Tuğba; Özer, Göksel; Türkölmez, Şahimerdan; Derviş, Sibel
In 2020, a canker disease with dieback of branches and decline of various fig trees in Şanlıurfa and Mardin provinces of Turkey was observed. The causal pathogen was identified as Neoscytalidium dimidiatum based on morphological characteristics and phylogenetic analysis of ITS, tef1, and tub2 loci. Koch’s postulates were confirmed by successful re-isolation of N. dimidiatum only from plants inoculated with the pathogen. This is the first report of N. dimidiatum associated with dieback and canker of common fig in Turkey.
First report of Neoscytalidium dimidiatum causing blight of Melissa officinalis in Turkey
(SpringerLink, 2021) Derviş, Sibel; Günen, Tacettin Utku; Koşar, İslim; Güney, İnci Güler; Derviş, Sibel
In July 2020, a blight disease on lemon balm plants was observed with an incidence of up to 10% in three fields in Sanliurfa province, Turkey. The causal agent was identified as Neoscytalidium dimidiatum based on macro- and micro-morphological features of the colonies and sequencing of the translation elongation factor 1-alpha gene and the internal transcribed spacer region of rDNA. Re-isolation of N. dimidiatum from lemon balm plants showing blight symptoms was successfully established. To our knowledge, this is the first report of N. dimidiatum causing blight on lemon balm in Turkey and worldwide.
First report of Neoscytalidium dimidiatum causing foliar and stem blight of lavender in Turkey
(SpringerLink, 2021) Derviş, Sibel; Özer, Göksel; Turan, İrem; Koşar, İslim; Derviş, Sibel
Lavender (Lavandula angustifolia Mill.) is a valuable medicinal and aromatic plant in Turkey, with a cultivated area of 2,218 hectares in 2020 (TURKSTAT 2021). In June 2020, wilting, extensive stem and leaf blight or necrosis were observed in two-year-old lavender plants cultivated in the experimental felds of the GAP Agricultural Research Institute, Şanlıurfa, Turkey.