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Öğe Biodiversity and distribution of soil nematodes in Mount Ararat, Turkey(Russian Society of Nematologists, 2021) Çakmak, Taylan; Gözel, Çiğdem; Gözel, Uğur; Achiri, Denis Tange; Kaydan, Mehmet BoraThe diversity and distribution of soil nematodes were studied in Mount Ararat from the altitude of 1523 to 5000 m a.s.l., in habitats with different ecological characteristics. A total of 2,561 individuals were identified belonging to 31 families, 62 genera and 70 species. The nematode diversity (species richness) and the nematode abundance display recognisable patterns of altitudinal distribution as the number of species reaches a maximum at intermediate elevations, whereas the nematode abundance was significantly higher at the elevated altitudes. The nematode community associated with the marshland habitat was significantly different from those associated to the other four types of habitat.Öğe Effectiveness of four Turkish entomopathogenic nematode isolates against Bactrocera oleae (Diptera: Tephritidae) pupae at different temperatures(2024) Yılmaz, Ayşenur; Çakmak, Taylan; Gözel, UğurTürkiye, is the country of origin of the olive tree and is among the world’s leading olive producers. Most of the olive production in Türkiye is concentrated in Izmir, Aydın, Çanakkale, Balıkesir, Muğla and Bursa Provinces. Bactrocera oleae (Diptera: Tephritidae), being one of the main pests of olive trees, is an important problem in olive cultivation in Türkiye. The efficacy of four Turkish populations of entomopathogenic nematodes against B. oleae pupae was determined under laboratory conditions. They were Steinernema feltiae/12, S. carpocapsae/1133, Heterorhabditis bacteriophora/70, H. bacteriophora/91, which were collected in different regions of Türkiye during our earlier studies. They were tested against the pest by using a single dose at 5 different temperatures (10, 15, 20, 25 and 30 °C). The highest infection rate was observed forH. bacteriophora/91 isolate at 25 °C, and the lowest infection rate was observed for S. feltiae/12 isolate at 10 °C.Öğe First Record of Meloidogyne javanica (Treub, 1885) (Chitwood, 1949) on Lettuce (Lactuca sativa L.) Growing Areas in the Southern Marmara Region(Kahramanmaraş Sütçü İmam Univ, 2024) Yılmaz, Ayşenur; Çakmak, Taylan; Gözel, UğurRoot-knot nematodes are the most important plant parasitic nematode group due to their wide host range and difficulties in control and cause significant quality and yield losses in vegetables including lettuce plants. Root-knot nematodes are causing symptoms such as yellowing, wilting, and stunting on lettuce plants. For monitoring lettuce fields for detecting nematode-infected areas, surveys were made to the lettuce growing areas of & Ccedil;anakkale province in the winter months of 2021-2022 and the plants infected with root-knot nematodes were examined and pure nematode cultures were obtained in the laboratory. A total of 16 plant and soil samples were taken and 3 of them were found to be infected with root-knot nematodes. Species identification was made using morphological methods and morphometric measurements from second-stage infective juvenile and female individuals obtained from pure cultures. As a result, the first record of Meloidogyne javanica in lettuce-growing areas in the Southern Marmara Region was made in this study.Öğe First Report of Root-Knot Nematode Meloidogyne hapla (Chitwood, 1949) (Nematoda: Meloidogynidae) on Petroselinum crispum (Mill.) Nym. ex A.W. Hill) in Türkiye(Kahramanmaraş Sütçü İmam Üniversitesi, 2023) Yılmaz, Ayşenur; Çakmak, Taylan; Gözel, UğurParsley (Petroselinum crispum) is an important culinary herb originated from the Mediterranean basin, where it still can be found in wild forms, and is taxonomically positioned in the Apiaceae family. In Turkey, it is cultivated extensively in the Mediterranean and Aegean Regions, and in the Marmara Region. There are several diseases and pests affecting the yield and quality in the parsley cultivated areas. Root-knot nematodes are among the most important pests in winter crop production with the ability of a wide host plant range. Root-knot nematodes weaken the parsley plant, causing significant quality losses, and showing signs of stunting and yellowing of the leaves. In this study, parsley plants with typical symptoms of root-knot nematodes were detected in surveys conducted in canakkale province, Turkiye. Pure cultures of the root-knot nematode obtained from the roots of parsley were identified up to the species level. Species identification and diagnosis were made by morphological and morphometrical measurements from second-stage juveniles and female individuals obtained from pure cultures. As a result, Meloidogyne hapla was detected first time on parsley plants in Turkiye.Öğe New records of free-living nematode species from Mount Ararat, Turkey, with SEM study of three remarkable species(Springer, 2021) Çakmak, Taylan; Kaydan, M. Bora; Gözel, Çiğdem; Peña-Santiago, Reyes; Abolafia, Joaquín; Gözel, UğurThis paper presents a study of free-living nematodes (excepting Dorylaimida) from Mount Ararat, Turkey. A total of 25 species are recorded, which belong to the orders Enoplida (one species), Triplonchida (2), Chromadorida (1), Monhysterida (2), Plectida (4) and Rhabditida (18). Nine of them are new for the Turkish fauna: Acrobeles andalusicus, A. ciliatus, Acrolobus longigubernaculum, Cervidellus vexilliger, Chiloplacus trilineatus, C. bisexualis, Panagrolaimus rigidus, Propanagrolaimus hygrophilus, and Teratocephalus terrestris. Three species, namely A. longigubernaculum, C. vexilliger and T. auriculatus, are re-described, including morphological and morphometrical data, and SEM study. The altitudinal distribution of the species is also provided.Öğe Soil Nematode Community Analysis of Four Chickpea Cultivated Areas in Aksaray, Türkiye(Kahramanmaraş Sütçü İmam Üniversitesi, 2025) Yılmaz, Ayşenur; Saraçoğlu, Yasemin; Çakmak, Taylan; Gözel, UğurThis study investigates soil nematode communities in four distinct chickpea cultivation areas in Aksaray, Türkiye, to understand their composition, ecological functions, and impact on soil health. Chickpeas, as the nitrogen-fixing crop, play a vital role in sustainable agriculture, supporting soil health and providing economic benefits in rural areas. Soil nematodes, however, including plant-parasitic types like root-knot and lesion nematodes, pose risks to chickpea yield by damaging root systems, thus necessitating effective management strategies. The research took place from May to December 2023 at Düzce University’s Nematology Laboratory. Soil samples from four locations (Akgülü, Bağınbaşı, Camili and Göllü) in Aksaray were collected and using the Baermann funnel technique nematodes were exracted. Nematode identification and ecological parameter analyses used for nematode-based biological monitoring were conducted with light microscopy and structured taxonomic keys. The study grouped the nematodes based on feeding behaviors, showing distinct profiles across locations: bacterivores dominated in Akgülü, while Bağınbaşı had a higher prevalence of plant-parasitic nematodes, suggesting soil biodiversity challenges. Analysis of soil food webs indicated a stressed ecosystem in Akgülü and enriched, structured soil in Bağınbaşı, as shown by higher enrichment and structure index values. These patterns highlight the effects of soil management on nematode communities, with biodiversity directly linked to soil health and chickpea productivity. Findings emphasize that integrated pest management, including crop rotation and resistant chickpea varieties, is essential to mitigate the effects of nematodes. The study provides insights into nematode-driven soil dynamics and underscores the need for further research on nematode impacts in various agroecosystems, particularly for sustainable chickpea cultivation.
