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    Allelopathic effect of Origanum syriacum var. bevanii (Holmes) (Lamiales: Lamiaceae) and Rhododendron ponticum L. (Ericales: Ericaceae) essential oils and extracts on Meloidogyne incognita (Kofoid & White, 1919) (Rhabditida: Meloidogynidae)
    (Entomological Soc Turkey, Ege Univ, 2023) Cakmak, Taylan; Arslan, Zubeyde Filiz; Yurttas, Salih; Tas, Murat Emin
    In this study, the nematicidal activity of essential oils and extracts of Origanum syriacum var. bevanii (Holmes) of Meloidogyne incognita (Kofoid & White, 1919) (Rhabditida: Meloidogynidae) were evaluated in Petri dish and pot experiments. The essential oils and extracts were applied directly to J2s at concentrations of 5 and 10% (w/v). The mortality of J2s of M. incognita was recorded 24, 48, and 72 hours after treatments. The results showed that a 100% mortality rate was obtained from both concentrations (5 and 10%) of O. syriacum var. bevanii essential oil application. Moreover, the pot experiment showed that O. syriacum var. bevanii essential oil (5%) (w/v) and O. syriacum var. bevanii extract (10%) was more effective against the J2s of M. incognita on tomato plants. Results were promising in terms of testing the effects of essential oil and extracts obtained from the determined plants in laboratory conditions against M. incognita.
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    Biodiversity and distribution of soil nematodes in Mount Ararat, Turkey
    (Russian Acad Sci, Inst Parasitology, 2021) Cakmak, Taylan; Gozel, Cigdem; Gozel, Ugur; Achiri, Denis Tange; Kaydan, Mehmet Bora
    The 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.
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    Comparative analysis of soil nematode biodiversity from five different fruit orchards in Osmaneli district, Bilecik, Türkiye
    (Soc Nematologists, 2024) Cakmak, Taylan
    Nematode population densities were determined in 60 soil and root samples collected from 6 fruit orchards in the Bilecik province (western Turkey), between April 2022 and June 2022. The total number of identified nematodes have reached up to 2418 individuals (number of female: 1036; male: 154; and juvenile: 1228). They belong to 54 species, 54 genera, 33 families and 11 orders. Plant parasitic nematodes that were detected mostly are listed as follows: Helicotylenchus (6,12 %), Pratylenchus (5,74 %), Paratylenchus (4.83 %), Xiphinema (3,06 %), Tylenchorhynchus (2,19 %), Malenchus (1.94 %) and Tylenchus (1.19 %). According to the maturity index analysis, mean values showed the highest maturity level at peach trees (MI value: 3,52), followed by; walnut trees (MI value: 2.49), cherry trees (MI value: 2.15), nectarine trees (MI value: 1.86), plum trees (MI value: 1.57), and olive trees (MI value: 1.42). Mostly the diverse group in terms of species richness was within the order Dorylaimida. The nematodes associated with peach and walnut trees here showed the most stable environments in terms of soil nematode community structure.
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    First Report of Root-Knot Nematode Meloidogyne hapla (Chitwood, 1949) (Nematoda: Meloidogynidae) on Petroselinum crispum (Mill.) Nym. ex A.W. Hill) in Türkiye
    (Kahramanmaras Sutcu Imam Univ Rektorlugu, 2023) Yilmaz, Ayenur; Cakmak, Taylan; Gozel, Ugur
    Parsley (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.
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    The nematode assemblages of a lake ecosystem (Lake Korugol Natural Park, Duzce, West Black Sea Cost of Turkiye): ecology and biodiversity patterns with first reports of 10 genera to the Turkiye nematofauna
    (Entomological Soc Turkey, Ege Univ, 2023) Cakmak, Taylan
    This research was conducted to reveal the soil nematode fauna of Korugol, Duzce and to contribute to the nematode diversity of the Western Black Sea Region of Turkiye. Field studies within the scope of the study were implemented in 2021. As a result of the study, 29 families, 45 genera and 46 nematode taxa were identified. 10 Lindseyus, Metateratocephalus, Paractinolaimus and Tripylella are the first report for Turkiye's nematofauna. Classification of nematodes according to their feeding types were: 27.27% bacterivorous nematodes, 2.10% fungivoresnematodes, 1.51% herbivorous nematodes, 16.35% predator nematodes and 52.77% omnivorous nematodes.