Ugur Gozel

• PhD
• Prof. Dr. at University of Canakkale Onsekiz Mart

This 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 are...

Root-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 f...

Binlerce yıllık geçmişe sahip olan zeytin, Akdeniz ikliminin hüküm sürdüğü bölgelerde yetişmektedir. Dünya zeytin üretiminin büyük çoğunluğu, İspanya, İtalya, Türkiye gibi Akdeniz'e kıyısı olan ülkelerde gerçekleşmektedir. Türkiye, zeytin üretiminde dünya genelinde önemli bir konuma sahiptir ve bu başarısını iklim koşulları, verimli toprakları ve t...

Türkiye, is the country of origin of olive trees and being among the world’s leading olive producers. Apparently, most of the olive production is concentrated in Türkiye include 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...

Identification of Root-knot Nematode (Meloidogyne spp. Goeldi, 1887) (Tylenchida: Meloidogynidae) Species in Celery (Apium graveolens L.) (Apiaceae) Growing Areas of Çanakkale Province ABSTRACT In this study, the species and extensiveness of root-knot nematodes (Meloidogyne spp. Goeldi, 1887) (Tylenchida: Meloidogynidae) causing yield loss in the c...

First Report of Root-Knot Nematode Meloidogyne hapla (Chitwood, 1949) (Nematoda: Meloidogynidae) on Petroselinum crispum (Mill.) Nym. ex A.W. Hill) in Turkey ABSTRACT Parsley (Petroselinum crispum), a vegetable whose leaves are consumed, is taxonomomically positioned in the Apiaceae family. The origin of parsley is known as the Mediterranean Region...

The aim of the study was to determine the germination and seedling growth performances of 25 rootstock candidates of almond genotypes and their tolerance to Meloidogyne incognita and Meloidogyne javanica nematode species. It was found that genotypes 29, 57, 58, 76, and 156 showed a germination output of over 90% in the years 2017 and 2018 and they...

Determination of the soil persistency of native entomopathogenic nematodes applied with a drip irrigation system in a peach orchard Çiğdem ŞAHİN ,Uğur GÖZEL Abstract: The period of persistence of entomopathogenic nematodes (EPNs) in soil is an important factor in the success of biological control efforts. In this study, the persistency of four na...

Entomopatojen nematodların topraktaki hayatta kalma süreleri biyolojik mücadele çalışmalarının başarısı için önemlidir. Bu çalışmada bir şeftali bahçesinde 4 yerel entomopatojen nematod (EPN) türü; Steinernema feltiae Filipjev (Nematoda: Steinernematidae), S. carpocapsae Weiser (Nematoda: Steinernematidae), S. affine Bovien (Nematoda:Steinernematid...

Lemon palm (Melissa officinalis L.), a perennial plant from Lamiaceae family, is cultivated in all Mediterranean countries and coastal regions of Turkey. It can be attacked by several pathogens like nematodes which reduce its yield and quality. In this study, morphometric measurements, morphological and molecular identifications were done using juv...

Entomopathogenic nematodes (EPN) have an important potential in the biological control of agricultural soil pests. Efficacy and persistence of native EPN species from Turkey were investigated against Capnodis tenebrionis (L.) (Coleoptera: Buprestidae) larvae with different irrigation methods in a peach (Prunus persica L. Rosaceae) orchard for two y...

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...

Calendula officinalis L. (Asteraceae) is a traditional medicinal plant called pot marigold or English marigold. In this study, galled roots of pot marigold were collected from Balıkesir province of Turkey and egg masses were picked up from the roots of each plant with fine forceps. DNA was then extracted from samples and analyzed by species-specifi...

In this study, the efficacy of Turkish isolates of four entomopathogenic nematodes (EPNs) against the last instar larvae of the potato tuber moth, Phthorimaea operculella Zeller (Lepidoptera: Gelechiidae) were investigated under laboratory conditions. Potato moths were collected from infested potato fields in Derinkuyu (Nevşehir Province) in June 2...

Wheat is one of the most important cultivated plants in our country. The main pest that causes economic losses in wheat production is sunn pest Eurygaster integriceps. In this study the mortality of three native entomopathogenic nematodes (EPNs) species Steinernema feltiae (Yalova), S. carpocapsae (Sakarya) and Heterorhabditis bacteriophora (Sakar...

In this study the virulence of Steinernema affine 46, S. feltiae 96, S. carpocapsae 1133 and Heterorhabditis bacteriophora 1144 isolates against the last instar larvae of Palpita unionalis (Hübner) were investigated on plates in laboratory and pots in a climate room. Efficacy of entomopathogenic nematodes were determined at 25 oC using two differen...

This 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. c...

The pine processionary moth, Thaumetopoea pityocampa Den. & Schiff. (Lepidoptera: Thaumetopoeidae), is one of the most important pests of forest trees. In this study, the efficacy of native entomopathogenic nematodes (EPNs) against the larvae of T. pityocampa was investigated under laboratory conditions. Isolates of Steinernema carpocapsae Weiser,...

In this study, the efficacy of four local entomopathogenic nematodes (EPNs), Steinernema affine, Steinernema carpocapsae, Steinernema feltiae and Heterorhabditis bacteriophora, against melon fly (Myiopardalis pardalina), was investigated under laboratory conditions. The tested EPNs were collected from different localities in Turkey and the melon...

Entomopathogenic nematodes (EPN) have a high potential for control of pests living in isolated places such as underground or galleries. In this study, mortality rates of Capnodis tenebrionis (L., 1758) (Coleoptera: Buprestidae) larvae from four EPN species Steinernema affine Bovien, 1937, Steinernema carpocapsae Weiser, 1934, Steinernema feltiae Fi...

In this study, plant parasitic nematode fauna from Mount Ararat is described with respect to altitude. A total of 30 soil samples were taken in 2013 during the summer season. Nematodes were extracted by using modified Baermann’s (1917) funnel technique. The identification of nematodes were done with morphologic characters, morphometric measurements...

Bu çalışmada yerel entomopatojen nematod izolatları olan Steinernema affine (46), Steinernema feltiae (96) türlerinin Zeytin fidan tırtılı Palpita unionalis (Hübner) son dönem larvaları üzerindeki etkinlikleri laboratuvar ve saksı koşullarında araştırılmıştır. P. unionalis larvaları Çanakkale İli'ndeki zeytin bahçelerinden toplanmıştır. Laboratuvar...

Bu çalışmada ülkemiz topraklarından elde edilmiş entomopatojen nematodların (EPN) laboratuvarda elma iç kurdu larvaları Cydia pomonella L. (Lep.: Tortricidae) üzerindeki etkinlikleri araştırılmıştır. Dört farklı sıcaklık (10, 15, 20 ve 25 oC) ile üç farklı uygulama yoğunluğunun (100, 200 ve 400 IJs/larva) kullanıldığı çalışma 12 tekerrürlü olarak y...

Yerel entomopatojen nematodlardan (EPN), Steinernema affine (46) ve S. carpocapsae (1133)’nin Helicoverpa armigera Hübner (Lepidoptera: Noctuidae) larvaları üzerindeki etkinliklerinin araştırıldığı bu çalışma, 10, 50 ve 100 IJs/larva olmak üzere üç farklı uygulama dozunda ve 25 °C’de yürütülmüştür. EPN uygulamasından 72 saat sonra H. armigera larva...

We studied the nematicidal effects of olive pomace (OP) and green walnut husk (GWH) on root-knot nematode (Meloidogyne incognita) in tomato. We determined under in-vitro conditions, the efficacy of OP and GWH extracts (0, 25, 50, 75 and 100%) against the second stage juvenile of M. incognita. Then, GWH and OP were mixed with sandy loam soil at rate...

In recent years, researchers have been looking for more sustainable and environmentally friendly ways to control of plant pests. The use of essential oils has the potential to become an alternative control strategy against plant parasitic nematodes. The root-knot nematodes are the most destructive group of plant parasitic nematodes all over the wor...

During the last few decades, researchers have been in the search for environmental friendly ways to cope with agricultural pests, instead of using chemical pesticides. The use of essential oils has a high potential to become an alternative control strategy against plant parasitic nematodes. This study was conducted to determine the toxicity of 10 e...

The aim of this study was to obtain much faster compost under controlled temperature and aeration conditions. Experiment was conducted at Canakkale Onsekiz Mart University. The composting system included four 100 L volume reactors. Three thermocouple wires were placed at the top, center and bottom of each reactor to measure the temperature of the c...

Morphological characters and morphometric measurements are used for diagnosis and identification of nematodes. In some cases, reliable results can not be achieved by classic methods. Therefore, molecular markers have been applied to nematode identification. Molecular markers are methods based on DNA. In this article, information regarding to the mo...

Study was conducted to determine the distribution of the entomopathogenic nematodes in apple growing areas in Karaman province, Turkey and their efficacy on Galleria mellonella (Lepidoptera: Pyralidae). Soil samples were collected from 130 apple orchards in April 2012 and 2013. Entomopathogenic nematodes were found in 25 samples (19.23%). Entomopat...

Odemis is one of the most important nursery tree and ornamental production centre of Turkey. This study was conducted in Odemis District of Izmir Province in stone and pome fruit production areas from 2008 to 2011. In this study, determination of plant parasitic nematode species and nematode-infested areas was aimed. For this purpose, a total of 36...

In this study the efficacy of entomopathogenic nematodes; Steinernema affine (Bovien), S. carpocapsae (Weiser), S. feltiae (Filipjev) and Heterorhabtidis bacteriophora (Poinar) on the larvae of Rhynchophorus ferrugineus (Olivier, 1790) (Red Palm Weevil) were investigated. In the bioassays, 9x5x5 cm sized plastic boxes were used. Base of each box, W...

Red Palm Weevil (RPW), Rhynchophorus ferrugineus is an important pest against to the species that belongs to Arecaceae family causes serious diseases particularly on date palm, coconut and palm trees. Cultural, biotechnical methods and pesticides are using to protect the plants from this pest. As we know pesticides causes different problems on huma...

The frequent widespread usages of pesticides lead to variousimpactsamong both the organisms and the environment. These interrelated impacts are usually considered as a warning indicator for taking precautions.Soil ecosystems support a diversity of fungi, bacteria, algae, protozoa, arthropods and nematodes. Several reasons make nematodes as consider...

Human impact on the environment is a global issue and causes serious damages to the nature. The number of these human based harms are also increasing in Turkey nowadays. Some of the international gold mining corporations and their subsuppliers have started to drill for gold in Kazdağı recently. Kazdağı is located in the Biga Peninsula as a natural...

Three Turkish strains of the entomopathogenic nematodes, Steinernema carpocapsae (Adapazari), S. feltiae (Canakkale) and Heterorhabditis bacteriophora (Kirklareli), were tested in the laboratory for their virulence on the last instar larvae of the corn stalk borer, Sesamia cretica. Mortality rates of last instar S. cretica larvae were determined fo...

Two introduced species of citrus whiteflies, Dialeurodes citri and Parabemisia myricae met in the east mediterranean area of Turkey and proved to be ecological homologues. P. myricae is the superior competitor on account of its faster development and broader ecological niche and started to replace D. citri. After a most effective parasitoid of P. m...

Infestation levels of the red palm weevil, Rhynchophorus ferrugineus (Oliver, 1790) and its natural enemies on palm trees in recreation areas were investigated in the Adana province of Turkey in 2008. The trunks of dead palms were sampled for R. ferrugineus and for the presence of entomopathogenic nematodes. While 20% of Phoenix canariensis Hort. w...

Genetic variation among different 29 root-knot nematode populations was characterized by using amplified fragment length polymorphisms (AFLP). Twenty-two nematode samples collected from infected vegetables (tomato, cucumber, eggplant, pepper and melon) at various locations of the Mediterranean Region in Turkey were screened together with seven refe...

The nematode worm Scottnema lindsayae (Cephalobidae) was found near the base of the Beardmore Glacier in the Transantarctic Mountains 83.48 degrees S, over 5 degrees further south than previously recorded. Identification was confirmed using morphological analyses of males, females and juvenile stages, and by DNA sequencing of the ITS1 region of the...

Steinernema texanum n. sp. is characterised by morphometrics of the infective juvenile with body length = 756 μm, distance from anterior end to the excretory pore = 59 μm, tail = 73 μm, ratio a = 25, H% = 59 and E% = 81. The lateral field pattern of the new species is 2, 7, 2, and is typical for the species. The male of the first generation can be...

A new root-lesion nematode Pratylenchus hippeastri n. sp. is described from amaryllis (Hippeastrum spp.) in Florida. The new species is characterised by a combination of the following morphological features of females: slender body, flat, plain and smooth face, head with two lip annuli, an incomplete third annulus, and with second lip annulus thick...

The D2-D3 and ITS regions of rDNA from 33 Florida populations of Belonolaimus spp. were sequenced and subjected to phylogenetic analysis. Our objective was to derive a theoretical evolutionary framework for interpreting phenotypic differences as they relate to the taxonomy of the genus. The most striking aspect of the phylogenetic analysis is that...

Taxonomic keys and original descriptions were used to identify 26 Xiphinema americanum-group populations from Florida comprising X. georgianum (eight populations), X. citricolum (six), X. floridae (six), X. laevistriatum (five) and X. tarjanense (one). Principal component analysis of a subset of 19 morphometric characters accorded with the species...

A new species of entomopathogenic nematode, Steinernema khoisanae n. sp. is described from South Africa. The new species is characterised by morphometrics of the infective juvenile with body length 1076 μm, narrow body diameter of 33 μm, excretory pore 94 μm from anterior end, tail 85 μm long, a = 33, D% = 68, H% = 57, and E% = 111. The lateral fie...

In a survey of entomopathogenic nematodes associated with plants and trees in areas adjacent to production citrus groves in Florida, a new species of nematode in the genus Heterorhabditis was found based of morphological and molecular studies. The new nematode is described as Heterorhabditis floridensis n. sp. H. floridensis n. sp. is characterized...

Steinernema yirgalemense, a new species based on morphological and molecular data, is described from Yirgalem, Ethiopia. This nematode belongs to the 'bicornutum-group' which includes nematodes with horn-like structures in the labial region of the infective juvenile. The new species can be recognised by the infective juvenile having a body length o...

Fragments containing the internal transcribed spacer (ITS) ribosomal rDNA were amplified from Meloidogyne incognita, M. javanica, M. arenaria and M. hapla by polymerase chain reaction (PCR). Only digestion of the ITS region with the enzyme Rsal significantly distinguished M. hapla from other species, while other enzymes, EcoRl and BamHl, were not e...

Two introduced species of citrus whiteflies, Dzaleurodes citvi and Pavabemzsza myricae met it1 the east mediterranean area of Turke and proved to be ecological hotnologues. P. myrzcae is the superior competitor on account of its hster development and broader ecological niche and started to replace D. n'tri. After a most effective parasitoid of P. m...