Browsing by Author "Yaman M."

Now showing 1 - 6 of 6

Distribution and occurrence of microsporidian pathogens of the willow flea beetle, Crepidodera aurata (Coleoptera: Chrysomelidae) in North Turkey
(2015-01-01) Yaman M.; Algi G.; Giiner B.G.; Ünal S.
In this study, microsporidian pathogens in Crepidodera aurata populations were investigated. Totally 1,728 C. aurata adults were examined for microsporidian pathogens and 78 of them were found to be infected. Two species of microsporidia; Microsporidium sp. 1 and Microsporidium sp. 2 were observed in the C. aurata populations from ten localities in North Turkey. They show considerable difference from each other in the spore morphology and dimension, infection rate and host locality. The spores of Microsporidium sp. 1 were oval in shape and measured from 3.66 to 5.66 urn in length and from 1.35 to 2.22 μm in width (n=50). The spores of Microsporidium sp. 2 were slightly curled and measured from 2.44 to 3.55 μm in length and from 1.25 to 1.55 μm in width (n=50). These microsporidia were recorded from C. aurata for the first time. Here we present occurrence and distribution of two microsporidia in C. aurata populations as natural potentially suppressing factors.
First record, occurrence and distribution of entomopathogens in populations of the European cockchafer, Melolontha melolontha (Coleoptera: Scarabaeidae) in Turkey
(2016-01-01) Yaman M.; Algi G.; Güner B.; Ertürk Ö.; Ünal S.; Radek R.
In the present study, the first record, occurrence and distribution of three different pathogens: two protistan pathogens; a coccidian and a neogregarine, and an entomopoxvirus from the European cockchafer, Melolontha melolontha L. (Coleoptera: Scarabaeidae) are given. A neogregarine pathogen was recorded for the first time from M. melolontha populations. A coccidian pathogen, Adelina melolonthae was recorded for the first time for Turkey. An entomopoxvirus was recorded from a new locality, Kocaeli in Turkey, The infections caused by pathogens were observed in the haemolymph and fat body of the adults and larvae. The occurrence and distribution of these pathogens in the M. melolontha populations are also presented.
Isolation and identification of bacteria from four important poplar pests
(2017-01-01) Yaman M.; Ertürk Ö.; Ünal S.; Selek F.
In this study, the bacterial flora of important poplar pests was studied. This included Cryptorhynchus lapathi (Coleoptera: Curculionidae), Sciapteron tabaniformis (Lepidoptera: Sesiidae), Nycteola asiatica (Lepidoptera: Nolidae) and Gypsonoma dealbana (Lepidoptera: Tortricidae). The final goal was to propose alternative ecological control agents for poplar pests and decrease the undesirable effects caused by chemical pesticides in urban areas and urban forests. Forty-three bacteria were isolated from the larvae and adults exhibiting characteristic disease symptoms of these pests in five different localities for the first time. All bacterial isolates were cultured and identified using VITEK bacterial identification systems (VITEK® 2 GN ID card prod. no; 21341 and VITEK® 2 GP ID card prod. no; 21342, bioMerieux, Marcy l’Etoile). The members of the genera from Bacillaceae and Enterobacteriaceae families were most commonly isolated from both pest insects.
Nosema raphidiae sp.n. (Microsporida, Nosematidae): A microsporidian pathogen of the predatory snake-fly Raphidia ophiopsis (Raphidioptera: Raphidiidae)
(2009-12-01) Yaman M.; Radek R.; Tosun O.; Ünal S.
The microsporidium Nosema raphidiae sp.n., a new pathogen of the predatory snake-fly Raphidia ophiopsis is described based on light microscopic and ultrastructural characteristics. It infects the gut of R. ophiopsis. All development stages are in direct contact with the host cell cytoplasm. Meronts with one diplokaryon are spherical or ovoid and are 3.8 to 6.2 μm. Sporonts are spherical to elongate and measure 4.2 to 6.2 μm. Diplokaryotic sporonts divide once to produce two sporoblasts which mature into spores. Sporoblasts are elongated and measure 3.2 to 5.2 μm in length. Fresh spores with nuclei arranged in a diplokaryon are oval and measure 4.13 ± 0.25 μm in length and 2.26 ± 0.19 μm in width. Spores stained with Giemsa's stain measure 3.80 ± 0.25 μm in length and 2.18 ± 0.17 μm in width. Spores have an isofilar polar filament with six or seven coils. All morphological and ultrastructural features indicate that the described microsporidium belongs to the genus Nosema. This species has been named Nosema raphidiae sp. n. after its host's genus.
Occurrence of Gregarina typographi (Apicomplexa, Gregarinidae) and Metschnikowia typographi (Ascomycota, Metschnikowiaceae) in Ips sexdentatus (Coleoptera: Curculionidae, Scolytinae) populations in Kastamonu (Turkey)
(2009-12-01) Unal S.; Yaman M.; Tosun O.; Aydin C.
In this study, Ips sexdentatus (Coleoptera: Curculionidae, Scolytinae) populations from Kastamonu (Turkey) were investigated for the occurrence of entomopathogens. Two species were encountered in the duration of this study and these were Gregarina typographi (Apicomplexa, Gregarinidae) and Metschnikowia typographi (Ascomycota, Metschnikowiaceae). Within the I. sexdentatus samples used in this study total infection rate of the pathogens G. typographi and M. typographi was calculated as 28.9%. Measurements of the Metschnikowia species identified from I. sexdentatus were, as follows: mean length 16.86±2.2 μm and mean width 2.8±0.3 μm (n = 125). The ascospores of this pathogen were characteristically needle-shaped and therefore, easily distinguishable under the light microscope. The occurrence rate for the ascomycete pathogen (M. typographi) was 3.1%. The gregarine pathogen measured 108.1-203.5 μm and was identified as Gregarina typographi. The occurrence rate for the Gregarine pathogen was 25.8%. The first report for Turkey (Kastamonu) of an ascomycete fungus, Meschnikowia typographi from the pine bark beetle Ips sexdentatus (Boerner) is given in this study. © Medwell Journals, 2009.
Survey of pathogens and parasites of the engraver beetle Ips acuminatus (Gyllenhal, 1827) (Coleoptera: Curculionidae: Scolytinae) in Turkey
(2016-01-01) Yaman M.; Algi G.; Ünal S.; Güner B.
Pathogens and parasites of Ips acuminatus were studied for the first time in Turkey. In total, 530 beetles were examined in 2007, 2008 and 2014. Two pathogens, Mattesia sp. (Neogregarinorida: Lipotrophidae), Chytridiopsis cf. typographi (Microsporea: Chytridiopsidae) and unidentified nematodes were found. The prevalence of these pathogens and parasites were 2.4, 0.9 and 52.1%, respectively. While nematodes were observed during all years, Mattesia sp. was observed only in 2008, and C. typographi in 2008 and 2014.