Yazar "Ozgokce, M. Salih" seçeneğine göre listele

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    Insect fauna of walnut orchards in Van lake river basin
    (Entomological Soc Turkey, Ege Univ, 2011) Atlihan, Remzi; Ozgokce, M. Salih; Kaydan, M. Bora; Kasap, Ismail; Kilincer, Neset; Kiyak, Suat; Polat, Evin
    This study was carried out to determine insect pests and their natural enemies in walnut orchards in Van lake basin in 2005-2006. Steiner funnel, visual observation and rearing method were used for samplings. As a result, 29 phytophagous species belonging to 11 different families and 21 beneficial insect species belonging to 6 families were determined. It was observed that Cydia pomonella (L., 1758) (Lepidoptera: Tortricidae) was the economically important pest, and Panaphis juglandis (Goeze, 1778) (Hemiptera: Callaphididae) had remarkable population level. Chrysoperla carnea (Stephens, 1836) (Neuroptera: Chrysopidae) and Adalia fasciatopuncata revelierei (Mulsant, 1866) (Coleoptera: Coccinellidae) were the most common and widely distributed species among natural enemies obtained.
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    Öğe
    Population density of the important harmful mites and their predatories in the walnut orchards of around Van Lake
    (Entomological Soc Turkey, Ege Univ, 2009) Kasap, Ismail; Atlihan, Remzi; Ozgokce, M. Salih; Kaydan, M. Bora; Polat, Evin; Yarimbatman, Alper
    The aim of this study was to determine the population densities of pest and important predatory mites in the walnut orchards of around Van Lake. The study was conducted in five walnut orchards in the Adilcevaz county in Bitlis (three orchards) and Gevas county in Van (two orchards), during the growing seasons of 2005-2006. Surveys were carried out in every week from May to November. The results of study indicated that the population densities of mites began to increase generally in early July, reached the maximum level at late July and at early August and preserved to late October. In this period, the population densities of Aceria erinea Nalepa (Acari: Eriophyidae) and Eotetranychus carpini (Oudemans) (Acari: Tetranychidae) were determined as 51.9 galls/leaf and 304.1 mites/leaf, respectively. Euseius finlandicus (Oudemans) (Acari: Phytoseiidae) was the most effective predatory mite on E. carpini and A. erinea and it was observed that its population reached to 4.5 mites/leaf. In the sprayed orchard, E. finlandicus population was not enough for controlling mites and the population densities remained at very low levels.
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    Öğe
    Population Growth of Dysaphis pyri (Hemiptera: Aphididae) on Different Pear Cultivars With Discussion on Curve Fitting in Life Table Studies
    (Oxford Univ Press Inc, 2017) Atlihan, Remzi; Kasap, Ismail; Ozgokce, M. Salih; Polat-Akkopru, Evin; Chi, Hsin
    Population growth parameters of the Dysaphis pyri Boyer de Fonscolombe) Hemiptera: Aphididae) were evaluated on four different cultivars Coscia, Ankara, Williams, and Santa-Maria) of pear Pyrus communis L.) under field conditions in the Van region of Turkey. Aphids were kept on leaves of 10-yr-old pear trees in Plexiglas clipcells 20mm in diameter and 10mm in height, with the upper side covered with muslin). For the description of the stage differentiation during population growth, we analyzed raw data of developmental time, survival, and fecundity using the age-stage, two-sex life table to take the variable developmental rate among individuals into account. Results indicated that the Coscia and Ankara cultivars are less favorable hosts for D. pyri because of the longer preadult developmental time, higher preadult mortality rate, and lower total fecundity on these cultivars. The intrinsic rate of increase (r), the net reproduction rate (R-0), and the finite rate of increase (lambda) values were lower on the Coscia and Ankara cultivars. We discussed the application of the Weibull function, polynomial model, and Enkegaard model in life table studies. Because these models are often inaccurate in describing survival and reproduction parameters, we suggest that their application in life table research should be reevaluated.