Yazar "Ozgokce, Mehmet Salih" seçeneğine göre listele

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    Determination of the effect of yellow sticky traps on Agonoscena pistaciae (Hemiptera: Psyllidae) population density in pistachio orchards in Siirt, Turkiye
    (Inst Investigaciones Agropecuarias - Inia, 2024) Dilmen, Halil; Ozgokce, Mehmet Salih; Kaplan, Cevdet
    Agonoscena pistaciae (Hemiptera: Psyllidae) is a significant pest in pistachio ( Pistacia vera L.) orchards in T & uuml;rkiye. This study aimed to evaluate the effectiveness of yellow sticky traps as an alternative method for controlling A. pistaciae populations in pistachio orchards. Conducted in late September and early October of 2021 and 2022, during peak pest activity, the experiment was carried out in Siirt, with three replicates following a randomized block design. Five traps were hung on all sides of each tree for sampling. Repeated measures ANOVA (repeated measures; general linear model) was used to observe changes over time. The results indicated that yellow sticky traps were highly effective in mass trapping adults, capturing an average maximum of 12 332.67 adults per trap. A significant decrease in the number of nymphs and eggs on the leaves was observed in the yellow sticky trap-treated trees compared to the control plots by mid-October (P < 0.05). Specifically, the average number of nymphs per composite leaf dropped from 24.95 to 11.23 in 2021, and from 145.18 to 27.29 in 2022. Similarly, the average number of eggs per composite leaf decreased from 61.18 to 2.29 in 2021, and from 73.56 to 3.64 in 2022. These findings suggest that yellow sticky traps can significantly reduce psyllid populations in pistachio orchards over the long term and can be an effective control method when used early in the vegetative period for low- to medium-sized psyllid populations.
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    Öğe
    Molecular Characterization of Agonoscena pistaciae Burckhardt and Lauterer (Hemiptera Psyllidae) Populations Spreading in Southeast Anatolia
    (Springer, 2022) Dilmen, Halil; Ozgokce, Mehmet Salih; Inal, Behcet
    This study aims to explain the genetic kinship relationships among populations of the psyllid species collected from several pistachio orchards in Turkey. Agonoscena pistaciae (Burckhardt and Lauterer) (Hemiptera, Psyllidae) is one of the most important pests of pistachio trees (Pistacia vera L.). This species, which continues its biological periods on pistachio trees, has been rapidly spreading in some parts of the world. Although pistachio psyllid leads to significant yield losses in pistachio trees in Gaziantep and Adiyaman in Turkey, in Siirt province such infestation has historically been very rare. However, the population density has significantly increased in Siirt province and districts in recent years. In this study, an internal transcribed spacer (ITS) DNA barcode identifier was used to determine whether these new outbreaks are a simple spread or the evolution of a new A. pistaciae biotype. In this context, by obtaining a 716-bp long ITS gene region by the polymerase chain reaction process, the genetic kinship relationships among populations of A. pistaciae in Gaziantep, Adiyaman, and Siirt provinces, which have significant potential in pistachio production, were revealed. When the data obtained were examined, no genetic differences could be detected among the population members of A. pistaciae spreading in Siirt, Gaziantep, and Adiyaman provinces. It was determined that A. pistaciae living in these regions are the same species. In addition, in the study the Wolbachia sp. type using the 16S ribosomal RNA gene region was determined.