Yazar "Sarikaya, Oguzhan" seçeneğine göre listele
Listeleniyor 1 - 9 / 9
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Can attractant combined yellow sticky traps be used integrated pest management of invasive chestnut gall wasp [Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae)]?(Springer Int Publ Ag, 2025) Sarikaya, Oguzhan; Gencal, Tutku; Kadiogullari, Ali Ihsan; Yildiz, Yafes; Sarikaya, Ayse Gul; Gencal, Burhan; Sen, IsmailThe chestnut gall wasp, Dryocosmus kuriphilus Yasumatsu (Hymenoptera: Cynipidae), was detected for the first time in Turkiye in 2014. The effectiveness in trapping the chestnut gall wasp by using sticky attractant traps combined with attractants during its active flying period was determined. The combination of yellow sticky traps with a mixture of 90% beer and 10% granulated sugar can have a significant impact on the populations of the pest. This method offers a high success rate in chestnut production regions due to reasons such as their success in attracting chestnut gall wasp adults, the fact that they do not have any negative effects on biological control studies carried out using Torymus sinensis, and offers an effective solution for chestnut gall wasp control without negative effects on nature and the environment.Öğe Determining empty seed formation and germination rates induced by Leptoglossus occidentalis (Heidemann) in coniferous species in Turkish forests(Springer Heidelberg, 2024) Parlak, Salih; Yilmaz, Mustafa; Akay, Abdullah Emin; Sarikaya, Oguzhan; Acici, Oezden; Can, Hacer; Kalkan, MehmetIn recent years, low germination rates have been a problem in the seeds of various coniferous species in Turkey, particularly Turkish red pine (Pinus brutia) and black pine (Pinus nigra), which are commonly used species for afforestation activities. The increase in low germination rates corresponds to the spread of Leptoglossus occidentalis (Heidemann) in coniferous forests, suggesting an investigation of the potential correlation between the spread of this insect and the empty seed formation and germination rates. This study aimed to investigate the main causes of empty seeds and low germination rates induced by L. occidentalis in coniferous species in Turkey. Sample cones were collected from various coniferous species, including fir (Abies spp.), stone pine (Pinus pinea), Turkish red pine (Pinus brutia), spruce (Picea orientalis), cedar (Cedrus libani), maritime pine (Pinus pinaster), black pine (Pinus nigra), and Scots pine (Pinus sylvestris), based on their geographical distribution. The seeds were extracted, and the 1000-seed weights were determined for each species, followed by germination tests conducted under controlled conditions. Statistical analysis revealed significant variations in germination rates between species. Among the eight species examined, Scots pine (Pinus sylvestris) had the highest germination rate of 37.9%, while fir (Abies spp) had the lowest rate of 0.4%. Further analysis showed variations in germination rates based on aspects, with generally higher rates observed in sunny aspects. The results indicated that L. occidentalis caused a significant decrease in seed germination ranging from 60 to 99% in coniferous species and reductions in 1000-seed weights ranging from 19 to 81% among the species, except for Scots pine. The findings highlight widespread germination issues in the seeds of most coniferous trees in Turkey. It was found that L. occidentalis significantly contributes to the formation of empty seeds and lower germination rates in coniferous forests. Therefore, developing strategies to protect and conserve seed resources is essential to mitigate negative impacts on forest resources.Öğe Effect of climate change on potential distribution areas of the invasive oak lace bug [Corythucha arcuata (Say, 1832)] (Heteroptera: Tingidae) on oak forests of Turkiye(Springer Heidelberg, 2025) Sarikaya, Oguzhan; Gencal, Tutku; Uzun, Almira; Sarikaya, Ayse Gul; Yildiz, YafesThis study aimed to model the current and future (2041-2060 and 2081-2100) potential distribution areas of the oak lace bug Corythucha arcuata (Say, 1832) with the HadGEM3-GC31-LL model according to the SSP2 and SSP5 emission scenarios. Pearson correlation analysis was performed to select the bioclimatic data to be included in the model. The following seven climatic variables were used: annual mean temperature, maximum temperature in the warmest month, mean temperature during the wettest quarter, mean temperature during the driest quarter, annual precipitation, precipitation seasonality and precipitation during the driest quarter. The current potential distribution area model for C. arcuata established with the Maxent algorithm shows that this species is concentrated in the Marmara and Black Sea regions. According to the HadGEM3-GC31-LL climate change model and the SSP2-45 scenario, during the 2041-2060 (similar to 2050) period, there will be a general narrowing in the species distribution area, with suitable and highly suitable areas concentrated in some regions of Marmara, along the Black Sea coastline, and in the interior. Therefore, state forestry authorities should implement precautions for this pest in oak stands in northern Turkiye.Öğe Larvicidal Effect of Some Essential Oils Against Larvae of the European Pine Sawfly [Neodiprion Sertifer (Geoff.)](Int Journal Lifescience & Pharma Research, 2022) Sarikaya, Oguzhan; Sarikaya, Ayse Gul; Sen, Ismail; Gencal, TutkuMany of the species that cause damage to pine trees by feeding on needle leaves, and trees without leaves may be vulnerable to secondary pests as well as increment loss. One of the important leaf pests that damage Turkish red pine (Pinus brutia) and the Anatolian Black pine (Pinus nigra A.Rich) in Turkey is the pine sawfly Neodiprion sertifer (Geoff.). Only mechanical and chemical control methods are carried out with this pest. Due to the negative effects of chemical control methods on the ecosystem and nature, alternative methods have come to the fore front in recent years. One of them is the use of essential oils against harmful insects. The aim of the study is determine to larvicidal effects of some essential oils against larvae of N. sertifer. To achieve of this aim our objective is applied three different dosages (0.1%, 0.5% and 1.0%) of essential oils obtained from Eucalyptus camaldulensis, Melissa officinalis and Origanum onites plants to the 4th and 5th instar larvae of pine sawfly. Trials were carried out in the laboratory under controlled conditions ( 25 +/- 5 degrees C temperature and 65 +/- 5% proportional humidity). Dead larvae in each box were counted 12, 24, 36 and 48 hours after application. According to the application dosages, the highest deaths of N. sertifer larvae occurred at 1% doses of all three essential oils. It was observed that the larval mortality rates increased as the dosages increased. As a result, essential oils of all three plant species were found to be hopeful in the controlling of N. sertifer, of which essential oil of O.onites was found more effective on the 4th and 5th instar larvae than the essential oils of the other two plant species. They have shown that essential oils can be a potential alternative to synthetic insecticides in the control of pine sawfly.Öğe Modelling the potential distribution of the endemic oak Quercus vulcanica Boiss. & Heldr. ex Kotschy in Turkey from the last interglacial to the future: From near threatened to endangered(Bogucki Wydawnictwo Naukowe, 2022) Sarikaya, Ayse Gul; Orucu, Omer Kamil; Sen, Ismail; Sarikaya, OguzhanThe aims of this study are to model past (LIG, LGM and Mid-Holocene), present and future (2050 and 2070) distributions of the Quercus vulcanica Boiss. & Heldr. ex Kotschy by using Maximum Entropy, and to predict suitable areas for the conservation of the species for future planning. MaxEnt distribution modeling was used to model distributions. Results for past bioclimatic conditions show that the distribution area of the species expanded and then contracted (LIG to LGM and LGM to HOL). The modelling shows that the distribution range of the species will be narrower in the future. The species will be facing extinction towards 2070. Therefore, the conservation status of the species should be evaluated according to the present findings. Although the largest population of the Q. vulcanica is found in Isparta and Afyonkarahisar Provinces located in Southwestern Turkey, this area will not be suitable for the growth and survival of the species in the future. For this reason, a new nature reserve area should be established in a more suitable climate.Öğe Notes on bark beetle fauna in forests of Bursa Province (Marmara Region) of Turkey, with new records for Marmara Region(Univ Oradea Publ House, 2023) Gencal, Tutku; Sarikaya, Oguzhan[Abstract Not Available]Öğe Predatory species of Scolytinae in Bursa province of Turkey(Al-Farabi Kazakh Natl Univ, 2023) Gencal, Tutku; Sarikaya, OguzhanScolytinae, a large group of Coleoptera, are a vital community that causes forest damage. Species such as Pityokteines curvidens (Germar), Orthotomicus erosus (Wollaston), Tomicus destruens (Wollaston), Tomicus minor (Hartig) and Ips sexdentatus (Boerner) are particularly prevalent in the region. In recent years, the prevalence of bark beetle species causing tree damage in the Bursa province has increased. The purpose of this study was to determine the predator species of bark beetles responsible for causing damage in the forest areas of the Bursa province. Specimens were collected from 8 sites in the study area and identified as belonging to 25 species in 2 orders and 12 families. In study found that species such as Synuchus vivalis (Illiger), Opilo taeniatus (Klug), Trichodes apiarius (Linnaeus), Anthrenus scrophulariae (Linnaeus), Trogoderma angustum (Solier), Trogoderma glabrum (Herbst), Ampedus cinnaberinus (Eschscholtz), Cylister angustatus (Hoffmann), Cylister filiformis (Erichson), Rhizophagus depressus (Fabricius), Rhizophagus dispar (Paykull), Ipidia binotata (Reitter), Corticeus linearis (Fabricius), Corticeus pini (Panzer), Nemosoma elongatum (Linnaeus) and Dichrostigma flavipes (Stein) represent new records for both the Marmara Region and the Bursa province. It has been observed that eight species of insects, region Clerus mutillarius (Fabricius), Thanasimus formicarius (Linnaeus), Aulonium ruficorne (Oliver), Cylister elongatus (Thunberg), Hypnogyra angularis (Ganglbauer), Megalinus scutellaris (Fauvel), Corticeus fraxini (Kugelann) and Temnochila caerulea (Olivier), have set new records for both the Marmara Region and the Bursa province of Turkey. Additionally, the presence of these species in the Bursa province represents a new record for the area. These findings were obtained through extensive studies of the insect populations in these regions.Öğe Predicting the future distributions of Calomicrus apicalis Demaison, 1891 (Coleoptera: Chrysomelidae) under climate change(Springer Heidelberg, 2022) Sen, Ismail; Sarikaya, Oguzhan; Orucu, Omer K.Climate change is one of the main drivers of the changes in the distribution of species in the twenty-first century. Thus, the number of studies on the prediction of the effects of climate change on species is increasing day by day. Calomicrus apicalis is a pest leaf beetle (Coleoptera: Chrysomelidae) species which only distributes in Cyprus, Syria, and Turkey. The species causes important damages especially on Taurus cedar (Cedrus libani) stands of Turkish forests and also feeds on Pinus brutia, P. nigra, and P. sylvestris trees. This study aims to model the current and future (2041-2060 and 2081-2100) distribution of this pest species according to SSP2 and SSP5 emission scenarios given by the MIROC6 climate change model. Maximum entropy (MaxEnt) modeling was used to determine the current and future potential distribution of the species. Also, post-modeling analyses were performed to reveal the changes in both spatial distribution and niche suitability of the area (according to presence probability classes) between present and future distribution ranges of the species. The most important bioclimatic variables which shape the range of the species were precipitation of driest quarter, temperature seasonality, and precipitation of driest month. As a result of the study, it is determined that the current distribution of the species could be wider than its known distribution range. Most of all, the whole of the Aegean Region is a highly suitable area for the species. According to our models, the distribution of the species under climate change will expand toward the Sivas Province from the present to 2041-2060 and 2081-2100. However, the distribution of the species will shrink considerably from 2041-2060 to 2081-2100 because of changing climate. According to the change analysis, highly suitable areas for the species will decrease by around 36% and 15% by 2081-2100 according to the SSP2 and SSP5 scenarios, respectively. Although the distribution of the species will shrink in the future, the species should be observed up to 2041-2060 because it will distribute more widely in this period (current to 2041-2060) and cause damages in weakened trees due to drought stress.Öğe THE CURRENT AND FUTURE COMPLIANCE AREAS OF KERMES OAK (QUERCUS COCCIFERA L.) UNDER CLIMATE CHANGE IN TURKEY(Parlar Scientific Publications (P S P), 2021) Babalik, Ahmet Alper; Sarikaya, Oguzhan; Orucu, Omer KamilModeling the niches and distributions of the species using machine learning technique has become one of the effective tools of conservation planning today. Analyzing how the main species of our country will be affected by climate change is of great importance for planning about these species. Quercus coccifera which is one of the important evergreen oak species in Turkey, is easily selected by goats and constitutes a high proportion of their diets. In this study, it is aimed to determine the potential distribution area of Quercus coccifera and how it will be affected by climate change. Bioclimate layers with a resolution of approximately 1 km(2) (30 arc seconds) obtained from the WorldClim database with the presence data of the species were cut within the specified limits and processed with the Maximum Entropy algorithm to determine the potential distribution area of the species in today's conditions. In addition, the potential distribution area in 2050 and 2070 was modeled according to the climate scenarios in RCP 2.6, RCP 4.5, RCP 6.0 and RCP 8.5 in order to determine how the distribution area of the species will be affected by climate change. According to the CCSM4 climate change scenario, it is seen that there are losses in potential distribution areas of the species in the future. The result of the study shows that the current and future spread areas of Quercus coccifera, which is spread in a very limited area, will gradually narrow.
