Browsing by Author "Ulgenturk, Selma"

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Coccoidea (Hemiptera) Species of Taurus Cedar (Cedrus Libani) in Turkey
(Entomological Soc Turkey, Ege Univ, 2012) Ulgenturk, Selma; Sahin, Ozlem; Ayhan, Bikem; Saribasak, Halil; Kaydan, M. Bora
Coccoidea species on Taurus cedar (Cedrus libani A. Richard) was collected natural cedar forests, reforestations and urban green areas in mainly Aegean, Marmara, Mediterranean and some neighboring regions. Totally 11 species were determined from Diaspididae (8), Coccidae (2), Pseudococcidae (1), four of them (Chionaspis kabyliensis Balachowsky, Dynaspidotus jaapi (Leonardi), Gomezmenoraspis nr. pinicola (Leonardi) and Phenacoccus arambourgi (Balachowsky) are new records for Turkish fauna. Ceroplastes floridensis Comstock and Dynaspidiotus britannicus (Newstead) are new records on C. libani in the world.
Effects of Some Fungicides on Isaria Farinosa, and in Vitro Growth and Infection Rate on Planococcus Citri
(Springer, 2011) Demirci, Fikret; Mustu, Murat; Kaydan, M. Bora; Ulgenturk, Selma
The effects of some fungicides used against citrus diseases, on mycelial growth and conidial germination of Isaria farinosa (Holmsk.) Fries [Sordariomycetes: Hypocreales] and also on the pathogenicity of the fungus on citrus mealybug, Planococcus citri (Risso), were determined. Systemic fungicides such as tebuconazole, penconazole and nuarimol were the most effective as regards both conidial germination and mycelial growth. Protective fungicides such as captan, chlorothalonil, mancozeb and propineb inhibited conidial germination at between 1 and 5 mu g ml(-1) concentration, but captan, chlorothalonil and propineb did not inhibit the mycelial growth at 5,000 mu g ml(-1). Mancozeb inhibited mycelial growth between 2,500 and 5,000 mu g ml(-1). Sulphur and copper oxychloride did not inhibit the fungus even at very high concentrations. Sulphur, copper oxychloride, fosetyl-al, chlorothalonil and carbendazim did not decrease the mortality percentage caused by I. farinosa. Tebuconazole, penconazole and mancozeb were the most effective and respectively reduced the mortality from 83% to 33%, 28% and 30% in the ovisacs, from 81% to 29%, 27% and 29% in the 1st instar larvae, and from 84% to 34% in the adult females.
Faunistic Studies on Aleyrodidae Species of Bartin and Kastamonu Provinces
(Entomological Soc Turkey, Ege Univ, 2012) Ulusoy, M. Rifat; Karut, Kamil; Ozdemir, Isil; Ulgenturk, Selma; Kaydan, M. Bora
The aim of this study was to determine Aleyrodidae fauna in Bartin and Kastamonu provinces. Two [Aleurochiton acerinus Haupt, Dialeurodes kirkaldyi (Kotinsky)] were new records for the Turkish fauna among the totally 8 species determined in the Region. Their identification, host plants, and distribution in Turkey and in the world were presented as detailed.
Laboratory Evaluation of the Effectiveness of the Entomopathogen; Isaria Farinosa, on Citrus Mealybug, Planococcus Citri
(Springer Heidelberg, 2011) Demirci, Fikret; Mustu, Murat; Kaydan, M. Bora; Ulgenturk, Selma
Citrus mealybug Planococcus citri (Risso) (Hemiptera: Pseudococcidae) is one of the main pests on citrus trees. Biological control of the pest is based on the release of hymenopterous parasitoids and coccinellid predators at present. The effectiveness of entomopathogen fungus Isaria farinosa (Holmsk.) Fries ([Sordariomycetes: Hypocreales] (Syn: Paecilomyces farinosus), as an alternative biological control agent on citrus mealybug, was investigated using four different inoculum densities and different relative humidities (RH). The entomopathogen caused 89.39% mortality in ovisacs, 84.07% mortality in second larval stage, 84.53% mortality in adult females, and 78.71% mortality in first larval stage at 95% RH and at 1 x 10(8) conidia ml(-1) inoculum concentration. Percent mortalities were between 50 and 60 in ovisac, first and second larval stage at 95% RH and at 1 x 10(7) conidia ml(-1). Percent mortality was decreased parallel to the decrease in humidity level and inoculum densities; however, the fungus caused significant infection in 70% and 80% RH. These results demonstrated that the effectiveness of the entomopathogen is promising for biocontrol of citrus mealybug.
Life Table of Pseudaulacaspis Pentagona Targioni-Tozzetti (Hemiptera: Diaspididae) at Different Temperatures on White and Black Mulberries
(Tubitak Scientific & Technological Research Council Turkey, 2023) Dokuyucu, Oezden; Ulgenturk, Selma; Ozgokce, Mehmet Salih
Some biological characteristics and life table of Mulberry scale [Pseudaulacaspis pentagona Targioni-Tozzetti (Hemiptera: Diaspididae)], which is an important thermophilic, invasive, and polyphagous pest of fruit trees, was investigated. The research has been conducted at 7 different temperatures (20.6, 23.2, 27.1, 29.0, 30.6, 31.3, 33.8 degrees C) on two different mulberry species (Morus alba and M. nigra) in the climate chambers with fixed illumination regime (16 : 8 h) and relative humidity (60% +/- 5%) conditions. The total longevity of female individuals on M. alba were 120.54, 86.79, 63.54, 57.51, 41.35, and 26.27 days, while 110.61, 99.62, 63.84, 70.92, 40.23, and 50.94 days on M. nigra. At these temperatures, the intrinsic rate of increase (r) of P. pentagona on M. alba were -0.012, 0.045, 0.078, 0.066,-0.022 day-1, while -0.019, 0.003, 0.052, 0.043, -0.039, and -0.076 day-1 on M. nigra, respectively. According to the study results, it was found that the population parameters of P. pentagona were generally higher for populations fed on white mulberry than for populations fed on black mulberry, at most of the different temperatures tested. Using the results of this study, it was concluded that black mulberry in regions with optimum temperatures between 23-29 degrees C and white mulberry in warmer areas (29 degrees C and above) would be more appropriate in terms of control P. pentagona.
Predicting Future Distribution and Generation Number of Mulberry Scale, Pseudaulacapis Pentagona Under Climate Change Scenarios in Turkiye
(Springer, 2025) Dokuyucu, Ozden; Eskioglu, Osman; Ozgokce, Mehmet Salih; Ulgenturk, Selma
Mulberry scale, Pseudaulacaspis pentagona (Targioni-Tozzetti) (Hemiptera: Diaspididae) is a serious pest of orchards, forests, and woody ornamental vegetation in Turkiye. Climate change may significantly affect the bio-ecology and the geographical distribution of the scale insect. The development threshold (C) and the temperature constant (K) of P. pentagona were determined by the linear regression model to study of this scenario. Non-linear regression models were used to estimate the optimum temperature and the low and the high temperature thresholds. The possible new areas of spread of P. pentagona in Turkiye were forecasted until the year 2098 by using HadGEM2-ES RCP4.5 and HadGEM2-ES RCP8.5 climate scenarios together with changes in generation time and positive intrinsic rate of increase of Mulberry scale. These values were obtained at different temperatures under laboratory conditions. The terrestrial annual average temperature grid data with 20 x 20 km resolution, obtained from Turkish State Meteorological Service, were deployed to create the projection maps. According to the results obtained, it is predicted that P. pentagona will be able to complete its development and would cause an outbreak in Black Sea, Eastern Anatolia, South-East Anatolia regions, where it could not develop or complete its generation in reference periods 1971-2000, until the year 2070. If the average temperature continues increase, it will not be possible for P. pentagona to develop on the Mediterranean and Aegean coasts, because high temperatures negatively affect reproductive capacity.
The Temperature-Dependent Development of Pseudaulacaspis Pentagona (Hemiptera: Diaspididae) on Morus Alba and Morus Nigra
(Springer, 2025) Dokuyucu, Oezden; Ozgokce, Mehmet Salih; Ulgenturk, Selma
Pseudaulacaspis pentagona Targioni-Tozzetti (Hemiptera: Diaspididae), is an important thermophilic, invasive, and polyphagous pest, especially of fruit trees. Here we report an investigation of physiological characters of P. pentagona that are important for predicting its phenology, including its development time at different temperatures, and its maximum, optimum, and minimum development thresholds. The research was conducted in 7 different temperatures (20.6, 23.2, 27.1, 29.0, 30.6, 31.3, 33.8 degrees C) on two mulberry species (Morus alba and M. nigra) in a climate chamber with fixed illumination regime (16: 8 h) and relative humidity (60 +/- 5%) conditions. The development times of P. pentagona nymphs under fixed conditions at above-given temperatures in ascending order were determined 33.49, 25.55, 18.63, 19.16, 21.99, and 24.84 days on M. alba while they were 32.85, 28.34, 20.98, 19.04, 19.66, and 24.99 days on M. nigra, respectively. The development threshold (C) and thermal constant (K) value of P. pentagona were calculated according to the Linear model as 12.48 degrees C and 272.526 day-degrees on M. alba, while 9.73 degrees C and 368.25 day-degrees on M. nigra, respectively. The minimum (Tmin), the optimum (Topt) and the maximum temperature (Tmax) requirements for the development of P. pentagona on these species were estimated with nonlinear models at a range of 14.15-16.5 degrees C, 27.5-28.3 degrees C, and 32.6-35.3 degrees C for M. alba, while 9.7-15, 28.2-29.7 and 32.4-37.3 for M. nigra species, respectively. The range in degree-days required for crawler emergence time of P. pentagona using the standard base temperature of 12.58 were estimated as 43-92 DD, 544-690 DD and 1120-1376 DD for first, second and third generation in three districts in Ankara, respectively. The results will provide information about the adaptation of P. pentagona to different geographical regions and climatic conditions and will also help determine the most effective application time in the control of this insect pest.