Browsing by Author "Dokuyucu, Oezden"

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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.
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.