Browsing by Author "Ozgokce, Mehmet Salih"

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Advances in Theory, Data Analysis, and Application of the Age-Stage, Two-Sex Life Table for Demographic Research, Biological Control, and Pest Management
(E Schweizerbartsche verlagsbuchhandlung, 2023) Chi, Hsin; Kavousi, Aurang; Gharekhani, Gholamhossein; Atlihan, Remzi; Ozgokce, Mehmet Salih; Guncan, Ali; Desneux, Nicolas
This paper reviews and introduces innovative research pertaining to the age-stage, two-sex life table. The main topics discussed are: (1) Analysis of data involving group-reared life table studies. We address the rationale behind the data analysis used when constructing a group-reared life table. Proper analysis of grouped-reared life table data enables the collection of realistic and applicable data for ecological studies, devising efficient mass-rearing programs and formulating pest management routines using time-and labor-saving group-rearing methods. (2) The bootstrap-match technique. This novel technique is applicable to those instances when constructing a complete life table involves collecting the immature independently from the adult data. (3) Application of the set theory in life table research. This procedure enables a mathematical description of the population structure and bootstrap samples. (4) Application of the multinomial theorem. Using the multinomial theorem enables calculation of the exact probability of bootstrap samples. (5) Inclusion of infertile bootstrap samples. Because it is impossible to calculate the intrinsic rates of increase for infertile samples, they are normally omitted in life table analysis. Inclusion of these infertile bootstrap samples produces an unbiased life table analysis. (6) The Cartesian product. The Cartesian product of two sets produces the complete coverage of all possible differences. We compared the paired bootstrap test, the Cartesian paired test based on bootstrap results, and the Cartesian paired test based on the multinomial theorem. (7) Integration of life table data with predation data. This procedure, which is especially relevant to biological control programs, enables a comprehensive study of the predator-prey relationship. (8) Computer simulation based on life tables. Population projection based on the age-stage, two-sex life table not only provides the means to predict the dynamics of stage structures of a given pest population, but also provides an insight into the dynamics of predation capacity of the predator population. (9) Problems in life table research. Each of the subjects discussed is crucial for the theoretical advancement and practical applications of scientific demographic research.
Age-Stage, Two-Sex Life Table: an Introduction To Theory, Data Analysis, and Application
(E Schweizerbartsche verlagsbuchhandlung, 2020) Chi, Hsin; You, Minsheng; Atlihan, Remzi; Smith, Cecil L.; Kavousi, Aurang; Ozgokce, Mehmet Salih; Liu, Tong-Xian
The life table is a type of research tool that is frequently used in many studies involving population and community ecology. They are the basis for many comprehensive studies in pest management, pesticide resistance, predator-prey relationships, biological control, mass-rearing and harvesting of insects, plant resistance, etc. Because the morphology, physiology, survival, fecundity, and predation/consumption rate of most arthropods will vary significantly depending on their developmental stage and sex, precise description of stage differentiation and inclusion of both sexes are critical for attaining realistic and accurate life table analyses and correctly evaluating the overall fitness of populations. Since traditional female age-specific life tables ignore the male individuals in a population and are incapable of describing the unique and important feature of stage differentiation (i.e., metamorphosis) that is a defining characteristic of insects and mites, their application to data analysis involving these groups will inevitably result in miscalculations and limit the practical application of these life tables. On the other hand, the age-stage, two-sex life table (hereafter referred to as the two-sex life table whenever appropriate), can precisely delineate stage differentiation and includes both sexes in data analysis, description, and interpretation, and in practical applications. In this review, the problems of female age-specific life tables are examined, followed by a discussion of the advantages of using the two-sex life table. Finally, applications of the two-sex life table in various types of entomological research are discussed and accompanied by examples.
Bias Introduced by the Simplified Method for the Estimation of the Intrinsic Rate of Increase of Aphid Populations: a Meta-Analysis
(E Schweizerbartsche verlagsbuchhandlung, 2021) Saska, Pavel; Ozgokce, Mehmet Salih; Skuhrovec, Jiri; Atlihan, Remzi; Guncan, Ali; Zamani, Abbas Ali; Tuan, Shu-Jen
The intrinsic rate of increase, denoted as r or r(m), describes the rate of population growth. Simplified formulas for estimating r have been developed to reduce labour and avoid complicated computations. The aim of this paper was to demonstrate and quantify the systematic bias in estimates of the intrinsic rate of increase provided by the simplified method (Wyatt & White 1977) compared to the age-stage, two-sex life table theory using a set of independently collected aphid life tables and meta-analytical approaches. The factors behind the variation in the bias across the studies were also explored. We analysed 112 aphid life tables from 24 independent experiments. The simplified method provided significantly greater estimates of the intrinsic rate of increase than the age-stage, two-sex life table theory in 98 out of 112 life table studies, and the difference was, on average, 27.6 % (95% CI: 24.0-31.3 %). The magnitude of the log-ratio of the two approaches was positively influenced by the pre-reproduction mortality and by variations in the duration of the total pre-reproduction period within a cohort. We concluded that although using simplified methods may be appealing because it saves time during the data collection phase and analysis, researchers, reviewers and journal editors should critically evaluate whether using the simplified method(s) is worthwhile, taking into account that such data are inaccurate and potentially lead to false conclusions. Current advances in the life-table theory and computer capacity have eliminated the need for simplified methods in population ecology.
Control Effectiveness of Kaolin Clay and Neem on Agonoscena Pistaciae in Pistachio Orchards
(Mdpi, 2025) Dilmen, Halil; Ozgokce, Mehmet Salih; Kaplan, Cevdet; Kara, Hilmi
The pistachio psyllid (Agonoscena pistaciae) is a major pest threatening pistachio production in Siirt province, T & uuml;rkiye. This study evaluated the efficacy of a clay mineral, kaolin, and a botanical insecticide, neem extract, in managing this pest, aiming to reduce the reliance on chemical pesticides. Field experiments were conducted to compare the performance of these treatments with that of the synthetic insecticide spirotetramat SC 100 at various application rates. The results demonstrated that kaolin significantly reduced oviposition rates, achieving up to 100% deterrence, while neem extract exhibited substantial nymph mortality rates of up to 84.75%. These findings highlight the potential of mineral- and plant-based alternatives as effective components of integrated pest management strategies for pistachio psyllid control, offering sustainable and environmentally friendly solutions for minimizing economic losses and pesticide residues in pistachio production.
Demographic Characteristics of Paracoccus Marginatus on Papaya Fruit and Potato Tubers With an Innovative Method for Efficient Application of the Multinomial Theorem in Demographic Research
(E Schweizerbartsche verlagsbuchhandlung, 2024) Lin, Ling-Hong; Shi, Meng-Zhu; Chi, Hsin; Guncan, Ali; Ozgokce, Mehmet Salih; Atlihan, Remzi; Fu, Jian-Wei
The life table data of Paracoccus marginatus Williams and Granara de Willink reared on potato tubers and papaya fruit were collected and analyzed using the age-stage, two-sex life table. The preadult survival rate (sa = 0.61) and female adult longevity (28.6 d) on papaya fruit were significantly higher than in individuals reared on potato tubers (sa = 0.38 and 18.8 d). The female adult longevity was significantly longer than it was in male adults on both hosts. The net reproductive rate (R0 = 206.72 offspring/individual), intrinsic rate of increase (r = 0.1745 d-1) and finite rate of increase (lambda = 1.1912 d-1) of P. marginatus were significantly higher on papaya fruit than they were on potato tubers (R0 = 37.29 offspring/ individual, r = 0.1138 d-1, lambda = 1.1221 d-1). Population projection indicated that the total population size of P. marginatus on papaya fruit could reach 146,826 individuals after 60 days, while the total population size of P. marginatus on potato tubers would only be 3,619 individuals. This study showed that P. marginatus had a higher fitness on papaya fruit than on potato tubers. We also discuss an innovative method for applying the multinomial theorem in demographic analysis based on the multinomial coefficients and individual compositions. To facilitate the application of the multinomial theorem in life table research including both fertile and infertile bootstrap samples, we calculated the exact multinomial coefficients for all possible individual compositions. A file for a sample size of 15 individuals (file size 4.07 GB) is made available for public access at DOI: 10.5281/zenodo.11257789.
Demography and Population Projection of Myzus Persicae (Sulz.) (Hemiptera: Aphididae) on Five Pepper (Capsicum Annuum L.) Cultivars
(Springer, 2018) Ozgokce, Mehmet Salih; Chi, Hsin; Atlihan, Remzi; Kara, Hilmi
The green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae), is a major pest of pepper. In this study, we collected data on the development, survival, fecundity, and proportion of apterous and alate forms of green peach aphid reared on five commercial pepper cultivars (Amiral, Erciyes, Mert, Mertcan, and Naz) at 25 +/- 1 degrees C, 60 +/- 5% RH, and a photoperiod of 16:8 (L:D) h. We analyzed the life history raw data by using the age-stage, two-sex life table. The shortest development time (6.66 days) and highest fecundity (62.68 individuals) occurred on the Erciyes cultivar. The highest intrinsic rate of increase (r = 0.332 d(-1)), finite rate of increase (lambda = 1.394 d(-1)), net reproductive rate (R-0 = 62.7 offspring) and shortest mean generation time (T = 12.45 d) also occurred on the Erciyes cultivar; while the lower fitness occurred on the Amiral, Mertcan and Naz cultivars. Our results compared differences in the population growth rate of M. persicae on different pepper cultivars. This information will be useful to individuals working in pest management programs particularly those involving M. persicae.
Demography and Population Projection of Myzus Persicae (Sulz.) (Hemiptera: Aphididae) on Five Pepper (Capsicum Annuum L.) Cultivars (Vol 46, Pg 153, 2018)
(Springer, 2018) Ozgokce, Mehmet Salih; Chi, Hsin; Atlihan, Remzi; Kara, Hilmi
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.
The Effects of Different Charleston Pepper Cultivars on the Demographic Parameters and the Antioxidant Levels of Myzus Persicae (Sulzer, 1776) (Hemiptera: Aphididae)
(Entomological Soc Turkey, Ege Univ, 2023) Ozgokce, Mehmet Salih; Kusoglu, Duygu; Konus, Metin; Kara, Hilmi; Risvanli, Mehmet Ramazan; Cetin, Dogan
Host plant diversity causes differences in the biology and adaptation of insects. In this study, variations in some biological properties and adaptive antioxidative response of Myzus persicae (Sulzer,1776) (Hemiptera: Aphididae) on five Charleston pepper, Capsicum annuum L. (Solanaceae) cultivars were investigated under laboratory conditions (25 & PLUSMN;1 & DEG;C, 60 & PLUSMN;5% RH). The lowest intrinsic rate of increase (r = 0.193 d-1) of M. persicae was estimated in the tested cohort fed with the Kanyon cultivar, while the highest intrinsic rate of increase (r = 0.248 d-1) was found on the Tufan cultivar. The cohort fed with Safkan cultivar exhibited the highest levels of GST-CDNB and EST-PNPA at 562.80 and 207.64 nmol/mg protein, respectively, whereas the cohort fed with Kanyon cultivar showed the lowest levels at 317.04 and 132.14 nmol/mg protein, respectively. Analysis of life table parameters and enzymatic/non-enzymatic antioxidant levels of M. persicae showed that among the cultivars we tested, the Tufan cultivar was the most preferred host by M. persicae, while Kanyon cultivar was a less suitable host.
Farklı Aspir (Carthamus Tinctorius L.) Çeşitlerinin Laboratuvar Koşullarında Bazı Fizyolojik Parametrelerinin Belirlenmesi
(2022) Kıpçak, Selma; Kına, Esra; Ozgokce, Mehmet Salih; Sadak, Aynur
Bu çalışmada Türkiye’de son yıllarda yaygın olarak yetiştirilen farklı aspir çeşitlerinin laboratuvar koşullarında bazı fizyolojik parametreleri belirlenmiştir. Elde edilen veriler değerlendirildiğinde istatistiksel olarak Asol çeşidinde toplam fenol miktarının diğer çeşitlere göre daha düşük olduğu (81.33 mg/100g) bulunmuş, diğer çeşitlerde ise 273.00-392.44 mg arasında tespit edilmiştir. Şeker çeşitleri içinde Sakkaroz oranının Balcı çeşidinde 1.87 g ile en yüksek, Ayaz çeşidinde ise 0.82 g ile en düşük değerde saptanmıştır. Mineral maddeler içinden ise Fe miktarının 946.71 mg/kg ile en yüksek Ayaz çeşidinde bulunduğu belirlenmiştir. Ölçülen diğer fizyolojik parametrelerin ise çeşitler arasında istatistiksel olarak farklı olmadığı, ancak değerlerin antioksidan miktarlarının 16.58-24.97 µmol, Fruktoz miktarlarının 0.16-0.41 g/100 g, gluktoz miktarlarının 0.43-0.63 g/100 g, Ca içeriğinin %1.76-3.00, Cu miktarının 10.07-13.54 mg/kg, K, Mn ve Mg içeriklerinin sırasıyla %1.79-3.60, %96.37-105.33 ve %0.41-0.97 arasında değiştiği kaydedilmiştir.
Global Water Quality Changes Posing Threat of Increasing Infectious Diseases, a Case Study on Malaria Vector Anopheles Stephensi Coping With the Water Pollutants Using Age-Stage, Two-Sex Life Table Method
(Bmc, 2022) Fazeli-Dinan, Mahmoud; Azarnoosh, Mostafa; Ozgokce, Mehmet Salih; Chi, Hsin; Hosseini-Vasoukolaei, Nasibeh; Haghi, Farzad Motevalli; Hemingway, Janet
Background Water pollution due to uncontrolled release of chemical pollutants is an important global problem. Its effect on medically important insects, especially mosquitoes, is a critical issue in the epidemiology of mosquito-borne diseases. Methods In order to understand the effect of water pollutants on the demography of Anopheles stephensi, colonies were reared in clean, moderately and highly polluted water for three consecutive generations at 27 degrees C, 75% RH, and a photoperiod of 12:12 h (L:D). The demographic data of the 4th generation of An. stephensi were collected and analysed using the age-stage, two-sex life table. Results The intrinsic rate of increase (r), finite rate of increase (lambda), mean fecundity (F) and net reproductive rate (R-0) of An. stephensi in clean water were 0.2568 d(-1), 1.2927 d(-1), 251.72 eggs, and 109.08 offspring, respectively. These values were significantly higher than those obtained in moderately polluted water (r = 0.2302 d(-1), lambda = 1.2589 d(-1), 196.04 eggs, and R-0 = 65.35 offspring) and highly polluted water (r = 0.2282 d(-1), lambda = 1.2564 d(-1), 182.45 eggs, and R-0 = 62.03 offspring). Female adult longevity in moderately polluted (9.38 days) and highly polluted water (9.88 days) were significantly shorter than those reared in clean water (12.43 days), while no significant difference in the male adult longevity was observed among treatments. Conclusions The results of this study showed that An. stephensi can partially adapt to water pollution and this may be sufficient to extend the range of mosquito-borne diseases.
Impact of Beneficial Microorganisms Inoculated Cotton Plants on Spodoptera Exigua (Lepidoptera: Noctuidae)
(Entomological Soc Brasil, 2024) Kizilkan, Nurhan Didem; Konus, Metin; Risvanli, Mehmet Ramazan; Yilmaz, Can; Kara, Hilmi; Ozgokce, Mehmet Salih; Atlihan, Remzi
This study discusses plant-mediated effects of beneficial soil-borne microorganisms on population growth parameters of Spodoptera exigua (Lepidoptera: Noctuidae), a major cotton pest. In particular, we investigated the impact of these microorganisms on oxidative stress, chlorophyll content, and sugar and protein levels in cotton plants, and how these changes in the plant affect the survival, development, reproduction, and ultimately population growth of the pest. A longer preadult period, lower preadult survival rate, and lower reproduction were obtained for the pest cohort feeding on treated plants, which resulted in lower population parameters, i.e., intrinsic growth rate, finite growth rate, and net reproduction rate. The population projection results showed the same trend as the population parameters. These results can be attributed to the changes caused by microorganisms in the treated plants. There was no oxidative stress in the treated plants. Instead, the chlorophyll content in these plants increased, and the protein-carbohydrate ratio decreased. Additionally, we assessed the effects of plant-insect-microorganisms interaction on total glutathione levels, glutathione S-transferase, and esterase enzyme activities in S. exigua. Overall results indicate that beneficial microorganisms tested enhance the plant's ability to defend against the pest. Additionally, the findings from this study provide valuable insights into the complex interplay among plants, microorganisms, and pests, offering potential strategies for incorporating these interactions into pest management practices.
Innovative Application of Set Theory, Cartesian Product, and Multinomial Theorem in Demographic Research
(E Schweizerbartsche verlagsbuchhandlung, 2022) Chi, Hsin; Kara, Hilmi; Ozgokce, Mehmet Salih; Atlihan, Remzi; Guncan, Ali; Risvanli, Mehmet Ramazan
The bootstrap technique has been widely used to estimate the variances, standard errors, and confidence intervals (CI) of life table parameters, while the paired bootstrap test has been used to compare life table parameters between treatments by assessing the CI of differences. Although a great number of resamplings (B = 1,000 similar to 100,000) has been suggested for the application of the bootstrap technique, each computer simulation will generate different results because the bootstrap sampling with replacement is based on a stochastic process. In order to determine the theoretical and true confidence intervals of population parameters, and thereby, achieve an accurate assessment of differences between treatments, we introduce an innovative application of set theory, Cartesian product, and multinomial theorem for a mathematical formulation of demographic analysis. Moreover, when a bootstrap sample is composed of individuals that cannot produce offspring (i.e., an infertile bootstrap sample), the intrinsic rate of increase (r) and finite rate of increase (lambda) cannot be calculated. Omitting these infertile bootstrap samples will result in biased estimates. This problem of infertile bootstrap samples in demographic research has not been resolved. The integrated application of the set theory, Cartesian products, and multinomial theorem enables the detection of all possible combinations of bootstrap samples, the true CIs of population parameters, and the CIs of differences between treatments; furthermore, the probabilities of both fertile and infertile bootstrap samples can also be calculated. The life table data of the well-known cosmopolitan pest, Myzus persicae (Sulzer) (Hemiptera: Aphididac), were collected and used as examples.
The Insecticide Resistance Allele Kdr-His Has a Fitness Cost in the Absence of Insecticide Exposure
(Oxford Univ Press inc, 2018) Chi, Hsin; You, Minsheng; Atlihan, Remzi; Kavousi, Aurang; Ozgokce, Mehmet Salih; Tuan, Shu-Jen; Gokce, Ayhan
Investigation of the Effects of Physico-Chemical Environmental Conditions on Population Fluctuations of Notonecta Viridis Delcourt, 1909 (Hemiptera: Notonectidae) in Van Lake by Using Zero-Inflated Generalized Poisson Regression
(Entomological Soc Turkey, Ege Univ, 2011) Yesilova, Abdullah; Ozgokce, Mehmet Salih; Atlihan, Remzi; Karaca, Ismail; Ozgokce, Fevzi; Yildiz, Sukran; Kaya, Yilmaz
In ecological studies, it is a common situation occured that population density of species extremly increases or decreases in certain periods depending on many abiotic and biotic factors. Because of ecologial factors that cause high level fluctuation in population density, It is possible to get zero individual at samplings, and on the other hand, differences between maximum and minimum values obtained in different samplings intervals can be very high. Because this type of data based on counting does not show normal distribution, and shape of the distribution is skewed to the right because of the abundance of zero, using the Zero-inflated Poisson regression method (ZIGP) is required. This study was carried out to obtain information on effects of physico-chemical environmental conditions on population fluctuation of Notonecta viridis. Samplings were conducted with monthly periods along the coastal band of Van Lake in 2005-2006. Samples were taken from 20 sampling places where have three different characters as stream entrances, settlements and natural coastlines. Reults were analysed by using ZIGP regression model. According to results, Effect of sampling intervals and sampling stations on population densities of Notonecta viridis were important. On the other hand, HCO3 had negative effect on population densities in zero-inflated model while it had possitive effect on population densities in other two models. It was determined that Fe effected the species populations in the negative way in the mean regression model, and Cl and Mg effected it in possitive way in the overdispersion regression. In the result, it was deductived that Notonecta viridis was found excessive numbers or none in some sampling stations because of the pysico-chemical structures of water.
Life Table Characteristics of Orius Minutus (L.) (Hemiptera: Anthocoridae) Feeding on Bemisia Tabaci (Gennadius) (Hemiptera: Aleyrodidae) at the Laboratory Conditions
(Parlar Scientific Publications (p S P), 2015) Efe, Davut; Ozgokce, Mehmet Salih; Karaca, Ismail
In the study, life table of Orius minutus (L.) (Hemiptera: Anthocoridae) feeding on Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) was constructed at the laboratory conditions adjusted to 25 +/- 1 degrees C, 65 +/- 10 % relative humidity and 16 hours of artificial light. B. tabaci used as prey was reared on cotton plant at climatic chamber. As a result of the study, it was determined that total developmental period and mortality rate of O. minutus female and male were 19.80, 20.54 days and 23%, 24% respectively; longevity of O. minutus were 57.40 days for female and 29.98 days for male. Pre-oviposition, oviposition and postoviposition periods were 3.84, 34.20 and 19.00 days, respectively, daily egg numbers were 3.69 and total egg numbers were 180.97. Reproductive value reached the highest value at 5th days of oviposition period. Intrinsic rate of increase (r(m)) was 0.121 female/female/day, net reproductive rates (R-o) was 60.446 females/female, mean generation time (T-0) was 33.892 days, gross reproductive rate (GRR) was 78.684, doubling time (T-2) was 5.727 days and finite rate of increase (lambda) was 1.129. The most appropriate reproduction curve was calculated by Enkegaard equation and parameters were found as follows; a = 0.711 +/- 0.049; b = 0.09+/-10.004; R-2 = 0.926. Weibull distribution was used to determine the best curve showing survival rate for females and males of Onus minutus and parameters were found as follows; for females, b = 57.4+/-0.019, c= 2.26+/-0.007, R-2 = 0.818; for male, b = 31.67+/-0.014, c = 1.77+/-0.0.06, R-2 = 0.918.
Life Table of Aspidiotus Nerii Bouche (Hemiptera, Diaspididae) on Six Potato Varieties at the Laboratory Conditions
(Parlar Scientific Publications (p S P), 2019) Erol, Alime Bayindir; Ozgokce, Mehmet Salih; Karaca, Ismail
Aspidiotus nerii Bouche (Hemiptera, Diaspididae) is a polyphagous species and the host of many effective biological control agents. It has short generation time and produces on potato tubers easily. The oleander scale is commonly used at the mass production studies of many natural enemies. The most appropriate host plant selection to oleander scale is important for mass production studies. The life table is a good way to understand the population dynamic of an organism. In this study, the life table parameters of oleander scale on six potato varieties (Agria, Sante, Marabel, Granola, Vanba and Provento) were estimated by using the Euler-Lotka method at the climatic cabinets which have 25 degrees C constant temperature, 60 +/- 5% relative humidity and 16:8 hours light-dark periods. The life table parameters were calculated as follows: intrinsic rate of increase (r(m)), 0.049, 0.048, 0.045, 0.034, 0.046 and 0.026 females/female/day, net reproductive rates (R-0) 19.35, 18.52, 16.67, 8.31, 16.34 and 5.01 females/female, mean generation time (T-0) 61.15, 60.72, 62.20, 62.79, 60.79 and 62.66 days, gross reproductive rate (GRR) 30.53, 23.90, 20.85, 10.66, 31.76 and 19.72, doubling time (T-2) 14.31, 14.42, 15.32, 20.56, 15.08 and 26.96 days, finite rate of increase (lambda) 1.05, 1.05, 1.05, 1.03, 1.05 and 1.03 females/days, respectively.
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 Life Table of the Lucerne Beetle, Gonioctena Fornicata (Bruggem) (=phytodecta Fornicatus Bruggem) (Coleoptera, Chrysomelidae) on Alfalfa Under Laboratory Conditions
(Entomological Soc Turkey, Ege Univ, 2014) Efe, Davut; Ozgokce, Mehmet Salih
In this study, the life table of Gonioctena fornicate (Brugg.) was constructed at 25 +/- 1 degrees C constant temperature, 60 +/- 5% relative humidity and 16:8 light:dark period in a climate cabinet. Life table parameters were calculated using the Euler-Lotka iteration method and their values were: Intrinsic rate of increase (r(m)), 0.015; Net reproductive rate (R-0), 180.25 females/female; Mean generation time (T-0), 353.03 days; Gross reproductive rate (GRR), 287.93 females/female; using Doubling time, (T-2) 47.11 days and Finite rate of increase (lambda), 1.02 females/female. The fecundity rate was fitted in the Enkegaard equation and parameters were calculated as a = 0.886 +/- 0.055; b = 0.052 +/- 0.002. Mean development times using for both sexes were: egg, 5.07, 2.85 days; larvae1, 2.83, 2.72 days; larvae2, 2.10, 2.36 days; larvae3, 2.15, 2.29 days; larvae4, 4.46, 4.29 days; pupae, 7.92, 7.69 days; total development time, 24.40, 24.32 days for females and males, respectively. Additionally, using preoviposition, oviposition, postoviposition and generation times were 305.53, 32.73, 30.07 and 331.60 days, respectively. Life span of females was 366.07 days and it was 371.7 days for males. The best survivership curve was fitted to the Weibull distribution; its shape was defined as a Type l survivorship pattern and the calculated parameters were: b = 382.14 +/- 0.429 and c = 11.34 +/- 0.231.
Life Tables and Predation Rates of Hippodamia Variegata (Goeze) and Adalia Fasciatopunctata Revelieri (Mulstant) (Coleoptera: Coccinellidae) on Aphis Fabae (Scopoli) (Hemiptera: Aphididae)
(Springer, 2025) Bas, Furkan Harun; Ozgokce, Mehmet Salih
Predation rates, reproduction, development, and life table parameters of Hippodamia variegata (Goeze) and Adalia fasciatopunctata revelieri (Mulstant) (Coleoptera: Coccinellidae) on black bean aphid, Aphis fabae (Scopoli) (Hemiptera: Aphididae), which causes significant losses in broad bean, Vicia faba (L.) (Fabaceae) plants, were determined according to the age-stage, two-sex life table. The experiments were carried out in a climate room with a temperature of 25 +/- 1 degrees C, 60 +/- 5% RH, and 16: 8 h light: dark conditions. The life table parameters of the predators were as follows; H. variegata and A. fasciatopunctata revelieri the intrinsic rate of increase (r) 0.18 +/- 0.09 day-1 and 0.15 +/- 0.01 day-1, the finite rate of increase (lambda) 1.20 +/- 0.01 day-1 and 1.16 +/- 0.02 day-1, the net reproduction rate (R0) 210.83 +/- 53.05 and 66.54 +/- 23.06 individuals, mean generation time (T) 29.33 +/- 0.54 and 27.92 +/- 1.55 days respectively. The net predation rate (C0) of H. variegata and A. fasciatopunctata revelieri on A. fabae were 1075.14 +/- 95.28 and 436.23 +/- 80.19 aphids respectively. As a result of the evaluation of the reproduction, development, life table, predation rates, and predation parameters of the predators, the effectiveness of both predators on pests was proved and it was revealed that H. variegata was a more effective predator on A. fabae than A. fasciatopunctata revelieri.