Yazar "Chi H." seçeneğine göre listele
Listeleniyor 1 - 13 / 13
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Age-stage, two-sex life table: The basis of population ecology, biological control and pest management [Yaş ve döneme özgü, iki eşeyli yaşam çizelgesi: Populasyon ekolojisi, biyolojik savaş ve zararlı yönetiminin temeli](Centenary University, 2018) Atlihan R.; Özgökçe M.S.; Chi H.Because they are capable of providing an integrated and comprehensive description of numerous biological parameters (survival, development, fecundity, etc.) of a population, life tables are one of the most powerful tools available for biologists and other researchers conducting research on population ecology, biological control, and pest management. Since the traditional female age-specific life tables ignore the male population and stage differentiation, their use often results in errors and inaccuracies. This article was prepared to discuss the reasons and advantages of using the age-stage, two-sex life table. © 2018, Centenary University. All rights reserved.Öğe Correction to: Demography and population projection of Myzus persicae (Sulz.) (Hemiptera: Aphididae) on five pepper (Capsicum annuum L.) cultivars (Phytoparasitica, (2018), 46, 2, (153-167), 10.1007/s12600-018-0651-0)(Springer Netherlands, 2018) Özgökçe M.S.; Chi H.; Atlıhan R.; Kara H.Following publication of the above article (https://doi. org/10.1007/s12600-018-0651-0) Phytoparasitica (First Online: 20 February 2018), the following errors were found: – Page 4: Right column, the fourth line beneath Eq. (12): “Eq. 3 can be written as” should be corrected to “Eq. 5 can be written as”. – Page 4: Left column, the second line beneath Eq. (13): “Eq. 11 can be simplified to” should be corrected to “Eq. 13 can be simplified to”. – Page 4: Left column, the third line beneath Eq. (14): The term (Formula presented.). Page 8: Right column, the last paragraph: There are five “intrinsic rate”. They should be corrected to “finite rate”. Page 8: Right column, the sixth line in last paragraph: “ascendin” should be corrected to “ascending”. The ninth line: “normal” should be corrected to “frequency”. Page 9: First line: “Fig. 3” should be corrected to “Fig. 4”. – Page 9: Left column, the sixth line in the last paragraph: “Fig. 3” should be corrected to “Fig. 4”. – Page 10: In the figure caption: “Fig. 4” should be corrected to “Fig. 5”. – Page 11: First line: “Fig. 5” should be corrected to “Fig. 6”. Page 12: First line: “Fig. 6. The total population size of Myzus persicae on different pepper cultivars.” should be corrected to “Fig. 3. Top figure: The 200,000 finite rates ordered according to original bootstrap order (x-axis). The 200,000 finite rates fluctuated randomly around the mean. Middle figure: The 200,000 finite rates sorted in ascending order. Bottom figure: The 200,000 finite rates shown as a frequency distribution. The 0.025 and 0.975 percentiles of finite rates can be obtained from the middle or bottom figures.” The authors wish to apologize for the errors within this article. © 2018, Springer Science+Business Media B.V., part of Springer Nature.Öğe Demographic analysis of arrhenotokous parthenogenesis and bisexual reproduction of Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae)(Nature Publishing Group, 2018) Ding T.; Chi H.; Gökçe A.; Gao Y.; Zhang B.Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) is a serious pest that is capable of bisexual and arrhenotokous reproduction. In arrhenotokous reproduction, virgin females initially produce male offspring; later, when their sons are sexually mature, the mothers begin bisexual reproduction by carrying out oedipal mating with their sons. Because a virgin female produces many male offspring before oedipal mating occurs, multiple oedipal mating is common. In this study, we investigated the effect of multiple oedipal mating on the population growth of F. occidentalis by using the age-stage, two-sex life table theory. In the arrhenotokous cohorts, all unfertilized eggs developed into males. In the bisexual cohorts, the offspring sex ratio was significantly female biased with the mean number of female offspring and male offspring being 72.68 and 29.00, respectively. These were the same as the net reproductive rate of female offspring and male offspring. In arrhenotokous cohorts, the number of males available for oedipal mating significantly affected the production of female offspring. The number of female offspring increased as the number of sons available for oedipal mating increased. Correctly characterizing this unique type of reproduction will provide important information for predicting the timing of future outbreaks of F. occidentalis, as well as aiding in formulating successful management strategies against the species. © 2018, The Author(s).Öğe Demography and mass rearing of the medicinal blister beetle epicauta impressicornis (Pic) (Coleoptera: Meloidae) at Different Temperatures(Oxford University Press, 2018) Liu Y.-Y.; Li G.-Y.; Yang L.; Chi H.; Chen X.-S.The population dynamics of the blister beetle, Epicauta impressicornis (Pic) (Coleoptera: Meloidae) had been investigated from 2014 to 2016 in field. The results showed that E. impressicornis is univoltine and overwintered in the fifth instar in the Luodian area of Guizhou, China. The biological and ecological characteristic of the beetle were analyzed at six temperatures (i.e., 21, 24, 27, 30, 33, and 36°C) in the laboratory using the age-stage, two-sex life table. The developmental duration, longevity, and total preoviposition period were significantly shortened with increases in temperatures. The adult preoviposition periods at 24, 27, and 30°C were significantly longer than at other temperatures, while the fecundities at 27 and 30°C were significantly higher than at other temperatures. Life expectancy (? xj ) decreased with age and the reproductive value (v xj ) increased with age. The intrinsic rate of increase (r = 0.0921 d -1 ) and finite rate (? = 1.0965 d -1 ) were the highest at 33°C, followed by 30°C (r = 0.0758 d -1 , ? = 1.0788 d -1 ). Although the net reproductive rate (R 0 = 17.63 offspring) was the lowest at 36°C, the values of r (0.0724 d -1 ) and ? (1.0751 d -1 ) were higher at 36°C than those at 21, 24, and 27°C. Our analysis for a mass-rearing system showed the most efficient and economical strategy would be to rear E. impressicornis at 30-33°C. © The Author(s) 2018. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved.Öğe Demography and population projection of Myzus persicae (Sulz.) (Hemiptera: Aphididae) on five pepper (Capsicum annuum L.) cultivars(Springer Netherlands, 2018) Özgökçe M.S.; Chi H.; Atlıhan R.; Kara H.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°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 (? = 1.394 d-1), net reproductive rate (R0 = 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. © 2018, Springer Science+Business Media B.V., part of Springer Nature.Öğe Demography and uncertainty of population growth of conogethes punctiferalis (Lepidoptera: Crambidae) reared on five host plants with discussion on some life history statistics(Oxford University Press, 2018) Chen G.-M.; Chi H.; Wang R.-C.; Wang Y.-P.; Xu Y.-Y.; Li X.-D.; Zheng F.-Q.The development, survival, and fecundity data of Conogethes punctiferalis (Guenée) (Lepidoptera: Crambidae) reared on chestnut (Castanea mollissima Blume), maize (Zea mays L.), sunflower (Helianthus annuus L.), hawthorn (Crataegus pinnatifida Bunge), and apple (Malus domestica Miller) were collected at 25 ± 1°C and 70 ± 5% RH. Raw data were analyzed and compared by using the age-stage, two-sex life table. The mean fecundity (F) was the highest (282.3 eggs per female) when larvae were reared on chestnut. The lowest mean fecundity (19.2 eggs per female) occurred on apple. The net reproductive rates (R 0) were 134.52, 106.77, 30.29, 27.61, and 8.63 offspring on chestnut, maize, sunflower, hawthorn, and apple, respectively. The intrinsic rates of increase (r) were 0.1359, 0.1326, 0.0807, 0.0811, and 0.0448 d -1 on chestnut, maize, sunflower, hawthorn, and apple, respectively. Computer projections based on the age-stage, two-sex life table revealed the stage structure and variability of the population growth of C. punctiferalis. Our results demonstrated that although chestnut and maize were the most suitable host plants for C. punctiferalis, the moths were also able to develop and reproduce on sunflower, hawthorn, and apple. © The Author(s) 2018. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved.Öğe Effects of spirodiclofen on life history traits and population growth of a spider mite predator Oligota flavicornis (Coleoptera: Staphyllinidae) based on the age-stage two-sex life table theory(John Wiley and Sons Ltd, 2019) Lin T.; You Y.; Zeng Z.-H.; Chen Y.-X.; Chi H.; Xia J.-M.; Wei H.BACKGROUND: Knowledge of the compatibility between spirodiclofen and the predator Oligota flavicornis is an important aspect for the management of spider mites. RESULTS: We used the age-stage, two-sex life table to assess the effects of spirodiclofen on the life history traits and population growth of O. flavicornis. At the maximum recommended concentration (60 mg a.i. L -1 ) and also at twice the maximum recommended dosage (120 mg a.i. L -1 ), the preadult stages of O. flavicornis were significantly lengthened, while the adult longevity and fecundity decreased significantly. The finite rate (?), intrinsic rate of increase (r), and net reproduction rate (R 0 ) decreased, while the mean generation time (T) was longer after both the 60 and 120 mg a.i. L -1 treatments than it was in the control and 30 mg a.i. L -1 treatments. Life expectancy and reproductive value were higher in the control and 30 mg a.i. L -1 treatment than in the 60 and 120 mg a.i. L -1 treatments; the two higher concentrations were detrimental to the development of O. flavicornis. CONCLUSION: A proper combination of the O. flavicornis and spirodiclofen to control the spider mite, while avoiding the side effect of spirodiclofen, could be achieved based on the knowledge of life tables. © 2018 Society of Chemical Industry. © 2018 Society of Chemical IndustryÖğe Effects of Tomato chlorosis virus on the performance of its key vector, Bemisia tabaci, in China(Blackwell Publishing Ltd, 2018) Li J.; Ding T.B.; Chi H.; Chu D.Tomato chlorosis virus (ToCV), which is a newly emerged and rapidly spreading plant virus in China, has seriously reduced tomato production and quality over the past several years. In this study, the effect of ToCV on the demography of the whitefly, Bemisia tabaci biotype Q (Hemiptera: Aleyrodidae), fed on infected and healthy tomato plants was evaluated using the age-stage, two-sex life table. When reared on ToCV-infected tomato plants, the fecundity, length of oviposition period and female adult longevity of B. tabaci biotype Q decreased significantly, while the pre-adult duration significantly increased compared to controls reared on healthy tomatoes. Consequently, the intrinsic rate of increase (r) and finite of increase (?) of B. tabaci biotype Q on ToCV-infected tomato plants significantly decreased compared to those on healthy tomatoes. Population projection predicted that a population of B. tabaci biotype Q fed on ToCV-infected tomatoes increases slower than on healthy plants. These findings demonstrated that ToCV infection decreased the performance of B. tabaci biotype Q on tomato plants. © 2017 Blackwell Verlag GmbHÖğe Öğe Linking Demography and Consumption of Henosepilachna vigintioctopunctata (Coleoptera: Coccinellidae) Fed on Solanum photeinocarpum (Solanales: Solanaceae): With a New Method to Project the Uncertainty of Population Growth and Consumption(2018) Huang H.-W.; Chi H.; Smith C.L.Because life tables are capable of providing the most comprehensive description on the survival, stage differentiation, and the reproduction of animal populations, they can be considered as the bases of population ecology and pest management. Researchers concerned with studies involving life tables inevitably face the problem of describing the variabilities that occur in the survival, stage differentiation, and fecundity data. Finding a means to include these variabilities in population projections concerning pest management may be problematic. Henosepilachna vigintioctopunctata (F.) (Coleoptera: Coccinellidae) is a pest of many plant species in Asia, including cultivated crops, ornamentals, and wild plants. The raw life history data (survival, stage differentiation, and fecundity) and consumption rate of both sexes of H. vigintioctopunctata reared on Solanum photeinocarpum Nakamura et Odashima (Solanales: Solanaceae) were collected in the laboratory and analyzed based on the age-stage, two-sex life table theory. The intrinsic rate of increase (r), finite rate of increase (?), net reproductive rate (R0), mean generation time (T), and net consumption rate (C0) of H. vigintioctopunctata were 0.1312 d-1, 1.1402 d-1, 603.5 offspring, 48.8 d, and 77.8 cm2, respectively. By using the bootstrap technique with 100,000 samples, we demonstrated that the life tables constructed based on the 2.5th and 97.5th percentiles of R0 and ? can be used to describe the variabilities found in the survival and fecundity curves and to project the uncertainty of population growth. © The Author(s) 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.Öğe Response to short-term cold storage for eggs of agasicles hygrophila (coleoptera: Chrysomelidae), a biological control agent of alligator weed alternanthera philoxeroides (caryophyllales: Amaranthaceae)(Oxford University Press, 2018) Liu Y.-H.; Jia D.; Yuan X.-F.; Wang Y.-X.; Chi H.; Ridsdill-Smith T.J.; Ma R.-Y.The alligator weed flea beetle, Agasicles hygrophila Selman & Vogt (Coleoptera: Chrysomelidae) has been used very successfully for the biological control of the widely-distributed invasive weed Alternanthera philoxeroides (Mart.) Griseb (Caryophyllales: Amaranthaceae). In order to extend the 'shelf life' of natural enemies released in biological control programs, cold storage has proven to be a valuable commercial procedure. To determine a suitable low temperature for storage of A. hygrophila, we conducted short-term cold storage treatments of eggs (4°C for 0.5, 1, 2, 5 d, and 7.5, 10, 15°C for 5 d and a control of 25°C; all eggs were returned to 25°C after the treatments). We evaluated the effects of these treatments on the subsequent fitness of the populations based on a demographic analysis using group-reared age-stage two-sex life tables. For 5 d storage, temperatures below 10°C had lethal effects, which were also observed at 4°C for 2 d storage. Storage at 4°C for 0.5 d did not affect the fitness of A. hygrophila, but it did not prolong the developmental time. Storage at 10°C for 5 d significantly decreased rates of population increase compared with 25°C. A. hygrophila stored at 15°C for 5 d had similar age-(stage) specific survival rates, rates of population increase, increased longevity and reproductive capability to the controls at 25°C. It is concluded that there were no significant fitness costs after 5 d storage at 15°C, which is therefore potentially a suitable storage temperature for A. hygrophila eggs. © The Author(s) 2018. Published by Oxford University Press on behalf of Entomological Society of America.Öğe Toxicity and Sublethal Effects of Flupyradifurone, a Novel Butenolide Insecticide, on the Development and Fecundity of Aphis gossypii (Hemiptera: Aphididae)(Oxford University Press, 2019) Liang P.-Z.; Ma K.-S.; Chen X.-W.; Tang C.-Y.; Xia J.; Chi H.; Gao X.-W.The cosmopolitan pest Aphis gossypii (Glover) causes considerable economic losses on various crops by its feeding damage and transmitting diseases around the world. Flupyradifurone is a novel butenolide pesticide; its toxicity on A. gossypii parent generation (F0) was estimated following treatment with LC 25 concentration for 48 h. The adult longevity and fecundity of the F0 individuals treated by flupyradifurone showed no significant decrease in comparison with the control. Life table method was used to evaluate the sublethal effects on progeny population (F1). Results showed that the development time of the fourth instar and the preadult as well as the total pre-reproductive period were significantly prolonged, while their fecundity was significantly decreased compared with the control. Additionally, the intrinsic rate of increase (r), the finite rate of increase, and the net reproductive rate (R 0) of F1 were all significantly lower in the group treated by LC 25 than in the control group. These results reveal that the sublethal concentration of flupyradifurone could suppress the population growth of A. gossypii and indicate that this novel insecticide may be as a useful tool in pest management. © The Author(s) 2018. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved.Öğe Transgenerational hormetic effects of sublethal dose of flupyradifurone on the green peach aphid, Myzus persicae (Sulzer) (Hemiptera: Aphididae)(Public Library of Science, 2019) Tang Q.; Ma K.; Chi H.; Hou Y.; Gao X.Both inhibitory and stimulatory (known as hormesis) effects of the sublethal flupyradifurone, a butenolide insecticide, on Myzus persicae Sulzer (Hemiptera: Aphididae) were investigated for incorporating it into integrated pest management (IPM). A leaf-dip bioassay showed that flupyradifurone was very toxic against adult M. persicae with a 48 h LC 50 of 8.491 mg/L. Using the age-stage two-sex life table approach, we assessed the effects of LC 25 of flupyradifurone on adult M. persicae and its progeny (F 1 and F 2 ). On the one hand, aphids exposed to flupyradifurone had significantly negative effects on the life history traits acrossing the generations, such as reduced the adult longevity and fecundity of F 0 , shortened the duration of third instar and fourth instar nymphs, preadult period and the pre-reproductive period of F 1 , and decreased the reproductive days and adult longevity of F 2 . On the other hand, stimulatory effects on the duration of pre-adult, adult reproductive days, and reproduction of F 1 were observed in the flupyradifurone-treated aphids. Consistently with the stimulation on individual traits, a higher net reproductive rate (R 0 ) of F 1 and a shorter mean generation time (T) of F 2 were observed in the flupyradifurone-treated aphids, although the other population parameters including the intrinsic rate of increase (r), finite rate of increase (?) and T of F 1 and R 0 , r and ? of F 2 were not significantly affected. These results revealed that adult M. persicae exposed to sublethal concentration of flupyradifurone can induce hormetic effects on F 1, and also cause negative effects on F 2 . Our results would be useful for assessing the overall effects of flupyradifurone on M. persicae and the hormetic effects should take into consideration when use flupyradifurone for control M. persicae. © 2019 Tang et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
