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Articles de revues sur le sujet « Diapause »

Auteur : Grafiati

Publié le 4 juin 2021

Mis à jour le 26 juillet 2025

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1

Gillespie, D. R., and D. M. J. Quiring. "Effects of photoperiod on induction of diapause in Feltiella acarisuga (Diptera: Cecidomyiidae)." Canadian Entomologist 134, no. 1 (2002): 69–75. http://dx.doi.org/10.4039/ent13469-1.

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AbstractLarvae of the predatory gall midge Feltiella acarisuga (Vallot) diapaused as prepupae in tightly woven, brown, silk cells on leaf surfaces. Photoperiod alone, at day lengths from 16 to 8 h did not induce diapause at either 20 or 25 °C. A low incidence of diapause was induced by a combined photoperiod and thermoperiod of an 8-h day at 25 °C and a 16-h night at 15 °C. The incidence of diapause was higher under these conditions if the larvae were fed diapausing spider mites, Tetranychus urticae (Koch) (Acari: Tetranychidae). Because F. acarisuga only diapauses at daylengths equivalent to

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Polańska, Marta Anna, and Magdalena Bartnicka-Łyżwa. "Diapauza u owadów, fenomen umożliwiający przetrwanie trudnych warunków środowiska." Kosmos 72, no. 3 (2022): 325–39. http://dx.doi.org/10.36921/kos.2022_2906.

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Aby przetrwać niekorzystne, występujące cyklicznie w ciągu roku warunki środowiska, owady wytworzyły różne mechanizmy adaptacyjne. Jednym z nich jest diapauza, szeroko rozpowszechniona, pozwalająca przetrzymać krytyczny okres oraz zsynchronizować rozwój i procesy rozrodcze do warunków panujących w środowisku. Diapauza może być zjawiskiem obligatoryjnym występuje w każdym pokoleniu, niezależnie od warunków w jakich żyją owady, lub fakultatywna, pojawiające się tylko w odpowiedzi na zmiany natężenia określonych czynników. Głównymi induktorami diapauzy są fotoperiod, temperatura, wilgotność, zagę

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Jiang, Ting, Yulin Zhu, Yingchuan Peng, Wanna Zhang, and Haijun Xiao. "Universal and differential transcriptional regulatory pathways involved in the preparation of summer and winter diapauses in Pieris melete." Bulletin of Entomological Research 111, no. 3 (2021): 371–78. http://dx.doi.org/10.1017/s0007485321000018.

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AbstractMuch progress has been made in understanding the environmental and hormonal systems regulating winter diapause. However, transcriptional regulation of summer diapause is still largely unknown, making it difficult to understand an all-around regulation profile of seasonal adaptation. To bridge this gap, comparison RNA-seq to profile the transcriptome and to examine differential gene expression profiles between non-diapause, summer diapause, and winter diapause groups were performed. A total number of 113 million reads were generated and assembled into 79,117 unigenes, with 37,492 unigen

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Galka, Brian E., and Reinhart A. Brust. "The effect of temperature and photoperiod on the induction of larval diapause in the mosquito Aedes togoi (Theobald) (Diptera: Culicidae)." Canadian Journal of Zoology 65, no. 9 (1987): 2262–65. http://dx.doi.org/10.1139/z87-341.

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Aedes togoi (Theobald) from Vancouver, B.C., may enter diapause in either the egg or larval stage. Larval diapause occurred in the fourth instar, when immatures were maintained at 16 °C or less, at photoperiods shorter than 12 h light/day. The critical photoperiod was calculated as 10.9L:13.1D at 16 °C. Larvae that failed to pupate after 40 days following hatching were recorded as being in diapause. At light periods greater than 12 h at 16 °C, there was no larval diapause and, at 14 °C, 100% of the larvae diapaused at 10L:14D. Temperatures of 18 °C or higher, at 10L:14D, prevented larval diapa

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Chalar, Cora, Graciela Clivio, Jimena Montagne, et al. "Embryonic developmental arrest in the annual killifish Austrolebias charrua: A proteomic approach to diapause III." PLOS ONE 16, no. 6 (2021): e0251820. http://dx.doi.org/10.1371/journal.pone.0251820.

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Diapause is a reversible developmental arrest faced by many organisms in harsh environments. Annual killifish present this mechanism in three possible stages of development. Killifish are freshwater teleosts from Africa and America that live in ephemeral ponds, which dry up in the dry season. The juvenile and adult populations die, and the embryos remain buried in the bottom mud until the next rainy season. Thus, species survival is entirely embryo-dependent, and they are perhaps the most remarkable extremophile organisms among vertebrates. The aim of the present study was to gather informatio

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Pokhrel, Narayan, Olga Genin, Dalit Sela-Donenfeld, and Yuval Cinnamon. "HREM, RNAseq and Cell Cycle Analyses Reveal the Role of the G2/M-Regulatory Protein, WEE1, on the Survivability of Chicken Embryos during Diapause." Biomedicines 10, no. 4 (2022): 779. http://dx.doi.org/10.3390/biomedicines10040779.

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Avian blastoderm can enter into diapause when kept at low temperatures and successfully resume development (SRD) when re-incubated in body temperature. These abilities, which are largely affected by the temperature and duration of the diapause, are poorly understood at the cellular and molecular level. To determine how temperature affects embryonic morphology during diapause, high-resolution episcopic microscopy (HREM) analysis was utilized. While blastoderms diapausing at 12 °C for 28 days presented typical cytoarchitecture, similar to non-diapaused embryos, at 18 °C, much thicker blastoderms

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Fangsen, Xue, and H. G. Kallenborn. "Control of summer and winter diapause in Pidorus euchromioides (Lepidoptera: Zygaenidae) on Chinese sweetleaf Symplocos chinensis." Bulletin of Entomological Research 88, no. 2 (1998): 207–11. http://dx.doi.org/10.1017/s0007485300025773.

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AbstractPidorus euchromioides Walker has two separate diapauses during its life cycle, a winter diapause as a fourth larval instar and a summer diapause as a prepupa in a cocoon. Winter diapause was induced by short photoperiods. The critical day length of 13 h 20 min to 13 h 40 min at 23.3°C under insectary conditions was very similar to the critical day length (13 h 32 min) observed in the field. Sensitivity to day length was restricted to the first 9 days, corresponding to the first and second instars. The duration of larval diapause was not only strongly correlated with the inducing photop

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Naess, Tore, Jens Petter Nilssen, and Reidar Demmo. "Individual lake characteristics modify the life cycle and diapause habitat of two neighbouring populations of the cyclopoid copepod Thermocyclops oithonoides." Canadian Journal of Zoology 71, no. 8 (1993): 1663–72. http://dx.doi.org/10.1139/z93-233.

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Thermocyclops oithonoides (Cyclopoida, Copepoda) populations were studied in two neighbouring lakes with similar seasonal hydrographical characteristics. The two populations showed different life-cycle and diapause characteristics. The major differences were found in the number of generations per year (three versus two), the timing of induction and termination of diapause, temperature and oxygen conditions during diapause migration to the sediment, and habitat selection for wintering. Diapause initiation occurred at about 12 h light: 12 h dark in one population, but about 8 h L: 16 h D in the

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PALOMARES-RIUS, JUAN E., JOHN T. JONES, PETER J. COCK, PABLO CASTILLO, and VIVIAN C. BLOK. "Activation of hatching in diapaused and quiescent Globodera pallida." Parasitology 140, no. 4 (2012): 445–54. http://dx.doi.org/10.1017/s0031182012001874.

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SUMMARYThe potato cyst nematodes (PCN) Globodera pallida and G. rostochiensis are major pests of potatoes. The G. pallida (and G. rostochiensis) life cycle includes both diapause and quiescent stages. Nematodes in dormancy (diapause or quiescent) are adapted for long-term survival and are more resistant to nematicides. This study analysed the mechanisms underlying diapause and quiescence. The effects of several compounds (8Br-cGMP, oxotremorine and atropine) on the activation of hatching were studied. The measurements of some morphometric parameters in diapaused and quiescent eggs after exposu

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Hegazi, Esmat, W. E. Khafagi, A. Abou Zeid, et al. "Preliminary Evaluation of Diapause Intensity in Phytomyza orobanchia Kalt. (Diptera, Agromyzidae) in Faba Bean Vicia faba Fields in Alexandria, Egypt." Advances in Image and Video Processing 12, no. 3 (2024): 207–14. http://dx.doi.org/10.14738/aivp.123.17089.

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This study was carried out to evaluate the diapause intensity in Phytomyza orobanchia Kalt. (Diptera, Agromyzidae) in faba bean fields in Alexandria, Egypt. Several visits were carried out in faba bean seasons of 2021 and 2022 during January, February, March and April (cool to warm temperature) to collect spicks from faba bean fields infested by Orobanche crenata Forsk (Orobanchaceae). The spicks were dissected under binocular microscope and inspected for Ph.orobanchia puparia. Total of 6663 and 2810 Ph.orobanchia puparia were collected throughout the 1st and 2nd seasons, respectively. Ph.orob

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Hegazi, Esmat, W. E. Khafagi, A. Abou Zeid, et al. "Preliminary Evaluation of Diapause Intensity in Phytomyza orobanchia Kalt. (Diptera, Agromyzidae) in Faba Bean Vicia faba Fields in Alexandria, Egypt." Archives of Business Research 12, no. 5 (2024): 61–68. http://dx.doi.org/10.14738/abr.125.16900.

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This study was carried out to evaluate the diapause intensity in Phytomyza orobanchia Kalt. (Diptera, Agromyzidae) in faba bean fields in Alexandria, Egypt. Several visits were carried out in faba bean seasons of 2021 and 2022 during January, February, March and April (cool to warm temperature) to collect spicks from faba bean fields infested by Orobanche crenata Forsk (Orobanchaceae). The spicks were dissected under binocular microscope and inspected for Ph.orobanchia puparia. Total of 6663 and 2810 Ph.orobanchia puparia were collected throughout the 1st and 2nd seasons, respectively. Ph.orob

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Hansen, J. D., M. A. Watkins, M. L. Heidt, and P. A. Anderson. "Cold Storage to Control Codling Moth Larvae in Fresh Apples." HortTechnology 17, no. 2 (2007): 195–98. http://dx.doi.org/10.21273/horttech.17.2.195.

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Codling moth [Cydia pomonella (Lepidoptera: Tortricidae)], found in exported apples (Malus sylvestris), can disrupt international markets. Cold storage at 1.1 °C was examined for possible control of three physiological larval states in ‘Fuji’ apples: diapausing (overwintering), diapause-destined, and nondiapausing. All nondiapausing larvae were dead within 12 weeks, diapaused-destined larvae were controlled by the seventh week, yet more than half of the original populations of diapausing larvae were still alive after 11 weeks. Because the diapaused-destined larvae were younger than the nondiap

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Vinogradova, E. B., and S. Ya Reznik. "Interactions of photoperiod and thermorhythm in the induction of larval diapause in the blowfly, Calliphora vicina R.-D. (Diptera: Calliphoridae)." Proceedings of the Zoological Institute RAS 318, no. 1 (2014): 3–11. http://dx.doi.org/10.31610/trudyzin/2014.318.1.3.

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Laboratory experiments were conducted with a strain of Calliphora vicina originated from individuals collected in the environs of St. Petersburg, Russia. Females developed and were kept at 20° C under short day length of 12 h, their progeny developed at the same photoperiod but at different temperature regimes. At 12° C most of the larvae entered diapause, at 15° С about 50 % of the larvae diapaused, and at 18° C diapause was not observed. Thermorhythm (alternation of 12-h-long periods with temperatures of 12 and 18° C) induced diapause in approximately a third of individuals, regardless of wh

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Spence, John R. "The habitat templet and life history strategies of pond skaters (Heteroptera: Gerridae): reproductive potential, phenology, and wing dimorphism." Canadian Journal of Zoology 67, no. 10 (1989): 2432–47. http://dx.doi.org/10.1139/z89-344.

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Reproductive traits, diapause, and wing dimorphism of four pond skater species occurring in central Alberta, Canada, are explained as adaptive responses to a complex of habitat features. Species using temporary habitats had greater fecundity, but habitat permanence alone was a poor predictor of reproductive longevity, preoviposition period, or reproductive rate. Fecundity and longevity were significantly lower and more variable in direct than in diapaused breeders. There was no geographical or annual variation in fecundity, suggesting that values observed are good measures of reproductive pote

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Iwamoto, A., Y. Egi, and K. Sakamoto. "Exposing Larvae to Night Lighting Inhibits Embryonic Diapause in the Next Generation in the Domestic Silkworm, <i>Bombyx mori</i>." Journal of Scientific Research 16, no. 2 (2024): 575–78. http://dx.doi.org/10.3329/jsr.v16i2.69897.

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The domestic silkworm (Bombyx mori) is reared under controlled environments. Therefore, silkworms may be exposed at night to light used by humans working or living nearby. Artificial light at night (LAN) disturbs natural lighting cycles and negatively affects insect physiology, behavior, and ecology in the field. However, the effects of dim LAN on domestic silkworms have not been assessed in detail. The present study investigated the effects of night lighting on diapause regulation in Bombyx mori, with a focus on light sensitivity. The silkworm larvae were exposed to LAN at intensity varying f

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Norling, Ulf. "Growth, winter preparations and timing of emergence in temperate zone Odonata: control by a succession of larval response patterns." International Journal of Odonatology 24 (March 4, 2021): 1–36. http://dx.doi.org/10.23797/2159-6719_24_1.

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As warm-adapted insects of tropical origin, Odonata cope with cold periods by seasonal regulation and diapause. A model for larval-overwintering species is proposed with three response patterns related to the timing of emergence, which can be predicted from seasonal cues during the last few stadia. For emergence during the present season, there is an often time-constrained preemergence development, accelerated by long days and higher temperatures. In regulatory development, emergence is postponed to the next season, and a complex of diapause-like delays controlled by photoperiod and temperatur

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Pitts-Singer, Theresa L. "Photoperiod Effect on Megachile rotundata (Hymenoptera: Megachilidae) Female Regarding Diapause Status of Progeny: The Importance of Data Scrutiny." Environmental Entomology 49, no. 2 (2020): 516–27. http://dx.doi.org/10.1093/ee/nvaa004.

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Abstract Megachile rotundata F. populations are managed to pollinate alfalfa, Medicago sativa L. (Fabaceae), for seed production in western North America. Some progeny produced in summer by overwintered M. rotundata females enter diapause as prepupae to overwinter and become adults the following year. Other offspring avert diapause to undergo adult emergence in summer. The regulatory mechanism(s) of diapause induction or aversion is unknown; the process apparently involves multiple and integrated factors. This 4-yr study sought to determine effects of the exposure of mother bees to short, long

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Wise, Ian L., and Robert J. Lamb. "Diapause and emergence of Sitodiplosis mosellana (Diptera: Cecidomyiidae) and its parasitoid Macroglenes penetrans (Hymenoptera: Pteromalidae)." Canadian Entomologist 136, no. 1 (2004): 77–90. http://dx.doi.org/10.4039/n03-032.

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AbstractThe requirements for successful diapause of field-collected larvae and emergence of the adult wheat midge, Sitodiplosis mosellana (Géhin), and its egg parasitoid Macroglenes penetrans (Kirby) were investigated in the laboratory. Both species showed little decline in survival for up to 5 weeks at 20 °C in dry wheat spikes and could successfully diapause in wheat spikes at 0 °C for at least 200 d, although larvae usually drop to the soil to diapause. Both species diapaused successfully in clay loam and fine quartz sand, but survival was lower in vermiculite or coarse activated clay. Diap

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Judd, Gary J. R., Scott Arthur, Keith Deglow, and Mark G. T. Gardiner. "Operational mark–release–recapture field tests comparing competitiveness of wild and differentially mass-reared codling moths from the Okanagan–Kootenay sterile insect program." Canadian Entomologist 143, no. 3 (2011): 300–316. http://dx.doi.org/10.4039/n11-005.

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AbstractPheromone trap catches and mating activity of sterile, mass-reared, diapaused and non-diapaused male codling moths, Cydia pomonella (L.) (Lepidoptera: Tortricidae), were compared with those of wild diapaused males using mark–release–recapture field experiments in springtime. Sterile moths were provided by the Okanagan–Kootenay Sterile Insect Release (SIR) Program mass-rearing facility, in Osoyoos, British Columbia, Canada. Nondiapause-reared (SIR-standard) and diapause-reared (SIR-diapaused) sterile males were recaptured in similar frequencies. Both types of sterile males were recaptur

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Renfree, M. B., and G. Shaw. "Diapause." Annual Review of Physiology 62, no. 1 (2000): 353–75. http://dx.doi.org/10.1146/annurev.physiol.62.1.353.

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Gao, Qiao, Bing-Xin Wei, Wen Liu, Jia-Lu Wang, Xing-Miao Zhou, and Xiao-Ping Wang. "Differences in the Development of Internal Reproductive Organs, Feeding Amount and Nutrient Storage between Pre-Diapause and Pre-Reproductive Harmonia axyridis Adults." Insects 10, no. 8 (2019): 243. http://dx.doi.org/10.3390/insects10080243.

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Diapause control is one of the successful methods for long-term cold storage of biological control organisms without decreasing their fitness. Sufficient preparation before diapause is essential for successful diapause initiation and maintenance. Harmonia axyridis, an important biocontrol agent in its native place, can enter reproductive diapause for overwintering. However, the key preparatory events before diapause in H. axyridis, such as specific developmental trajectory, timing, and physiological changes, remain unclear. We compared differences in the development of internal reproductive or

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Hu, Chi-Kuo. "Handling Diapause Embryos of the African Turquoise KillifishNothobranchius furzeri." Cold Spring Harbor Protocols 2023, no. 2 (2022): pdb.prot107752. http://dx.doi.org/10.1101/pdb.prot107752.

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The African turquoise killifishNothobranchius furzeriis an emerging research organism known for its short life span and long-term diapause. Diapause is a unique dormant state that suspends embryonic development without tradeoffs in the adulthood life span. Recently, diapause has been gaining increasing interest from the research community. Here, we report our methods for handling the embryos ofN. furzerithat go through diapause. We focus on a few key steps: (1) collectingN. furzeriembryos, (2) sorting embryos entering diapause, (3) storing diapause embryos, (4) screening embryos exiting diapau

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Chen, C., L. Xiao, H. M. He, J. Xu, and F. S. Xue. "A genetic analysis of diapause in crosses of a southern and a northern strain of the cabbage beetle Colaphellus bowringi (Coleoptera: chrysomelidae)." Bulletin of Entomological Research 104, no. 5 (2014): 586–91. http://dx.doi.org/10.1017/s0007485314000352.

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AbstractAs a consequence of geographical variation in diapause mechanism in the cabbage beetle, Colaphellus bowringi, the southern strains enter diapause as an adult in response to long photoperiod, whereas the northern strains enter diapause in response to temperature. In the present study, we examined the inheritance of diapause by crossing a southern Xiushui strain (XS) with a most-northern Harbin strain (HB). The southern XS strain showed a clear short-day response for the induction of diapause, whereas the most-northern strain entered diapause regardless of photoperiod. Interestingly, the

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Cui, Jin, Kejian Lin, Linbo Xu, Fangzheng Yue, Liangbin Yu, and Quanyi Zhang. "Transcriptome Analysis of Beet Webworm Shows That Histone Deacetylase May Affect Diapause by Regulating Juvenile Hormone." Insects 13, no. 9 (2022): 835. http://dx.doi.org/10.3390/insects13090835.

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The beet webworm (Loxostege sticticalis L.) is an important agricultural pest and can tolerate harsh environmental conditions by entering diapause. The diapause mechanism of beet webworm is unknown. Therefore, we conducted a transcriptomic study of the process from diapause induction to diapause release in beet webworms. The results revealed 393 gene modules closely related to the diapause of beet webworm. The hub gene of the red module was the HDACI gene, which acts through histone deacetylase (HDAC) enzymes. HDAC enzyme activity was regulated by the light duration and influenced the JH conte

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He, H. M., H. J. Xiao, and F. S. Xue. "Parental effect of diapause in relation to photoperiod and temperature in the cabbage beetle, Colaphellus bowringi (Coleoptera: Chrysomelidae)." Bulletin of Entomological Research 108, no. 6 (2018): 773–80. http://dx.doi.org/10.1017/s0007485318000019.

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AbstractIncreasing evidence has demonstrated that the environmental conditions experienced by parents can shape offspring phenotypes. Here, we examined the effects of the photoperiod and temperature experienced by parents on the incidence of diapause in their progeny in the cabbage beetle, Colaphellus bowringi, using three experiments. The first experiment examined parental diapause incidence under different photoperiods at 25°C and the incidence of diapause in progeny from both non-diapausing and diapausing parents under the same rearing conditions. The results revealed that the incidence of

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Hu, Chi-Kuo, Wei Wang, Julie Brind’Amour, et al. "Vertebrate diapause preserves organisms long term through Polycomb complex members." Science 367, no. 6480 (2020): 870–74. http://dx.doi.org/10.1126/science.aaw2601.

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Diapause is a state of suspended development that helps organisms survive extreme environments. How diapause protects living organisms is largely unknown. Using the African turquoise killifish (Nothobranchius furzeri), we show that diapause preserves complex organisms for extremely long periods of time without trade-offs for subsequent adult growth, fertility, and life span. Transcriptome analyses indicate that diapause is an active state, with dynamic regulation of metabolism and organ development genes. The most up-regulated genes in diapause include Polycomb complex members. The chromatin m

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Wilson, Elisabeth S., Claire E. Murphy, Covey Wong, Joseph P. Rinehart, George D. Yocum, and Julia H. Bowsher. "Environmental impacts on diapause and survival of the alfalfa leafcutting bee, Megachile rotundata." PLOS ONE 16, no. 8 (2021): e0254651. http://dx.doi.org/10.1371/journal.pone.0254651.

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Megachile rotundata exhibits a facultative prepupal diapause but the cues regulating diapause initiation are not well understood. Possible cues include daylength and temperature. Megachile rotundata females experience changing daylengths over the nesting season that may influence diapause incidence in their offspring through a maternal effect. Juvenile M. rotundata spend their developmental period confined in a nesting cavity, potentially subjected to stressful temperatures that may affect diapause incidence and survival. To estimate the impact of daylength and nest cavity temperature on offsp

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Lehmann, Philipp, Sören Nylin, Karl Gotthard, and Mikael A. Carlsson. "Idiosyncratic development of sensory structures in brains of diapausing butterfly pupae: implications for information processing." Proceedings of the Royal Society B: Biological Sciences 284, no. 1858 (2017): 20170897. http://dx.doi.org/10.1098/rspb.2017.0897.

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Diapause is an important escape mechanism from seasonal stress in many insects. A certain minimum amount of time in diapause is generally needed in order for it to terminate. The mechanisms of time-keeping in diapause are poorly understood, but it can be hypothesized that a well-developed neural system is required. However, because neural tissue is metabolically costly to maintain, there might exist conflicting selective pressures on overall brain development during diapause, on the one hand to save energy and on the other hand to provide reliable information processing during diapause. We per

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Gong, Jing, Yuhao Zhang, Jiamin Yan, Shan Shang, Hanfei Gu, and Yong Zhu. "Effect of Hypoxia on Embryo Development in Silkworm Eggs." Annals of the Entomological Society of America 113, no. 1 (2019): 55–61. http://dx.doi.org/10.1093/aesa/saz060.

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Abstract Diapause is a common phenomenon during which organisms suspend development to overcome difficult environmental conditions. The silkworm is a classical model for the study of egg diapause. Our previous study showed that gene expression is similar in silkworm eggs treated with hyperoxia or HCl. In the present study, to further explore the mechanism of diapause prevention, nondiapause eggs and hyperoxia-/HCl-activated diapause eggs were treated with hypoxia. Embryo morphology, hatching time, and reactive oxygen species (ROS) levels were analyzed across different developmental stages. The

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Chen, Chao, Qin-Wen Xia, Shu Fu, Xian-Fu Wu, and Fang-Sen Xue. "Effect of photoperiod and temperature on the intensity of pupal diapause in the cotton bollworm, Helicoverpa armigera (Lepidoptera: Noctuidae)." Bulletin of Entomological Research 104, no. 1 (2013): 12–18. http://dx.doi.org/10.1017/s0007485313000266.

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AbstractThe intensity of pupal diapause in the cotton bollworm, Helicoverpa armigera (Hübner) was investigated under both laboratory and natural conditions. By transferring diapausing pupae induced under LD 11:13, LD 12:12 and LD 13:11 at 20, 22 and 25 °C to 25 °C combined with LD 15:9 to terminate diapause the rearing day length of 11 h evoked greater intensity of diapause than did 12 and 13 h at 25 °C; whereas the rearing temperature of 25 °C evoked more intense diapause than did 20 and 22 °C under LD 11:13. By transferring diapausing pupae induced under LD 12:12 at 20 and 22 °C to six tempe

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Lysyk, T. J., and R. D. Moon. "DIAPAUSE INDUCTION IN THE HORN FLY (DIPTERA: MUSCIDAE)." Canadian Entomologist 126, no. 4 (1994): 949–59. http://dx.doi.org/10.4039/ent126949-4.

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AbstractLaboratory studies of diapause induction in the horn fly Haematobia irritans irritans (L.) indicated that the incidence of diapause was unrelated to daylength or the number of day–night cycles. Transfer experiments were conducted to estimate the beginning and end of diapause sensitivity and the required number of days for diapause induction. On average, sensitivity was between the ages 0.10 and 0.82 on a physiological age scale of immature development. The number of days required for 50% diapause was estimated as 19.1 days. A model was developed relating the proportion of insects in di

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Zhang, Jing, Falak Naz Miano, Ting Jiang, Yingchuan Peng, Wanna Zhang, and Haijun Xiao. "Characterization of Three Heat Shock Protein Genes in Pieris melete and Their Expression Patterns in Response to Temperature Stress and Pupal Diapause." Insects 13, no. 5 (2022): 430. http://dx.doi.org/10.3390/insects13050430.

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Heat shock protein 70 genes participate in obligatory pupal diapause in Pieris melete to survive unfavorable conditions. In this study, three full-length cDNAs of PmHsc70, PmHsp70a and PmHsp70b were identified, and their expression patterns in response to diapause and short-term temperature stresses were investigated. Summer and winter diapause were induced in the pupae and non-diapause individuals were used as a control. The pupae from each diapause group were subjected to either hot or cold conditions and the expression levels of the HSP genes were measured. Our results showed that up-regula

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Sim, Cheolho, and David L. Denlinger. "Transcription profiling and regulation of fat metabolism genes in diapausing adults of the mosquito Culex pipiens." Physiological Genomics 39, no. 3 (2009): 202–9. http://dx.doi.org/10.1152/physiolgenomics.00095.2009.

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Culex pipiens , the mosquito that vectors West Nile virus in North America, overwinters in an adult diapause (dormancy) that is programmed by the short day length and low temperatures of autumn. In response to these environmental signals, females cease feeding on blood and instead seek sources of nectar used to generate the huge lipid reserves required for winter survival. To identify regulatory networks that regulate fat accumulation and fat consumption during diapause, we compared expression of fat-related genes from nondiapausing females with expression of those same genes in early and late

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Xiao, L., H. M. He, P. S. Zhong, S. Fu, C. Chen, and F. S. Xue. "Inheritance of photoperiodic control of larval diapause in the Asian corn borer Ostrinia furnacalis (Guenée)." Bulletin of Entomological Research 105, no. 3 (2015): 326–34. http://dx.doi.org/10.1017/s0007485315000140.

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AbstractThe Asian corn borer, Ostrinia furnacalis enters diapause as fully grown larvae. Owing to geographical variation in photoperiodic control of diapause, the subtropical strain from Hefei city (HF) enters diapause in response to short daylengths, whereas the tropical strain from Ledong county (LD) exhibits almost no diapause under the same conditions. The two strains were used in crosses to study the inheritance of diapause. The HF strain showed a typical long-day response with a critical daylength of approximately14.97 h at 22 °C, 14.60 h at 25 °C and 13.68 h at 28 °C. The LD strain show

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Melcher, Heidi L., and Lee H. Townsend. "Diapause Induction in a Kentucky Population of Diprion similis (Hymenoptera: Diprionidae)." Journal of Entomological Science 34, no. 3 (1999): 328–34. http://dx.doi.org/10.18474/0749-8004-34.3.328.

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Critical photoperiod, sensitive stage for diapause induction, and requirements for termination of diapause were studied in a colony of the introduced pine sawfly, Diprion similis (Hartig), established from a feral Kentucky population. We investigated induction of diapause in the laboratory under photoperiods of 10:14, 11:13, 12:12, 13:11, 14:10, 15:9, and 16:8 (L:D) in the first trial, and added a photoperiod of 9:15 (L:D) in the second trial. Individuals exposed to light periods ≤12:12 (L:D) entered diapause; individuals in a photoperiod &gt; 13:11 (L:D) bypassed diapause. The sensitive s

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Santos, Priscila Karla Ferreira, Maria Cristina Arias, and Karen M. Kapheim. "Loss of developmental diapause as prerequisite for social evolution in bees." Biology Letters 15, no. 8 (2019): 20190398. http://dx.doi.org/10.1098/rsbl.2019.0398.

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Diapause is a physiological arrest of development ahead of adverse environmental conditions and is a critical phase of the life cycle of many insects. In bees, diapause has been reported in species from all seven taxonomic families. However, they exhibit a variety of diapause strategies. These different strategies are of particular interest since shifts in the phase of the insect life cycle in which diapause occurs have been hypothesized to promote the evolution of sociality. Here we provide a comprehensive evaluation of this hypothesis with phylogenetic analysis and ancestral state reconstruc

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Baumgärtner, Johann, Andrew Paul Gutierrez, Simone Pesolillo, and Maurizio Severini. "A model for the overwintering process of European grapevine moth Lobesia botrana (Denis & Schiffermüller) (Lepidoptera, Tortricidae) populations." Journal of Entomological and Acarological Research 44, no. 1 (2012): 2. http://dx.doi.org/10.4081/jear.2012.e2.

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The paper deals with the development, parametrization and validation of a phenology model of the overwintering process of European grapevine moth <em>Lobesia botrana </em>(Denis &amp; Schiffermüller) populations in northern latitudes. The model is built on diapause and poikilothermic population development theories and represents the phenological events of entries into and emergence from pre-diapause, diapause and post-diapause phases. The rate sum models for pre-diapause and post-diapause development are based on published non-linear temperature dependent rate functions. The

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Nadeau, Emily A. W., Melise C. Lecheta, John J. Obrycki, and Nicholas M. Teets. "Transcriptional Regulation of Reproductive Diapause in the Convergent Lady Beetle, Hippodamia convergens." Insects 13, no. 4 (2022): 343. http://dx.doi.org/10.3390/insects13040343.

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Diapause is an alternate development program that synchronizes an insect’s life cycle with seasonally abundant resources and ensures survival in unfavorable conditions. The physiological basis of diapause has been well characterized, but the molecular mechanisms regulating it are still being elucidated. Here, we present a de novo transcriptome and quantify transcript expression during diapause in the convergent lady beetle Hippodamia convergens. H. convergens is used as an augmentative biocontrol agent, and adult females undergo reproductive diapause that is regulated by photoperiod. We sample

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Des Marteaux, Lauren E., Marc B. Habash, Jonathan M. Schmidt, and Rebecca H. Hallett. "A method for induction and quantification of diapause entry in the swede midge (Diptera: Cecidomyiidae)." Canadian Entomologist 144, no. 6 (2012): 792–800. http://dx.doi.org/10.4039/tce.2012.81.

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AbstractInduction of diapause under laboratory conditions is a valuable tool for the study of dormancy in economic pests such as the swede midge, Contarinia nasturtii Kieffer (Diptera: Cecidomyiidae). In the present study, diapause in larval swede midge was achieved via manipulation of rearing photoperiod and temperature. Frequency of diapause was assessed by sieve separation of diapause cocoons from pre-sifted peat substrate following emergence of pupating individuals. Mean diapause frequency for swede midge larvae reared under cool conditions with short day length or cool conditions with dec

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Xiao, H. J., S. H. Wu, H. M. He, C. Chen, and F. S. Xue. "Role of natural day-length and temperature in determination of summer and winter diapause in Pieris melete (Lepidoptera: Pieridae)." Bulletin of Entomological Research 102, no. 3 (2011): 267–73. http://dx.doi.org/10.1017/s0007485311000587.

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AbstractUnder field conditions, the cabbage butterfly, Pieris melete, displays a pupal summer diapause in response to relatively low daily temperatures and gradually increasing day-length during spring and a pupal winter diapause in response to the progressively shorter day-length. To determine whether photoperiod is ‘more’ important than temperature in the determination of summer and winter diapause, or vice versa, the effects of naturally changing day-length and temperature on the initiation of summer and winter diapause were systematically investigated under field conditions for five succes

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Guo, Shuang, Zhong Tian, Qing-Wen Wu, et al. "Steroid hormone ecdysone deficiency stimulates preparation for photoperiodic reproductive diapause." PLOS Genetics 17, no. 2 (2021): e1009352. http://dx.doi.org/10.1371/journal.pgen.1009352.

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Diapause, a programmed developmental arrest primarily induced by seasonal environmental changes, is very common in the animal kingdom, and found in vertebrates and invertebrates alike. Diapause provides an adaptive advantage to animals, as it increases the odds of surviving adverse conditions. In insects, individuals perceive photoperiodic cues and modify endocrine signaling to direct reproductive diapause traits, such as ovary arrest and increased fat accumulation. However, it remains unclear as to which endocrine factors are involved in this process and how they regulate the onset of reprodu

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Margus, Aigi, and Leena Lindström. "Prolonged diapause has sex-specific fertility and fitness costs." Evolutionary Ecology 34, no. 1 (2019): 41–57. http://dx.doi.org/10.1007/s10682-019-10024-1.

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AbstractDiapause in seasonal environments allows insects to survive adverse seasons. However, individuals can sometimes enter a prolonged diapause for more than a year, and also skip favourable seasons, which can bring additional costs through e.g. loss of metabolic resources. At the same time, prolonged diapause can be beneficial if it allows individuals to have a risk-spreading strategy to skip potentially suboptimal breeding seasons. We studied if prolonged diapause (2-year diapause) negatively affects the fertility and fitness of female and male Colorado potato beetles (Leptinotarsa deceml

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Hasan, Fazil, M. Shafiq Ansari, Mukesh K. Dhillon, et al. "Diapause regulation in Zygogramma bicolorata (Coleoptera: Chrysomelidae), a biocontrol agent of Parthenium hysterophorus." International Journal of Tropical Insect Science 38, no. 02 (2018): 145–58. http://dx.doi.org/10.1017/s1742758417000303.

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AbstractZygogramma bicolorata Pallister is a potential biocontrol agent of Parthenium hysterophorus L. (Asteraceae). This study was carried out to understand the effect of abiotic (temperature and moisture) and biotic factors (age and reproductive status) on the induction and termination of diapause in Z. bicolorata. We also evaluated the effect of diapause on longevity and fecundity of Z. bicolorata. In Z. bicolorata the induction of diapause occurred between the months of July and December. No diapause was observed in May and June, which coincided with the commencement of the monsoon rains.

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Yan, Jian, Lin Zhang, Mingxuan Xu, Xiaofeng Zhang, and Lvquan Zhao. "Overwintering Strategies and Post-Diapause Female Reproduction Fitness in the Willow Leaf Beetle Plagiodera versicolora (Coleoptera: Chrysomelidae)." Insects 16, no. 2 (2025): 140. https://doi.org/10.3390/insects16020140.

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Diapause, a survival strategy utilized by many insects under severe environmental conditions, can generate costs that potentially affect post-diapause development and reproduction. The willow leaf beetle, Plagiodera versicolora, overwinters as an adult. This study investigated the cold hardiness-hardiness and energy utilization of female P. versicolora, and their impact on post-diapause reproductive fitness. The supercooling point exhibited seasonal temperature variation, with the lowest points occurring in January and February, coinciding with the relatively lower ambient temperatures. Lipid

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Voinovich, Natalia D., and Sergey Y. Reznik. "Heat and Cold Shocks Decrease the Incidence of Diapause in Trichogramma telengai Larvae." Insects 16, no. 1 (2025): 54. https://doi.org/10.3390/insects16010054.

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Insect diapause and response to thermal stress are similar in the variety of manifestations. However, the influence of thermal shocks on the incidence of insect diapause has not been sufficiently studied. Our laboratory experiments showed that both cold (−10 °C) and heat (43 °C) shocks experienced for at least 20–30 min significantly reduced the incidence of facultative larval winter diapause in the insect egg parasitoid Trichogramma telengai. However, the patterns of these responses were substantially different. In particular, the peaks of the sensitivity to diapause-averting effects of heat

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Han, Er-Ning, and Eric Bauce. "PHYSIOLOGICAL CHANGES AND COLD HARDINESS OF SPRUCE BUDWORM LARVAE, CHORISTONEURA FUMIFERANA (CLEM.), DURING PRE-DIAPAUSE AND DIAPAUSE DEVELOPMENT UNDER LABORATORY CONDITIONS." Canadian Entomologist 125, no. 6 (1993): 1043–53. http://dx.doi.org/10.4039/ent1251043-6.

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AbstractSupercooling point, biochemical metabolites, and water content of the larvae of Choristoneura fumiferana (Clem.) were measured during pre-diapause and diapause development under laboratory conditions. Supercooling point dropped significantly, from a mean value of −22.9 °C to −31.7 °C during the 3-week pre-diapause development. Supercooling point continued to decline down to −34.5 °C after the beginning of diapause. Water content also dropped significantly during pre-diapause development and was maintained at a low level during diapause. Significant amounts of glycerol were detected onl

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Sommerville, R. I., and K. G. Davey. "Diapause in parasitic nematodes: a review." Canadian Journal of Zoology 80, no. 11 (2002): 1817–40. http://dx.doi.org/10.1139/z02-163.

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This review considers in a selective way the literature on diapause in parasitic nematodes, concentrating on four species of animal parasites and three species of plant parasites. We define diapause as a developmental arrest which is temporarily irreversible, so development will not resume, even under favourable conditions, until some intrinsic changes have been completed. Our analysis recognises four stages in diapause. The first is induction, typically brought about by environmental signals (although diapause may be genetically programmed independently of the environment). These environmenta

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Liu, Yan, Long Su, Ruijuan Wang, et al. "Comparative 4D Label-Free Quantitative Proteomic Analysis of Bombus terrestris Provides Insights into Proteins and Processes Associated with Diapause." International Journal of Molecular Sciences 25, no. 1 (2023): 326. http://dx.doi.org/10.3390/ijms25010326.

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Diapause, an adaptative strategy for survival under harsh conditions, is a dynamic multi-stage process. Bombus terrestris, an important agricultural pollinator, is declining in the wild, but artificial breeding is possible by imitating natural conditions. Mated queen bees enter reproductive diapause in winter and recover in spring, but the regulatory mechanisms remain unclear. Herein, we conducted a comparative 4D label-free proteomic analysis of queen bees during artificial breeding at seven timepoints, including pre-diapause, diapause, and post-diapause stages. Through bioinformatics analysi

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Yu, Zhijun, Tingwei Pei, Meng Zhang, et al. "Differential transcriptome profiling of the diapause and cold-responsive genes in unfed adult Dermacentor silvarum Olenev (Acari: Ixodidae)." Systematic and Applied Acarology 25, no. 2 (2020): 193–213. http://dx.doi.org/10.11158/saa.25.2.3.

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The tick Dermacentor silvarum mainly overwinters in northern China as an unfed adult entering diapause; however, little is known about the involvement of genes and pathways in summer diapause and overwintering adults of this species. Hence, we investigated the differential transcriptome profile of D. silvarum ticks’ diapause and cold-responsive genes and pathways during its summer diapause, overwintering, and questing/active stages. Through transcriptomic sequencing, a total of 136,740 unigenes were assembled, and 1,549, 2,196, and 2,125 differentially expressed genes (DEG) were identified in

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Erickson, Priscilla A., Cory A. Weller, Daniel Y. Song, Alyssa S. Bangerter, Paul Schmidt, and Alan O. Bergland. "Unique genetic signatures of local adaptation over space and time for diapause, an ecologically relevant complex trait, in Drosophila melanogaster." PLOS Genetics 16, no. 11 (2020): e1009110. http://dx.doi.org/10.1371/journal.pgen.1009110.

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Organisms living in seasonally variable environments utilize cues such as light and temperature to induce plastic responses, enabling them to exploit favorable seasons and avoid unfavorable ones. Local adapation can result in variation in seasonal responses, but the genetic basis and evolutionary history of this variation remains elusive. Many insects, including Drosophila melanogaster, are able to undergo an arrest of reproductive development (diapause) in response to unfavorable conditions. In D. melanogaster, the ability to diapause is more common in high latitude populations, where flies e

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