Academic literature on the topic 'Overwintering survival'
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Journal articles on the topic "Overwintering survival"
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Uelmen, Johnny A., John G. Duman, Richard L. Lindroth, Ezra G. Schwartzberg, and Kenneth F. Raffa. "Supercooling points of diapausing forest tent caterpillar (Lepidoptera: Lasiocampidae) eggs." Canadian Entomologist 148, no. 5 (March 11, 2016): 512–19. http://dx.doi.org/10.4039/tce.2015.88.
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AbstractForest tent caterpillar (Malacosoma disstriaHübner; Lepidoptera: Lasiocampidae) is a widely distributed defoliator that undergoes intermittent outbreaks. It overwinters as pharate larvae within egg bands, is univoltine, and experiences low winter temperatures in its northern range. Little is known about how low temperatures affect winter survival and cold tolerances, their cold tolerance strategy, or how cold tolerances may vary over time and among populations. We evaluated supercooling points (SCPs) from four populations ofM. disstriaeggs collected along a 552 km latitudinal gradient from southern Wisconsin to northern Minnesota, United States of America. To test for potential effects of winter environment, we also administered three overwintering regimes (Madison, Wisconsin; Cloquet, Minnesota; Ely, Minnesota). Supercooling points were recorded in November, February, and March of 2011–2012. Supercooling points varied with maternal source (egg band), time of winter season, population source, and overwintering treatment. Means ranged from −26.8 °C (±0.5 °C) to −40.3 °C (±0.3 °C), accordingly. In a separate laboratory experiment, 89% of pharate larvae held at −20 °C (18.3 °C above coolest mean SCP) survived, but none held at −45 °C (6.7 °C below lowest mean SCP) survived. This relatively high degree of cold tolerance in its overwintering stage, due to freeze avoidance, may partially explain survival patterns and limits of overwinteringM. disstriain northern populations.
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Berthiaume, Richard, Christian Hébert, Martin Charest, Alain Dupont, and Éric Bauce. "Host Tree Species Affects Spruce Budworm Winter Survival." Environmental Entomology 49, no. 2 (March 11, 2020): 496–501. http://dx.doi.org/10.1093/ee/nvaa020.
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Abstract With current trends in global warming, it has been suggested that spruce budworm outbreaks may spread to northern parts of the boreal forest. However, the major constraints for a northward expansion are the availability of suitable host trees and the insect winter survival capacity. This study aimed to determine the effect of larval feeding on balsam fir, white spruce and black spruce on various spruce budworm life history traits of both the parental and the progeny generations. Results indicated that the weight of the overwintering larval progeny and their winter survival were influenced by host tree species on which larvae of the parental generation fed. White spruce was the most suitable host for the spruce budworm, producing the heaviest pupae and the heaviest overwintering larvae while black spruce was the least suitable, producing the smallest pupae and the smallest overwintering progeny. Overwintering larvae produced by parents that fed on black spruce also suffered higher winter mortality than individuals coming from parents that fed on balsam fir or white spruce. With current trends in global warming, spruce budworm is expected to expand its range to northern boreal forests where black spruce is the dominant tree species. Such northern range expansion might not result in outbreaks if low offspring winter survival on black spruce persist.
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Lu, Chunsheng, and Mark Bridgen. "EFFECTS OF OVERWINTERING COVERS ON ALSTROEMERIA SURVIVAL." HortScience 28, no. 4 (April 1993): 258D—258. http://dx.doi.org/10.21273/hortsci.28.4.258d.
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During the winter of 1991-92. four cultivars of Alstroemeria: `F-180'. `l-5'. `Parigo Pink' and `Parigo Red' were treated with eight different overwintering covers: straw, straw with plastic covering, sawdust, sawdust with plastic covering, hoops with plastic covering, hoops with microfoam covering, microfoam and a control with no cover. All covers had significant effects on the survival of `Parigo Pink' and `Parigo Red'; mulching with straw only gave the best winter protection. There were also significant genotypic differences among the four cultivars: 73% of `Parigo Pink' and `Parigo Red' plants survived after winter, but none of `F-180' or `l-5' survived. In addition, pre-winter evaluation indicated that there were significant genotypic differences among the four cultivars with cold resistance. The cold resistance was highly correlated with winter hardiness. It was concluded that: (1) pre-winter evaluation could be an efficient indicator for winter hardiness selection on Alstroemeria and (2) application of straw provided sufficient winter protection for zone 6 Alstroemeria. Other approaches of mulching need to be further identified in order to protect all Alstroemeria for overwintering in the northeastern United States.
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Dimke, K. C., S. K. Still, and D. S. Gardner. "Effect of Overwintering Environment on the Survival of 30 Species of Herbaceous Perennials." Journal of Environmental Horticulture 26, no. 4 (December 1, 2008): 222–26. http://dx.doi.org/10.24266/0738-2898-26.4.222.
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Abstract There is increased interest in overwintering containerized perennials. However, there is little information available on overwintering success. The objective of this research was to determine overwinter survival and regrowth quality of 30 perennial species hardy in USDA zones 3, 4, or 5. Three overwintering treatments were used for each species: unprotected containers outside, containers in an unheated building, or in the ground. On April 16, 2004, and May 17, 2004, following overwintering, plant quality, plant height and flowering time were evaluated. Twenty-one species were successfully overwintered in an unheated building and 13 of those had quality ratings equal to or higher than those overwintered in-ground. Ceratostigma plumbaginoides, Kniphofia Pfitzer's Hybrid, Leucanthemum ×superbum ‘Snowcap’, and Stokesia laevis ‘Honeysong Purple’ rated significantly higher when overwintered in containers stored inside than in the ground. Flowering time and height measurement differences were not significant. Coreopsis ‘Limerock Ruby’, Diascia integerrima CoralCanyon™ and Gaura lindheimeri ‘Siskiyou Pink’ did not survive in any treatment. None of the species tested, with the exception of Sedum ‘Matrona’, survived when overwintered unprotected outside. Overwintering certain species of containerized perennials inside an unheated building such as a garage is a viable option for homeowners to improve survival.
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Curtis, David L., Thomas G. Ranney, Frank A. Blazich, and Everett P. Whitman. "Rooting and Subsequent Overwinter Survival of Stem Cuttings of Stewartia ovata." Journal of Environmental Horticulture 14, no. 3 (September 1, 1996): 163–66. http://dx.doi.org/10.24266/0738-2898-14.3.163.
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Abstract Three experiments were conducted using stem cuttings of Stewartia ovata (Cav.) Weatherby to evaluate: 1) effects of indolebutyric acid (IBA) concentration on percent rooting and rooting index (root system size), 2) influence of N rate and medium amendments (dolomitic lime and/or complete fertilizer) on budbreak prior to overwintering and survival and shoot growth of cuttings following overwintering, and 3) effects of chilling duration on overwinter survival and subsequent shoot growth. Softwood cuttings of S. ovata were taken on June 19 and July 23, 1992, and treated with 0, 1000, 2000, 4000, or 8000 ppm IBA in 50% isopropyl alcohol. Rooting percentages and rooting index were highest for cuttings taken in June and treated with 2000 or 4000 ppm IBA. In the second experiment, cuttings were rooted in pine bark containing three different amendment combinations, and fertilized weekly with either 0, 50, 100, or 200 ppm N following root initiation. Overwinter survival was higher for cuttings rooted in pine bark or pine bark amended with lime, but decreased for cuttings in pine bark amended with lime and a complete fertilizer. Increasing N fertilization up to 200 ppm weekly stimulated budbreak prior to overwintering, resulted in greater shoot growth following overwintering, but had no effect on overwintering survival. In the third experiment, rooted cuttings were subjected to 0, 2, 4, 6, 8, or 10 weeks chilling at 6C (43F). Cuttings chilled for 10 weeks had the highest percent budbreak (survival) and greater overall shoot growth over a 12 week forcing period.
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Caron, V., and J. H. Myers. "Positive association between resistance to Bacillus thuringiensis and overwintering survival of cabbage loopers, Trichoplusia ni (Lepidoptera: Noctuidae)." Bulletin of Entomological Research 98, no. 3 (February 7, 2008): 317–22. http://dx.doi.org/10.1017/s0007485307005597.
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AbstractDevelopment of resistance to insecticides has generally been associated with fitness costs that may be magnified under challenging conditions. Lepidopterans which are resistant to the biopesticide Bacillus thuringiensis subsp. kurstaki (Btk) have been shown to have reduced fitness, such as lower survival when subjected to overwintering stress. Recently, resistance to Btk has been found in some populations of Trichoplusia ni Hübner in greenhouses in British Columbia. This situation provides an opportunity to investigate potential trade-offs between overwintering survival and insecticide resistance in a major pest species. Here, we assess the survival and eventual fecundity of Btk resistant and susceptible T. ni pupae exposed to cool temperatures. Contrary to our expectations, resistant T. ni had higher overwintering survival than susceptible individuals. This is the first account of a potential advantage associated with Btk resistance. Resistant and susceptible moths had reduced fecundity and smaller progeny after cold exposure compared to controls, and this may counteract the survival advantage. Nevertheless, it seems unlikely that this is sufficient to select out the resistant phenotype in the presence of strong selection for resistance and in the absence of immigration of susceptible moths. The appearance of resistance without evidence of a trade-off in overwintering survival presents a major challenge to management in production greenhouses.
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Koehler, A. M., and H. D. Shew. "Enhanced Overwintering Survival of Stevia by QoI Fungicides Used for Management of Sclerotium rolfsii." Plant Disease 101, no. 8 (August 2017): 1417–21. http://dx.doi.org/10.1094/pdis-02-17-0277-re.
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Stevia (Stevia rebaudiana) is a herbaceous perennial under evaluation as a new crop in the southeastern United States. Stem rot caused by Sclerotium rolfsii is common in stevia plantings in North Carolina, with symptoms including wilting, root and stem necrosis, and plant death. Fungicide efficacy trials for management of S. rolfsii were conducted over 2 years. Fungicides evaluated included azoxystrobin, flutolanil, and tebuconazole applied at three timings. Azoxystrobin applied to transplants 1 week prior to planting had the lowest area under the disease progress curve values across all trials. Fungicide plots were also used to evaluate overwintering of stevia. End-of-season stand counts were compared with spring emergence counts to quantify overwintering survival. In spring 2015, plots treated with azoxystrobin in 2014 had greater overwintering survival (78%) than other fungicide treatments (38%) and the control (38%). Similar results were obtained at two locations in spring 2016 in plots treated with azoxystrobin or pyraclostrobin in 2015. Successful overwintering of stevia directly impacts the profitability of second- and third-year harvests and enhances the likelihood of long-term establishment of stevia as a viable crop. Future studies will be directed at elucidating the mechanism of the enhanced overwintering survival of plants treated with quinone outside inhibitor fungicides.
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Li, Ji Ping, Min Quan Li, Na Na Hui, Li Wang, Yong Qiang Ma, Yong Hong Qi, Jian Jun Li, Qing Qing Li, and Tian Wang Zhou. "Survival and Germination of Overwintering Oospores of Phytophthora infestans in the Field." Applied Mechanics and Materials 295-298 (February 2013): 2308–13. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.2308.
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Survival and germination of overwintering oospores of two strains from Gansu,China compared with two standard from Wageningen, the Netherlands of Phytophthora infestans were determined in 2010-2011. It was found that compatible mating strains of P. infestans A1 and A2 produce oospores abundantly in paired cultures on tomato-rye agar medium.The survival rate of overwintering was ranged from19.57% to 24.59%.The germination rate of overwintering was ranged from 3.58% to 8.49%, and there were no significant differences in germination rate of oospores between alternating light at day/night and whole darkness at day/night. Furthermore, the soil extract liquid was more suitable for oospore germination than distilled water.
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Dancau, Tina, Peter G. Mason, and Naomi Cappuccino. "Elusively overwintering: a review of diamondback moth (Lepidoptera: Plutellidae) cold tolerance and overwintering strategy." Canadian Entomologist 150, no. 2 (February 21, 2018): 156–73. http://dx.doi.org/10.4039/tce.2018.2.
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AbstractThere is no consensus on the overwintering strategy used by the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae). As a result, the topic of diamondback moth overwintering in temperate climates remains controversial. However, there has been general agreement that the diamondback moth does not overwinter in diapause. This review compiles data on low temperature survival to determine cold tolerance mechanisms and the cold tolerance strategy of the diamondback moth. According to cold tolerance data and observations from key overwintering studies in eastern North America, the diamondback moth likely overwinters in a quiescent state in no specific overwintering stage and is chill susceptible. Observations from key overwintering studies suggest a northern overwintering limit for diamondback moth of ~43°N in eastern North America. Climate change may alter winter conditions in temperate climates, making temperate regions susceptible to potential diamondback moth overwintering and recurring outbreaks.
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Régnière, Jacques, and Pierre Duval. "OVERWINTERING MORTALITY OF SPRUCE BUDWORM, CHORISTONEURA FUMIFERANA (CLEM.) (LEPIDOPTERA: TORTRICIDAE), POPULATIONS UNDER FIELD CONDITIONS." Canadian Entomologist 130, no. 1 (February 1998): 13–26. http://dx.doi.org/10.4039/ent13013-1.
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AbstractOverwintering mortality in the spruce budworm, Choristoneura fumiferana (Clem.), was measured between 1983 and 1990 in several natural stands of balsam fir, Abies balsamea (L.), in Quebec and Ontario. Overwintering losses (disappearance of larvae) averaged 25.2%, occurred mostly in late summer and early fall, and were probably caused by, in large part, failure to spin a hibernaculum, diapause-free development, and invertebrate predation. An average of 24.1% of larvae were found dead in the hibernaculum. This mortality also occurred early in diapause and during post-diapause development, and overwintering mortality did not vary much from year to year. We conclude that overwintering mortality does not result from adverse winter weather conditions or from gradual loss of hibernacula. Overall overwintering mortality from the loss of hibernating larvae plus death within the hibernaculum averaged 43.2% and was not related to infection with the microsporidian Nosema fumiferanae (Thomson). We observed no influence of position in the tree crown on overwintering survival. There was a 40% decrease in overwintering survival among larvae from eggs laid very late in a female’s oviposition sequence. Survival within the hibernaculum on shoots of A. balsamea bearing different types of spinning substrates varied considerably, and was highly correlated with larval spinning preferences. Shoots bearing lichen mats, rough bark, male flower scars, or 1-year-old annular scales were most suitable, whereas shoots bearing annular scales older than 1 year or smooth bark were least suitable. The efficiency of the NaOH extraction technique to recover overwintering spruce budworm larvae was found to be highly variable, and to depend on population density, shoot type, and the proportion of live larvae on the branches.
Dissertations / Theses on the topic "Overwintering survival"
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Harris, William Kevin. "Increasing the overwintering survival of container-grown perennials." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/35746.
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Container grown perennials are a popular product offered by nurseries and greenhouses and included in their production but little research has been reported on proper overwintering techniques for herbaceous perennials and ornamental grasses.
In the first experiment rooted liners of Pennisetum alopecuroides, Pennisetum â Hamelnâ and Pennisetum â Little Bunny,â were potted. Treatments included, utilizing two overwintering covers, two fertilizer rates (low or high) and two substrate moisture contents (wet or dry). Covering with either a double layer of Dewitt N-Sulateâ ¢ insulation fabric or a double layer of Dewitt N-Sulateâ ¢ insulation fabric and a single sheet of 4 mil white polyethylene plastic on top of the insulation fabric, wet substrate treatments, low fertility rates and combinations of both, improved survival and vigor for all three tested Pennisetum species and cultivars.
In the second experiment, rooted liners of P. alopecuroides, P. â Hamelnâ and P. â Little Bunny,â were potted. Treatments included, two transplanting times (young or old), two fertilizer rates (low or high) and two substrate moisture contents (wet or dry) at the UHC and Poplar Ridge Nursery (Montross, VA) (PR). Vigor was improved for P. alopecuroides (at PR) and P. â Little Bunnyâ (at both locations) with the young transplanting time.
In the third experiment, older plant material of P. alopecuroides, P. â Hamelnâ and P. â Little Bunny,â were subjected to fertility treatments of no additional fertilizer or top-dressed at a low, medium or high rate . A high fertility rate reduced survival and vigor for P. â Little Bunny.â
In the fourth experiment rooted liners of Echinacea purpurea â Hot Papaya,â Echinacea purpurea â Milkshake,â Gaillardia x grandiflora â Gallo Peach,â Heuchera x villosa â Pistache,â Heuchera x villosa â Brownies,â P. alopecuroides, P. â Cassian,â P. â Hamelnâ and P. â Little Bunny,â were potted and overwintered at the UHC or Poplar Ridge Nursery (Montross, VA) (PR) or Riverbend Nursery, Inc. (Riner, VA) (RB). Treatments included, utilizing two overwintering covers, two fertilizer rates (low or high) and two substrate moisture contents (wet or dry). Vigor at the UHC, was reduced with the high fertility rate for E. â Hot Papayaâ and H. â Brownies.â A double layer of Dewitt N-Sulateâ ¢ insulation fabric and white polyethylene plastic on top of the cover, in combination with the wet substrate moisture treatment improved vigor of E. â Hot Papaya.â A double layer of Dewitt N-Sulateâ ¢ insulation fabric in combination with the wet substrate moisture content and the high fertility rate reduced P. â Cassianâ vigor. No overwintering cover reduced P. â Hamelnâ vigor. No overwintering cover and the high fertility rate reduced P. â Little Bunnyâ vigor. Vigor at PR was improved with the high fertility rate for E. â Milkshake,â G. â Gallo Peachâ and H. â Brownies.â At RB, a double layer of Dewitt N-Sulateâ ¢ insulation fabric in combination with the low fertility treatment and no cover in combination with the high fertility treatment reduced vigor for E. â Milkshakeâ and P. â Little Bunny,â respectively. No cover in combination with the wet substrate moisture treatment reduced vigor for G.â Gallo Peach.âMaster of Science
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Court, Emma Louise. "Survival mechanisms in the liver of the overwintering frog, Rana temporaria." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.598075.
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Hepatocytes isolated from frogs hibernating in hypoxic water exhibited a greater metabolic depression than normoxic counterparts. The amount of energy channelled into non-mitochondrial processes was reduced in favour of proton leak, thought to be as a means to prevent oxidative free radical damage when oxygen is limited. Protein synthesis and Na +K+ATP-ase activity were suppressed during hibernation, but the relative proportions to total metabolism remained stable. Therefore, long-term metabolic depression in hepatocytes isolated from overwintering frogs is effected by a general suppression of energy-consuming processes in such a way as to maintain metabolic efficiency. Oxyconformation was noted in isolated hepatocytes in response to acute, progressively hypoxic conditions. This ability to oxyconform was reflected at the level of the mitochondria whilst held in the confines of the cellular environment, but was lost completely upon isolation, prompting the suggestion that mitochondria are ‘slaves’ to the cell. This control appears to be regulated by an oxygen sensing system in which the extra-mitochondrial nitric oxide synthase would detect falling localised PO2 causing the release of the oxygen radicals, superoxide and nitric oxide. These would then act as intermediate signalling molecules activating the mitoKATP channel synchronising the suppression of mitochondrial metabolism with the falling oxygen tension of the local environment i.e. effecting oxyconformation. In an attempt to understand the impact that transient anoxic periods during overwintering might have on liver metabolism, isolated hepatocytes were exposed to anoxia. Lactate studies signified an upregulation of glycolytic metabolism during the initial stages of anoxia switching to a more hypometabolic strategy as the insult continued. Studies on hepatocyte oxygen consumption showed that cells were able to recover from an anoxic period exhibiting a reduced rate of respiration upon reoxygenation and recovery i.e. they were metabolically depressed. Preconditioning the cells with the incorporation of a 30min-preconditioning period prior to the longer insult produced an even more pronounced metabolic depression in response to anoxia. Overall, the results presented in this thesis support an important role for the liver in effecting the hypometabolic state of overwintering frogs.
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Dimeglio, Anthony Stephen. "Murgantia histrionica (Hahn): new trapping tactics and insights on overwintering survival." Thesis, Virginia Tech, 2018. http://hdl.handle.net/10919/98535.
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Harlequin bugs are orange and black aggregation pheromone emitting stink bug pests, specifically of cole crops such as kale, broccoli and collards. This nearly loyal crop preference makes an interesting challenge for trapping them and helping farmers predict pest severity. Harlequin bugs can be found in much of North America, and are a serious problem in the southeastern United States. Presumably their persistence into northern regions is limited by extreme winters. In 2014 and 2015 the arctic polar vortex extended into mid-latitudes bringing a blanket of sustained sub-freezing temperatures to much of the United States. We used these events to determine effects of extreme winter weather on harlequin bug survival. In both years we observed nearly identical low temperatures of -15oC and this linked to high (80-96%) harlequin bug mortality. In the lab we measured exact lethal freezing temperatures in harlequin bugs (i.e. supercooling points) to see if a physiological metric could be used to predict overwinter survival. Harlequin bug adults froze and died at -10.4oC, and similarly, their larger juvenile stages freeze at -11.0oC. Freshly hatched harlequin bugs and unhatched eggs froze at considerably lower temperatures with eggs forming ice crystals at -23.2oC and recent hatches at -21.6oC. Now with an understanding of how harlequin bugs likely survive winter extreme, we can then work on developing a trap to tally their populations in the spring and predict summer and fall pest severity. In the lab and field, harlequin bug adults and large nymphs were more likely found on green and black colors, and statistically less frequently on yellow, white, purple or red colors with the exception of adult females, which were most attracted to red and green in the lab, but green and black in the field. To increase harlequin bug attraction to and termination at traps square corrugated plastic panels were wrapped with an insecticide netting and baited with harlequin bug aggregation pheromone, murgantiol. Bugs were effectively drawn to the panels, with green panels having significantly more dead harlequin bugs and fewer dead beneficial lady beetles (Coleoptera: Coccinellidae) at their base than yellow panels. Thus, green was chosen as the ideal trap color to use for another field experiment that evaluated three trap types -- a corrugated plastic square panel, pyramidal trap, and ramp trap -- each with three lure treatments, murgantiol alone or murgantiol plus a low or high rate of mustard oil. More bugs were killed with the pyramidal trap than with the panel trap or the ramp trap, and more bugs were killed at traps containing murgantiol combined with benzyl isothiocyanate than at those with murgantiol alone. This research demonstrated that with the proper visual elements and odors, harlequin bugs can be drawn to traps and effectively killed after contact with insecticide-incorporated netting.MSLFS
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Mackey, Tracy L. "Habitat Selection and Overwintering Survival of the Introduced Wall Lizard, Podarcis muralis." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1291050368.
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Knight, Jonathan David. "Cold hardiness and overwintering survival of the grain aphid Sitobion avenae in Northern England." Thesis, University of Leeds, 1987. http://etheses.whiterose.ac.uk/4405/.
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Laboratory maintained Sitobion avenae of all developmental stages had a mean inherent supercooling ability below -20°C. Acclimation alone, or in conjunction with starvation had no significant effect on supercooling. Surface moisture on the aphid cuticle during cooling resulted in a significant loss in supercooling. Repeat coolings to temperatures markedly above the mean supercooling point resulted in increasing levels of mortality. Field collected ~ avenae showed a seasonal variation in supercooling with a higher mean supercooling point in the winter than in the remainder of the year. Field populations showed a dramatic decline in December when environmental temperatures were well above mean and individual supercooling points. It was concluded that the aphids were dying before they froze and that the supercooling point was not a reliable indicator of the lower lethal temperature. The development and reproduction of s.avenae in the field over winter were directly and positively related to temperature whilst mortality increased with decreasing temperature. The development of a multi-channel micro-bead thermistor unit allowed the study of a previously unrecorded thermal event (exotherm) during the cooling of aphids. The cause of the exotherm is unknown and warrants further investigation. Laboratory experiments on ~ avenae and the lupin aphid, Macrosiphum albifrons revealed that the adults of the two species had lower lethal temperatures (LT50) of approximately -7.5°C and -7.0°C respectively. Nymphs of ~. ayenae were significantly more cold hardy than adults in terms of LT50 values. Acclimation prior to experimentation significantly improved the cold hardiness (LT50) of s.avenae. It is concluded that in the case of s.avenae and other aphids supercooling points are ecologically irrelevant if aphids are already dead before they freeze. An experimental protocol is suggested for future experiments on insect cold hardiness.
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Moreau, Debra Lynn. "Aspects of the overwintering survival strategy of Typhlodromus pyri Scheuten (Acari, Phytoseiidae) on apple trees in Nova Scotia." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ37804.pdf.
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Sansom, Alex. "The trade-off between starvation and predation risk in overwintering redshanks (Tringa totanus)." Thesis, St Andrews, 2010. http://hdl.handle.net/10023/890.
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Kawarasaki, Yuta. "SURVIVAL AND PHYSIOLOGICAL RESPONSES TO SUBZERO TEMPERATURES IN THE ANTARCTIC MIDGE, BELGICA ANTARCTICA: TO FREEZE OR NOT TO FREEZE." Miami University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=miami1377681162.
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Cruz, Christian D. "Impact Of Foliar Diseases On Soybean In Ohio: Frogeye Leaf Spot And Septoria Brown Spot." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1228070831.
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Koehler, Gage. "Overwintering Survival of Strawberry (Fragaria x ananassa): Proteins Associated with Low Temperature Stress Tolerance during Cold Acclimation in Cultivars." 2012. http://hdl.handle.net/1805/2925.
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Indiana University-Purdue University Indianapolis (IUPUI)Winter survival is variable among commercially grown strawberry (Fragaria x ananassa) cultivars. The main objectives of this study were to evaluate the molecular basis that contribute to this difference in strawberry cultivars and to identify potential biomarkers that can be used to facilitate the development of new strawberry cultivars with improved overwintering hardiness. With these goals in mind, the freezing tolerance was examined for four cultivars, ‘Jonsok’, ‘Senga Sengana’, ‘Elsanta’, and ‘Frida’ (listed from most to least freezing tolerant based on survival from physiological freezing experiments) and the protein expression was investigated in the overwintering relevant crown structure of strawberry. Biomarker selection was based on comparing the protein profiles from the most cold-tolerant cultivar, ‘Jonsok’ with the least cold-tolerant cultivar ‘Frida’ in a comprehensive investigation using two label-free global proteomic methods, shotgun and two dimensional electrophoresis, with support from univariate and multivariate analysis. A total of 143 proteins from shotgun and 64 proteins from 2DE analysis were identified as significantly differentially expressed between ‘Jonsok’ and ‘Frida’ at one or more time points during the cold treatment (0, 2, and 42 days at 2 ºC). These proteins included molecular chaperones, antioxidants/detoxifying enzymes, metabolic enzymes, pathogenesis related proteins and flavonoid pathway proteins. The proteins that contributed to the greatest differences between ‘Jonsok’ and ‘Frida’ are candidates for biomarker development. The novel and significant aspects of this work include the first crown proteome 2DE map with general characteristics of the strawberry crown proteome, a list of potential biomarkers to facilitate the development of new strawberry cultivars with improved cold stress tolerance.
Conference papers on the topic "Overwintering survival"
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Mercer, Nathan. "Influence of food supplementation during overwintering on the survival ofHippodamia convergensadults." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.113931.
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Alaux, Cedric. "Integrating landscape ecology and insect physiology: The case of overwintering survival in honey bees." In 2016 International Congress of Entomology. Entomological Society of America, 2016. http://dx.doi.org/10.1603/ice.2016.109688.
Full textReports on the topic "Overwintering survival"
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DeSante, David F., James F. Saracco, and Danielle R. Kaschube. Modeling Overwintering Survival of Declining Landbirds: The 2004-05 Annual Report of the Monitoring Avian Winter Survival (MAWS) Program on four DoD Installations in Southeastern United States. Fort Belvoir, VA: Defense Technical Information Center, September 2005. http://dx.doi.org/10.21236/ada541505.
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