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  1. Book ; Online ; E-Book: Promoting pollination and pollinators in farming

    Kevan, Peter / Willis Chan, Susan

    (Burleigh Dodds series in agricultural science ; number 126)

    2023  

    Abstract: Intro -- Promoting pollination and pollinators in farming -- Part 1 Understanding pollinators and pollination -- Chapter 1 What is pollination and what are pollinators in agriculture? -- 1 Introduction -- 2 The basics of pollination -- 3 Pollinators and ... ...

    Author's details edited by Peter Kevan and Susan Willis Chan
    Series title Burleigh Dodds series in agricultural science ; number 126
    Collection
    Abstract Intro -- Promoting pollination and pollinators in farming -- Part 1 Understanding pollinators and pollination -- Chapter 1 What is pollination and what are pollinators in agriculture? -- 1 Introduction -- 2 The basics of pollination -- 3 Pollinators and their diversity -- 4 The ecology and evolution of floral traits -- 5 Domestication and its impact on plant-pollinator relationships -- 6 How do pollinators impact agriculture? -- 7 Modern agriculture and pollinators -- 8 Conclusion -- 9 Where to look for further information -- 10 References -- Chapter 2 The role and application of olfaction in crop plant-pollinator interactions -- 1 Introduction -- 2 Key challenges -- 3 Case studies -- 4 Summary -- 5 Future trends -- 6 Conclusion -- 7 Where to look for further information -- 8 References -- Chapter 3 The role of wind pollination in crop plants -- 1 Introduction -- 2 Fundamental mechanisms of wind pollination -- 3 Wind pollination and transgenic risks in grass crop species -- 4 Promoting wind pollination in open-pollinated crop species -- 5 Conclusion and future trends -- 6 References -- Part 2 Threats to pollinators -- Chapter 4 Assessing climate change impacts on pollinators -- 1 Introduction -- 2 Challenges anthropogenic climate change poses to pollinators -- 3 Advancing our understanding of climate change impacts on pollinators -- 4 Conserving pollinators under climate change -- 5 Conclusion -- 6 Where to look for further information -- 7 References -- Chapter 5 Assessing the impact of disease on pollinators -- 1 Introduction -- 2 A bestiary of honey bee diseases -- 3 The poorly known wild bee diseases -- 4 Disease transmission, spillover and spillback -- 5 Defence mechanisms of bees -- 6 Synergies with other risk factors -- 7 Prevention of diseases -- 8 Future trends -- 9 Where to look for further information -- 10 References.
    Keywords Electronic books
    Language English
    Size 1 Online-Ressource (415 Seiten)
    Publisher Burleigh Dodds Science Publishing Limited
    Publishing place Cambridge
    Publishing country Great Britain
    Document type Book ; Online ; E-Book
    Note Description based on publisher supplied metadata and other sources
    Remark Zugriff für angemeldete ZB MED-Nutzerinnen und -Nutzer
    HBZ-ID HT021725113
    ISBN 978-1-80146-101-6 ; 978-1-80146-100-9 ; 9781801460989 ; 1-80146-101-5 ; 1-80146-100-7 ; 1801460981
    Database ZB MED Catalogue: Medicine, Health, Nutrition, Environment, Agriculture

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  2. Article ; Online: Promoting Pollination and Pollinators in Farming

    Kevan Peter / Chan Susan Willis

    Journal of Apicultural Science, Vol 67, Iss 2, Pp 147-

    2023  Volume 147

    Keywords Zoology ; QL1-991
    Language English
    Publishing date 2023-12-01T00:00:00Z
    Publisher Sciendo
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Apivectoring of entomopathogen, Beauveria bassiana strain GHA for suppression of thrips on commercial greenhouse strawberries: a real life study

    Coates, Charlotte E. R. / Labbé, Roselyne / Gagnier, Dana / Laflair, Andrew / Kevan, Peter G.

    BioControl. 2023 Apr., v. 68, no. 2 p.143-154

    2023  

    Abstract: The cultivation of strawberries within greenhouse environments is an increasingly common area of agricultural productivity, affording consistent fruit production of an otherwise highly seasonal crop. However, due to its relative novelty, few management ... ...

    Abstract The cultivation of strawberries within greenhouse environments is an increasingly common area of agricultural productivity, affording consistent fruit production of an otherwise highly seasonal crop. However, due to its relative novelty, few management tools have been identified, assessed or registered to date for control of the many known pests of greenhouse grown strawberry crops. This includes evaluation of biocontrol strategies such as apivectoring, whereby microbial agents known to suppress crop pests are dispersed by commercially available pollinating bumblebees, Bombus impatiens (Cresson 1863) (Hymenoptera: Apidae). Towards addressing the need for such tools, this study evaluated the impacts of three periods of apivectoring in a commercial greenhouse strawberry production facility to determine how well the conidia of entomopathogen, Beauveria bassiana (Bals.-Criv. Vuill 1912), would be disseminated for control of crop pests such as the western flower thrips, Frankliniella occidentalis (Pergrande) (Thysanoptera: Thripidae). Our results indicate that bumblebees effectively dispersed a formulation of B. bassiana throughout the greenhouse crop, with the entomopathogen being detected on multiple flowers, leaves, and fruit. Furthermore, the impact of this tool on the quality of fruit produced, as well as possible adverse effects of the entomopathogen on carrier bumblebees were also evaluated. The B. bassiana formulation had minimal impacts on bumblebee populations, with under 16% mortality attributed to infection by B. bassiana. Through population monitoring, we found that naturally occurring thrips were being suppressed by the apivectoring biocontrol strategy, with up to 75% of Frankliniella occidentalis collected from some treatment zones testing positive for infection by B. bassiana.
    Keywords Beauveria bassiana ; Bombus impatiens ; Frankliniella occidentalis ; agricultural productivity ; biological control ; conidia ; entomopathogens ; fruit quality ; fruits ; greenhouses ; mortality ; strawberries
    Language English
    Dates of publication 2023-04
    Size p. 143-154.
    Publishing place Springer Netherlands
    Document type Article ; Online
    ZDB-ID 1452737-6
    ISSN 1573-8248 ; 1386-6141
    ISSN (online) 1573-8248
    ISSN 1386-6141
    DOI 10.1007/s10526-023-10189-3
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 1420: Show issues

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  4. Article: Short communication: thermal regimes in hollow stems of herbaceous plants—concepts and models

    Kevan, Peter G / Patrícia Nunes-Silva / Rangarajan Sudarsan

    International journal of biometeorology. 2018 Nov., v. 62, no. 11

    2018  

    Abstract: Although there have been studies of the temperature regimes within flowers, micrometeorology within stems seems to have been overlooked. We present ideas, hypotheses, and a diagrammatic model on the biophysical and thermodynamic processes that interact ... ...

    Abstract Although there have been studies of the temperature regimes within flowers, micrometeorology within stems seems to have been overlooked. We present ideas, hypotheses, and a diagrammatic model on the biophysical and thermodynamic processes that interact in complex ways to result in elevated temperature regimes within hollow stems of herbaceous plants. We consider the effects of the ambient air around the stems, the possible importance of insolation, and greenhouse effects as influenced by stems’ orientation and optical properties, i.e., reflection, absorption, emissivity, translucence, pigmentation, and thermal conductivity. We propose that greenhouse effects contribute significantly to and are influenced by the above phenomena as well as by the gross anatomy (volume:surface ratio; wall thickness), evapotranspiration, and the thermal properties of the gas mixture in the lumen. We provide examples of those elevated temperatures that can be several degrees Celsius above the temperature of the surrounding atmosphere.
    Keywords absorption ; air ; bioclimatology ; evapotranspiration ; flowers ; greenhouse effect ; herbaceous plants ; micrometeorology ; models ; optical properties ; pigmentation ; solar radiation ; stems ; temperature ; thermal conductivity
    Language English
    Dates of publication 2018-11
    Size p. 2057-2062.
    Publishing place Springer Berlin Heidelberg
    Document type Article
    ZDB-ID 127361-9
    ISSN 0067-8902 ; 0020-7128
    ISSN 0067-8902 ; 0020-7128
    DOI 10.1007/s00484-018-1602-7
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Cologne/Königswinter

    Se 235: Show issues Location:
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    bis Jg. 2021: Bestellungen von Artikeln über das Online-Bestellformular
    ab Jg. 2022: Lesesaal (EG)

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  5. Article: In situ calibration of an uncooled thermal camera for the accurate quantification of flower and stem surface temperatures

    Byerlay, Ryan A.E / Coates, Charlotte / Aliabadi, Amir A / Kevan, Peter G

    Thermochimica acta. 2020 Nov., v. 693

    2020  

    Abstract: This paper presents an in situ calibration method for an uncooled thermal camera to reduce bias and root mean square error (RMSE) for the observed surface temperatures of Gerbera jamesonii plants. Surface temperature bias and RMSE were quantified for the ...

    Abstract This paper presents an in situ calibration method for an uncooled thermal camera to reduce bias and root mean square error (RMSE) for the observed surface temperatures of Gerbera jamesonii plants. Surface temperature bias and RMSE were quantified for the calibrated camera constants and compared with respect to the default constant statistics. The averaged calibrated camera constant bias and RMSE values decreased by at least 89.1% relative to the averaged default camera constant bias and RMSE values for individual plant stems and flowers. This calibration approach has the potential to be suitable for other uncooled thermal cameras in fields beyond horticultural applications.
    Keywords Gerbera jamesonii ; bias ; calibration ; cameras ; fields ; flowers ; horticulture ; paper ; statistics ; stems ; surface temperature
    Language English
    Dates of publication 2020-11
    Publishing place Elsevier B.V.
    Document type Article
    Note NAL-light
    ZDB-ID 1500974-9
    ISSN 0040-6031
    ISSN 0040-6031
    DOI 10.1016/j.tca.2020.178779
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  6. Article ; Online: Short communication: thermal regimes in hollow stems of herbaceous plants-concepts and models.

    Kevan, Peter G / Nunes-Silva, Patrícia / Sudarsan, Rangarajan

    International journal of biometeorology

    2018  Volume 62, Issue 11, Page(s) 2057–2062

    Abstract: Although there have been studies of the temperature regimes within flowers, micrometeorology within stems seems to have been overlooked. We present ideas, hypotheses, and a diagrammatic model on the biophysical and thermodynamic processes that interact ... ...

    Abstract Although there have been studies of the temperature regimes within flowers, micrometeorology within stems seems to have been overlooked. We present ideas, hypotheses, and a diagrammatic model on the biophysical and thermodynamic processes that interact in complex ways to result in elevated temperature regimes within hollow stems of herbaceous plants. We consider the effects of the ambient air around the stems, the possible importance of insolation, and greenhouse effects as influenced by stems' orientation and optical properties, i.e., reflection, absorption, emissivity, translucence, pigmentation, and thermal conductivity. We propose that greenhouse effects contribute significantly to and are influenced by the above phenomena as well as by the gross anatomy (volume:surface ratio; wall thickness), evapotranspiration, and the thermal properties of the gas mixture in the lumen. We provide examples of those elevated temperatures that can be several degrees Celsius above the temperature of the surrounding atmosphere.
    MeSH term(s) Canada ; Magnoliopsida ; Microclimate ; Models, Theoretical ; Plant Stems ; Temperature
    Language English
    Publishing date 2018-09-12
    Publishing country United States
    Document type Journal Article
    ZDB-ID 280324-0
    ISSN 1432-1254 ; 0020-7128
    ISSN (online) 1432-1254
    ISSN 0020-7128
    DOI 10.1007/s00484-018-1602-7
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 998: Show issues Location:
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    Jg. 1995 - 2021: Lesesall (1.OG)
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  7. Article ; Online: Conditional discrimination and response chains by worker bumblebees (Bombus impatiens Cresson, Hymenoptera: Apidae).

    Mirwan, Hamida B / Kevan, Peter G

    Animal cognition

    2015  Volume 18, Issue 5, Page(s) 1143–1154

    Abstract: We trained worker bumblebees to discriminate arrays of artificial nectaries (one, two, and three microcentrifuge tubes inserted into artificial flowers) from which they could forage in association with their location in a three-compartmental maze. ... ...

    Abstract We trained worker bumblebees to discriminate arrays of artificial nectaries (one, two, and three microcentrifuge tubes inserted into artificial flowers) from which they could forage in association with their location in a three-compartmental maze. Additionally, we challenged bees to learn to accomplish three different tasks in a fixed sequence during foraging. To enter the main three-compartmented foraging arena, they had first to slide open doors in an entry box to be able to proceed to an artificial flower patch in the main arena where they had to lift covers to the artificial nectaries from which they then fed. Then, the bees had to return to the entrance way to their hive, but to actually enter, were challenged to rotate a vertically oriented disc to expose the entry hole. The bees were adept at associating the array of nectaries with their position in the compartmental maze (one nectary in compartment one, two in two, and three in three), taking about six trials to arrive at almost error-free foraging. Over all it took the bees three days of shaping to become more or less error free at the multi-step suite of sequential task performances. Thus, they had learned where they were in the chain sequence, which array and in which compartment was rewarding, how to get to the rewarding array in the appropriate compartment, and finally how to return as directly as possible to their hive entrance, open the entrance, and re-enter the hive. Our experiments were not designed to determine the specific nature of the cues the bees used, but our results strongly suggest that the tested bees developed a sense of subgoals that needed to be achieved by recognizing the array of elements in a pattern and possibly chain learning in order to achieve the ultimate goal of successfully foraging and returning to their colony. Our results also indicate that the bees had organized their learning by a hierarchy as evidenced by their proceeding to completion of the ultimate goal without reversing their foraging paths so as to return to the colony without food.
    MeSH term(s) Animals ; Appetitive Behavior ; Bees/physiology ; Discrimination (Psychology) ; Discrimination Learning
    Language English
    Publishing date 2015-09
    Publishing country Germany
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1466332-6
    ISSN 1435-9456 ; 1435-9448
    ISSN (online) 1435-9456
    ISSN 1435-9448
    DOI 10.1007/s10071-015-0887-8
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  8. Article ; Online: The thermal ecology of flowers.

    van der Kooi, Casper J / Kevan, Peter G / Koski, Matthew H

    Annals of botany

    2019  Volume 124, Issue 3, Page(s) 343–353

    Abstract: Background: Obtaining an optimal flower temperature can be crucial for plant reproduction because temperature mediates flower growth and development, pollen and ovule viability, and influences pollinator visitation. The thermal ecology of flowers is an ... ...

    Abstract Background: Obtaining an optimal flower temperature can be crucial for plant reproduction because temperature mediates flower growth and development, pollen and ovule viability, and influences pollinator visitation. The thermal ecology of flowers is an exciting, yet understudied field of plant biology.
    Scope: This review focuses on several attributes that modify exogenous heat absorption and retention in flowers. We discuss how flower shape, orientation, heliotropic movements, pubescence, coloration, opening-closing movements and endogenous heating contribute to the thermal balance of flowers. Whenever the data are available, we provide quantitative estimates of how these floral attributes contribute to heating of the flower, and ultimately plant fitness.
    Outlook: Future research should establish form-function relationships between floral phenotypes and temperature, determine the fitness effects of the floral microclimate, and identify broad ecological correlates with heat capture mechanisms.
    MeSH term(s) Ecology ; Flowers ; Plants ; Pollen ; Pollination ; Reproduction
    Language English
    Publishing date 2019-06-15
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't ; Research Support, U.S. Gov't, Non-P.H.S. ; Review
    ZDB-ID 1461328-1
    ISSN 1095-8290 ; 0305-7364
    ISSN (online) 1095-8290
    ISSN 0305-7364
    DOI 10.1093/aob/mcz073
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  9. Article ; Online: Recording animal-view videos of the natural world using a novel camera system and software package.

    Vasas, Vera / Lowell, Mark C / Villa, Juliana / Jamison, Quentin D / Siegle, Anna G / Katta, Pavan Kumar Reddy / Bhagavathula, Pushyami / Kevan, Peter G / Fulton, Drew / Losin, Neil / Kepplinger, David / Yetzbacher, Michael K / Salehian, Shakiba / Forkner, Rebecca E / Hanley, Daniel

    PLoS biology

    2024  Volume 22, Issue 1, Page(s) e3002444

    Abstract: Plants, animals, and fungi display a rich tapestry of colors. Animals, in particular, use colors in dynamic displays performed in spatially complex environments. Although current approaches for studying colors are objective and repeatable, they miss the ... ...

    Abstract Plants, animals, and fungi display a rich tapestry of colors. Animals, in particular, use colors in dynamic displays performed in spatially complex environments. Although current approaches for studying colors are objective and repeatable, they miss the temporal variation of color signals entirely. Here, we introduce hardware and software that provide ecologists and filmmakers the ability to accurately record animal-perceived colors in motion. Specifically, our Python codes transform photos or videos into perceivable units (quantum catches) for animals of known photoreceptor sensitivity. The plans and codes necessary for end-users to capture animal-view videos are all open source and publicly available to encourage continual community development. The camera system and the associated software package will allow ecologists to investigate how animals use colors in dynamic behavioral displays, the ways natural illumination alters perceived colors, and other questions that remained unaddressed until now due to a lack of suitable tools. Finally, it provides scientists and filmmakers with a new, empirically grounded approach for depicting the perceptual worlds of nonhuman animals.
    MeSH term(s) Animals ; Lighting ; Motion ; Software
    Language English
    Publishing date 2024-01-23
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2126776-5
    ISSN 1545-7885 ; 1544-9173
    ISSN (online) 1545-7885
    ISSN 1544-9173
    DOI 10.1371/journal.pbio.3002444
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    In stock of ZB MED Cologne/Königswinter

    Zs.A 6193: Show issues Location:
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  10. Book ; Online: Preface

    Kevan, Peter G.

    2012  

    Keywords Text ; ddc:630
    Language English
    Publishing date 2012-10-04
    Publisher Julius Kühn-Institut
    Publishing country de
    Document type Book ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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