A preliminary evaluation of the effects of pollinator enhancement and gibberellins on the fruit set and fruit shape of ‘Conference’ pears – Short Communication


Smessaert J., van Kemenade G., Arnoys A., Honnay O., Keulemans W. (2020): A preliminary evaluation of the effects of pollinator enhancement and gibberellins on the fruit set and fruit shape of ‘Conference’ pears – Short Communication. Hort. Sci. (Prague), 47: 211–216.

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‘Conference’ (Pyrus communis L.) is a self-incompatible cultivar, although it can also set fruit parthenocarpically. Stimulating parthenocarpy through gibberellin (GA) applications increases the fruit set, but it may also negatively affect the fruit size and shape. The aim of this study was to investigate the effects of a bumblebee (BB) amendment in combination with a GA treatment on the fruit set and fruit shape of ‘Conference’ pears. In the first experiment, we applied three treatments (GA, GA + BB & control) in a ‘Conference’ monoculture. In the second experiment, we applied two treatments (GA & GA + BB) in a ‘Conference’ orchard inter-planted with ‘Concorde’ as pollinizer trees. Both experiments showed that the GA application and bumblebee supplementation did not affect the fruit set. However, the BB treatment resulted in significantly higher amounts of normally shaped pears. Trees closer to the bumblebee hive had more normal shaped pears than trees further away.

Deckers T., Schoofs H. (2002): Improvement of fruit set on young pear trees cultivar conference with gibberellins. Acta Horticulturae (ISHS), 596: 735–743. https://doi.org/10.17660/ActaHortic.2002.596.126
Free J.B. (1993): Insect Pollination of Crops (2nd Ed.). London, Academic Press.
Geslin B., Aizen M.A., Garcia N., Pereira A.J., Vaissière B.E., Garibaldi L.A. (2017): The impact of honey bee colony quality on crop yield and farmers’ profit in apples and pears. Agriculture, Ecosystems & Environment, 248: 153–161.
Jacquemart A.-L., Michotte-Van Der Aa A., Raspé O. (2006): Compatibility and pollinator efficiency tests on Pyrus communis L. cv. ‘Conference.’ Journal of Horticultural Science and Biotechnology, 81: 827–830. https://doi.org/10.1080/14620316.2006.11512145
Kemp H., Koskela E., Van Dieren M.C.A., Maas F.M. (2008): Selected Pyrus genotypes as pollinizers for Pyrus communis cultivars. Acta Horticulturae (ISHS), 800: 189–197. https://doi.org/10.17660/ActaHortic.2008.800.20
Lundberg H. (1980): Effects of weather on foraging-flights of bumblebees (Hymenoptera, Apidae) in a subalpine/alpine area. Holarctic Ecology, 3: 104–110. https://doi.org/10.1111/j.1600-0587.1980.tb00715.x
Moriya Y., Takai Y., Okada K., Ito D., Shiozaki Y., Nakanishi T., Takasaki T. (2005): Parthenocarpy and self- and cross-incompatibility in ten European pear cultivars. Journal of the Japanese Society for Horticultural Science, 74: 424–430. https://doi.org/10.2503/jjshs.74.424
Potts S.G., Biesmeijer J.C., Kremen C., Neumann P., Schweiger O., Kunin W.E. (2010): Global pollinator declines: trends, impacts and drivers. Trends in Ecology & Evolution, 25: 345–353.
Quinet M., Jacquemart A.L. (2015): Differences between pollination and parthenocarpy in the ‘Conference’ pear. Acta Horticulturae (ISHS), 1094: 359–366. https://doi.org/10.17660/ActaHortic.2015.1094.45
Quinet M., Warzée M., Vanderplanck M., Michez D., Lognay G., Jacquemart A.L. (2016): Do floral resources influence pollination rates and subsequent fruit set in pear (Pyrus communis L.) and apple (Malus × domestica Borkh) cultivars? European Journal of Agronomy, 77: 59–69.
Silva L., Herrero M., Oliveira C.M. (2008): Effects of gibberellic acid and pollination on fruit set and fruit quality in “Rocha” pear. Acta Horticulturae (ISHS), 800: 199–203. https://doi.org/10.17660/ActaHortic.2008.800.21
Stern R.A., Goldway M., Zisovich A.H., Shafir S., Dag A. (2004): Sequential introduction of honeybee colonies increases cross-pollination, fruit-set and yield of ‘Spadona’ pear (Pyrus communis L.). Journal of Horticultural Science and Biotechnology, 79: 652–658. https://doi.org/10.1080/14620316.2004.11511821
Vercammen J., Gomand A. (2008): Fruit set of ‘Conference’: A small dose of Gibberellins or Regalis. Acta Horticulturae (ISHS), 800: 131–138. https://doi.org/10.17660/ActaHortic.2008.800.11
Vercammen J., Gomand A., Goossens H. (2011): Cultivar Testing of pears in Belgium. Acta Horticulturae (ISHS), 909: 171–176. https://doi.org/10.17660/ActaHortic.2011.909.17
Warnier O. (2000): Quel est l’interet d’une pollinisation croisee pour la poire Conference. Le Fruit Belge, 484: 47–50. (in French)
Zhang C., Lee U., Tanabe K. (2008): Hormonal regulation of fruit set, parthenogenesis induction and fruit expansion in Japanese pear. Plant Growth Regulation, 55: 231–240. https://doi.org/10.1007/s10725-008-9279-2
Zisovich A., Goldway M., Schneider D., Steinberg S., Stern E., Stern R.A., Sde-Eliyahu K. (2012): Adding bumblebees (Bombus terrestris L., Hymenoptera: Apidae) to pear orchards increases seed number per fruit, fruit set, fruit size and yield. Journal of Horticultural Science and Biotechnology, https://doi.org/10.1080/14620316.2012.11512876
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