Moderate pollination limitation in some entomophilous crops of Europe

John M. Holland*, Louis Sutter, Matthias Albrecht, Philippe Jeanneret, Sonja C. Pfister, Jens Schirmel, Martin H. Entling, Riina Kaasik, Gabriella Kovacs, Eve Veromann, Agustín M. Bartual, Simone Marini, Anna Camilla Moonen, Márk Szalai, Herman Helsen, Karin Winkler, Marjolein E. Lof, Wopke van der Werf, Niamh M. McHugh, Barbara M. SmithDavid W. Wallis, James E. Cresswell

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review


Pollination services to crops may be worsening because of declines in farmland pollinators, but the consequences for yields have been uncertain. We therefore investigated pollination limitation in four entomophilous crops (oilseed rape, sunflower, pears and pumpkin) by quantifying the difference in harvestable mass between open-pollinated and saturation-pollinated (hand-pollinated) flowers. We also examined whether pollination limitation in the four crops was associated with the number of flower visits by insects. Across 105 commercial fields in six European countries, the average decrease in harvestable mass due to pollination limitation was 2.8 % (SE = 1.15). Among crops, the highest decreases were in sunflowers (8%) and in one of three oilseed rape production regions (6%). We observed substantial variation among crops in the numbers of insect visits received by flowers, but it did not significantly correspond with the levels of pollination limitation. Our results suggest that yields in these crops were not severely pollination-limited in the regions studied and that other factors besides visitation by pollinators influenced the degree of pollination limitation.

Original languageEnglish
Article number107002
JournalAgriculture, Ecosystems and Environment
Publication statusPublished - 15 Oct 2020


  • Agroecology
  • Crop yield
  • Entomophilous crops
  • Landscape ecology
  • Pollination
  • Pollinators

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