Article Sidebar
Main Article Content
Abstract
In Central Europe, Helianthus tuberosus L. is a late summer/autumn bloomer (August/November). The disc florets produce both nectar and pollen. Floral reward is available in male-phase flowers (pollen and nectar) and in female-phase flowers (nectar). The floral reward is attractive to a variety of insect visitors (honey bees, wasps, flies and butterflies). The season of blooming as well as the total sugar yield (25.4 – 47.4 kg ha–1) and pollen yield (57.8 – 212.7 kg ha–1) indicate that H. tuberosus is important in the enhancement of food resources for pollinators. The generative reproduction in H. tuberosus is impaired (the species does not set seeds/fruits). However, due to its attractiveness for a variety of pollinators in both rural and urban areas, the spread of H. tuberosus should be monitored. Moreover, its propagation needs to be attended with restrictions.
Keywords
Article Details
Acta Botanica Croatica is an Open Access journal with minimal restrictions regarding content reuse. Immediately after publishing, all content becomes freely available to anyone for unlimited use and distribution, under the sole condition that the author(s) and the original source are properly attributed according to the Creative Commons Attribution 4.0 International License (CC BY 4.0).
CC BY 4.0 represents the highest level of Open Access, which maximizes dissemination of scholarly work and protects the rights of its authors. In Acta Botanica Croatica, authors hold the copyright of their work and retain unrestricted publishing rights.
By approving final Proof the authors grant to the publisher exclusive license to publish their article in print and on-line, in accordance with the Creative Commons Attribution (CC-BY-4.0) license.