Factors influencing flight activity of Apis florea F., an important pollinator of Daucus carota L.

publication date: Jun 30, 2006
Send a summary of this page to someone via email.

The files are all saved as high resolution and quality, print-ready Adobe Acrobat v6 PDF files. You may have problems viewing them using older versions of the reader software; if this is the case, the free reader software is available here. If you right click on the download link and select 'Save Target As' you can then download the file to your hard disk. Alternatively, if you just click on the link, each file will open up in a new window - should you need to save it, click on the 'save file' icon that appears in the menu bar in your browser (it should look like a floppy disk), or choose file>save from the menu.

Journal Name   Journal of Apicultural Research
Article Title   Factors influencing flight activity of Apis florea F., an important pollinator of Daucus carota L.
Author(s)   D P Abrol
Volume   45
Issue   2
     
Published Date   6/30/2006
Pages   2 to 6
Abstract   Foraging ecology of insect pollinators visiting carrot flowers (Daucus carota L.) was studied in relation to five environmental variables. The dwarf honeybee Apis florea L. was the most abundant flower visitor and comprised more than 94% of flower visiting insects. Commencement of flight activity occurred when a minimum threshold of environmental variables was surpassed, while cessation was governed mainly by declining values of light intensity and radiation. In between commencement and cessation, the foraging population correlated significantly and positively with air temperature, light intensity, solar radiation and nectar-sugar concentration and negatively with relative humidity. Path coefficient analysis, however, revealed that the direct effect of temperature was high and positive followed by light intensity and solar radiation while the direct effect of relative humidity was high and negative. The direct effect of nectar-sugar concentration was negative and negligible. Path coefficient analysis gave a more comprehensive picture of effects than did simple correlation analysis. Apis florea on average visited 1.14 0.23 and 22.78 2.57 umbels and flowers/min, respectively, during different hours of the day. Furthermore, the insect pollinated plots produced significantly more seeds with heavier weights than those isolated from insect visits.
Keywords   Daucus carota, honeybees, environmental factors, pollination, seed yield, path analysis
Download   Click here to download the PDF