Sammanfattning

Cytoplasmically male-sterile (CMS) carrot cultivars suffer from low pollination rates. In this study, insect visitation varied more than eightfold between 17 CMS carrot cultivars in a field-based cultivar evaluation trial. The visitation rates of honey bees, nectar scarabs, muscoid flies, and wasps each significantly differed among these cultivars. No significant difference in visitation rates was observed among cultivars of different CMS type (brown-anther or petaloid) or flower colour, but cultivars of Berlicumer root type had significantly higher insect visitation rates than Nantes. Six cultivars were further compared in regard to selected umbel traits: as umbel diameter increased, so did the visitation of soldier beetles, while that of honey bees decreased. Finally, nectar of these six cultivars was analysed for sugar content, which revealed monosaccharides to be the most common sugars in all. There was high variation in the levels of sugars from individual umbellets but no significant difference in nectar sugar composition among cultivars, suggesting that nectar sugar composition is of minor importance regarding pollinator attraction to hybrid CMS carrot umbels.

Nyckelord

crop carrot; hybrid; honey bee; pollination

Publicerad i

Insects
2020, Volym: 11, nummer: 7, artikelnummer: 402
Utgivare: MDPI

SLU författare

• Bohman, Björn

  • Institutionen för växtskyddsbiologi, Sveriges lantbruksuniversitet
    
  • University of Western Australia

UKÄ forskningsämne

Botanik
Ekologi


Publikationens identifierare

DOI: https://doi.org/10.3390/insects11070402

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/107346