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It is not all about being sweet: differences in floral traits and insect visitation among hybrid carrot cultivars

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Gaffney, A, Bohman, B, Quarrell, SR ORCID: 0000-0003-1112-4140, Brown, PH and Allen, GR 2020 , 'It is not all about being sweet: differences in floral traits and insect visitation among hybrid carrot cultivars' , Insects, vol. 11, no. 7 , pp. 1-13 , doi: 10.3390/insects11070402.

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Abstract

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.

Item Type: Article
Authors/Creators:Gaffney, A and Bohman, B and Quarrell, SR and Brown, PH and Allen, GR
Keywords: crop carrot, hybrid, honey bee, pollination, entomology
Journal or Publication Title: Insects
Publisher: MDPI
ISSN: 2075-4450
DOI / ID Number: 10.3390/insects11070402
Copyright Information:

Copyright 2020 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

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