Why eat extrafloral nectar? Understanding food selection by Coleomegilla maculata (Coleoptera: Coccinellidae)
Project Author
Issue Date
2012-12-20
Authors
Choate, Beth A.
Lundgren, Jonathan G.
Loading...
Embargo
First Reader
Additional Readers
Keywords
Omnivore , Coleoptera , Coccinellidae , Extrafloral nectar , Lady beetle , Sugar feeding
Distribution
Abstract
Methods of increasing predator abundance within a habitat include the incorporation of non-prey food items, yet the influence of this on predation intensity toward herbivores remains unknown. In order to gain an understanding of nectar feeding in the predaceous beetle, Coleomegilla maculata (DeGeer), laboratory studies were conducted evaluating prey consumption in the presence of extrafloral nectaries. The physiology of beetles with access to prey only and a mixed diet were compared. To elucidate results of beetle physiology, Y-tube olfactometer studies were conducted and preferences between food types evaluated. Coleomegilla maculata females consumed 9 % fewer aphids when nectar was available. Lipid and glycogen content, as well as oocyte volume were not increased upon consumption of a mixed diet. Evaluation of predator behavior when offered both food resources together and separately demonstrated that extrafloral nectaries are attractive.
Description
Chair
Major
Department
Biology
Recorder
License
This article was accepted and published in BioControl (2013), Choate and Lundgren. All rights reserved. The published version of this document is located at https://doi.org/10.1007/s10526-012-9501-z.
Citation
Choate, B. and Lundgren, J.G. (2012). Why eat extrafloral nectar? Understanding food selection by Coleomegilla maculata (Coleoptera: Coccinellidae). BioControl, 25: 359-367
Version
Published article
Honors
Publisher
International Organization for Biological Control (outside the USA).