Effects of visual silhouette, leaf size and host species on feeding preference by adult emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae)
- Download PDF (256.0 KB)
- This publication is available only online.
The Great Lakes Entomologist. 42 (1&2): 62-71.
The emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae) is an invasive species recently established in North America. In large arena bioassays, when given a choice among live green ash, Fraxinus pennsylvanica Marsh and artificial ash saplings that were hidden or exposed from view, beetles preferred live trees (either visible or hidden) compared to artificial trees that had similar visual silhouettes, confirming that olfactory cues are used to locate hosts. Examination of the effect of leaf size revealed that large leaves attracted more beetles than medium-sized leaves that in turn attracted more beetles than small leaves of the same age. Beetles also consumed more of the large leaves in terms of total leaf area than either medium or small leaves, but the proportion of foliage that beetles consumed relative to total available leaf area, did not differ. When newly emerged adults were fed on green and Manchurian ash, Fraxinus mandshurica Rupr., foliage in a no-choice assay, beetles that were given green ash consumed significantly more foliage compared to those that fed on Manchurian ash, but neither longevity nor beetle body weight differed. Our results suggest that while beetles might use olfactory cues to identify suitable hosts, visual cues also play a role in landing and feeding behavior. Manchurian ash might have greater nutritive value or resistance than green ash, necessitating lower consumption and therefore less damage in nature.
Pureswaran, Deepa S.; Poland, Therese M. 2009. Effects of visual silhouette, leaf size and host species on feeding preference by adult emerald ash borer, Agrilus planipennis Fairmaire (Coleoptera: Buprestidae). The Great Lakes Entomologist. 42 (1&2): 62-71.