Thesis
New host plants and the predicted range of the lily leaf beetle, Lilioceris Lilii (Coleoptera: Chrysomelidae) in western North America
Washington State University
Master of Science (MS), Washington State University
12/2019
DOI:
https://doi.org/10.7273/000003983
Handle:
https://hdl.handle.net/2376/124577
Abstract
The lily leaf beetle, Lilioceris lilii (Scopoli, 1763) (Coleoptera: Chrysomelidae), is an introduced Eurasian pest of true lilies (Lilium spp.) and other genera in the Liliaceae. The lily leaf beetle became established in North America near Montreal, Canada, in 1943, presumably transported on Asiatic lilies imported from Europe. The species began to expand its range rapidly after the early 1990s, and is now established in nine Canadian provinces and at least fourteen states. The beetle was detected in Bellevue, Washington, in 2011, the first occurrence of L. lilii west of the Rocky Mountains. The lily leaf beetle is known to utilize 87 species of cultivated and native Lilium, 5 species of Fritillaria, and one species of Cardiocrinum. On the East Coast, L. lilii has expanded its host plant use to the native species Lilium canadense, Lilium michiganense, and Streptopus lanceolatus. This study explored the potential vulnerability of Liliaceae species native to western North America to depredation by L. lilioceris. Chapter 1 investigates the host suitability of several Liliaceae, including the exclusively western genus Calochortus. Oviposition and larval feeding and development on Calochortus tolmiei, Fritillaria affinis, Lilium columbianum, and Prosartes hookeri were assessed under laboratory and common garden conditions. The beetle was unable to use P. hookeri in these experiments, but readily consumed and developed upon L. columbianium. Beetle larvae were also able to develop on C. tolmei and F. affinis, although evidence suggests these are less suitable hosts. Chapter 2 predicts the future range of L. lilii in North America. A habitat suitability model was built based on presence data and climate variables from the beetle's native and invaded range. The model predicts that much of North America is suitable habitat, and when combined with host plant presence data, indicates that many native plant species could be impacted as the beetle expands its range.
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Details
- Title
- New host plants and the predicted range of the lily leaf beetle, Lilioceris Lilii (Coleoptera: Chrysomelidae) in western North America
- Creators
- Margaret Marie Freeman
- Contributors
- David William Crowder (Advisor) - Washington State University, Department of Entomology
- Awarding Institution
- Washington State University
- Academic Unit
- Department of Entomology
- Theses and Dissertations
- Master of Science (MS), Washington State University
- Publisher
- Washington State University
- Identifiers
- 99900890802501842
- Language
- English
- Resource Type
- Thesis