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Funded Project |
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Funding Program:
IPM Partnership Grants |
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Project Title:
Lily Host Resistance to Lily Leaf Beetle, Lilioceris lilii |
Project Directors (PDs):
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Lead State: ME Lead Organization: University of Maine |
| Undesignated Funding: $7,627 |
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Start Date: May-15-2007 End Date: Dec-15-2007 |
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Pests Involved: lily leaf beetles |
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Site/Commodity: flowers, ornamentals, nurseries, greenhouses |
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Summary:
The lily leaf beetle (LLB), Lilioceris lilii Scapoli, is a serious pest of native and exotic lilies in much of New England and has been attributed to economic losses for commercial horticulturists. Garden lilies (Lilium spp. and hybrids) are a popular and unique addition to gardeners' summer and early fall perennial gardens. They also constitute an important commercial commodity for bulb growers, vendors, garden centers, landscapers and landscape gardeners. However, the invasive lily leaf beetle threatens the use of garden lilies in our region. Evidence suggests that the damage caused by this beetle has resulted in many gardeners eliminating lilies from their garden choices.
Native to Europe, LLB was introduced to the eastern U.S. in 1992 and first appeared in southern Maine in 1997 (Folsom 2006, pers. comm.; Livingston et al. 1996). Since then, it has steadily moved northward and is currently the limiting factor in lily growth and production in Maine. Larvae and adult beetles attack all aboveground plant parts, and defoliation reduces plant vigor and flowering, greatly diminishing the aesthetic quality of the plant. In addition, even limited feeding by larvae reduces quality, as all larval stages envelop themselves with a fecal shield for predator protection. Insecticides are registered for LLB control. However, the risks to other invertebrates and to humans associated with these materials, require efforts to investigate alternative LLB management strategies. We feel that host plant resistance may play a significant role in reducing the impact of LLB, as well as reducing pesticide use in commercial and home settings. The goal of this project is to investigate the genetic potential of garden lilies to reduce LLB survival and to deter larval and adult foliage feeding. Objectives: The objective of our proposed project is to investigate the potential for host plant resistance to lily leaf beetle in the northeast region, focusing on promising Oriental cultivars and native lily species. Resistance levels in these plants will be compared with that of a known susceptible variety (cultivar 'Stargazer') and those that have been shown to have some resistance against this pest (L. henryi, L. speciosum 'Uchida', and the hybrid 'Black Beauty', (Livingston et al. 1996, MacGlaflin et al. 2002)). Proposal |
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