Potential novel hosts for the lily leaf beetle Lilioceris lilii Scopoli (Coleoptera: Chrysomelidae) in eastern North America
Potential novel hosts for the lily leaf beetle Lilioceris lilii Scopoli (Coleoptera: Chrysomelidae) in eastern North America
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DOI：
10.1111/j.1365-2311.2006.00834.x
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发表时间：
2007-02-01
影响因子：
2.2
通讯作者：
Arnason, John Thor
中科院分区：
文献类型：
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作者：
Ernst, Crystal;Cappuccino, Naomi;Arnason, John Thor
1.引入的昆虫通常将本地植物纳入其饮食，并可能表现出对与其正常宿主有亲缘关系的新宿主的偏好。百合叶甲（Lilioceris lilii）是百合科（Coleoptera）叶甲科（Eschomelidae）的一种外来害虫。产卵行为、幼虫行为和发育。在一系列潜在的寄主植物，以及正常的主机，亚洲杂交百合百合百合sp.2。新生幼虫的摄食行为进行了量化的15种食用植物：10从百合目，三个从天门冬目和两个真双子叶植物。与百合属亲缘关系较近的被取食植物更容易主动取食，放弃食叶的可能性较小，取食叶面积也较大.在无选择试验中，雌虫在新寄主上产卵，但在新寄主上产卵的雌虫中，除美洲百合外，其余均在新寄主上产卵。Philadelphicum收到的卵很少。选择试验中，非百合新寄主与亚洲百合一起沿着时，不用于产卵.一个单独的个体在新宿主S上被饲养到成年阶段。抱叶植物有几只幼虫在M.弗吉尼亚，虽然没有成年人出现在这些pupelies。以野生木莲L.与亚洲品种相比，费城花表现同样好或更好。研究结果表明，百合叶甲对百合科植物构成威胁。几种当地百合属植物，包括L. philadelphicum，在某些管辖范围内受到威胁或濒危;这些物种应密切监测甲虫的殖民化。
1. Introduced insects often incorporate native plants into their diets and might be expected to show a predilection for novel hosts that are phylogenetically related to their normal hosts. The lily leaf beetle, Lilioceris lilii (Coleoptera: Chrysomelidae), is an introduced pest of cultivated lilies. Oviposition behaviour, larval behaviour, and development of L. lilii was examined on a range of potential host plants, as well as on the normal host, Asiatic hybrid lilies Lilium sp.2. Neonate larval feeding behaviour was quantified on 15 food plant species: 10 from the Liliales, three from the Asparagales and two eudicots. Larvae fed plants closely related to the genus Lilium were more likely to initiate feeding, less likely to abandon their food leaf, and consumed more leaf area.3. In no-choice tests, females oviposited on the novel hosts Lilium philadelphicum, Medeola virginiana, Clintonia borealis, Streptopus amplexifolius, and Polygonatum biflorum; however, all but L. philadelphicum received very few eggs. Non-Lilium novel hosts were not used for oviposition when presented along with Asiatic lilies in choice tests.4. A single individual was reared to the adult stage on the novel host S. amplexifolius. Several larvae survived to the pupal stage on M. virginiana, although no adults emerged from those pupae. Larvae reared on the native wood lily L. philadelphicum performed equally well or better than on the Asiatic cultivar.5. Our results indicate that the lily leaf beetle poses a threat to native Liliaceae. Several native Lilium species, including L. philadelphicum, are threatened or endangered in certain jurisdictions throughout their range; these species should be monitored closely for colonisation by the beetle.