Energy Biosciences Institute, University of Illinois, Urbana, IL 61801, USA.
J Econ Entomol. 2009 Dec;102(6):2154-9. doi: 10.1603/029.102.0619.
Observations of fall armyworm, Spodoptera frugiperda (J.E. Smith) (Lepidoptera: Noctuidae), larvae infesting plots of Miscanthus x giganteus Greef and Deuter ex Hodkinson and Renvoize prompted laboratory-based tests of survival, development, and feeding preferences on leaf tissue from M. x giganteus and switchgrass, Panicum virgatum L. Survival from hatch to pupation was >70 and 50% for fall armyworms reared on switchgrass and M. x giganteus, respectively, although survival of the S. frugiperda rice strain was significantly greater than the corn strain on both crops. Developmental times from hatch to pupation or adult emergence showed effects of crop and S. frugiperda host strain, but analysis of an interaction revealed developmental times for the rice strain were similar on both crops, whereas corn strain larvae showed delayed development on M. x giganteus relative to switchgrass. Analysis of larval (10 d) and pupal masses showed a similar pattern, with effects of crop and an interaction (at 10 d), but only the mass of corn strain larvae feeding on M. x giganteus was reduced relative to the other crop and strain combinations. In choice tests, neonates of both corn and rice strains showed a strong preference for feeding on young tissues rather than mature leaves of M. x giganteus or switchgrass, but they also clearly favored corn, Zea mays L., leaves over either of the perennial grasses. Results indicate both plants are potential hosts for S. frugiperda, but additional information is needed to understand under which scenarios and to what degree fall armyworms may damage perennial grasses grown for biofuel production.
观察到秋粘虫（Spodoptera frugiperda）（鳞翅目：夜蛾科）幼虫在芒草（Miscanthus x giganteus Greef 和 Deuter ex Hodkinson and Renvoize）种植区出没，促使我们在实验室中对秋粘虫幼虫在芒草和柳枝稷（Panicum virgatum L.）叶片组织上的存活、发育和取食偏好进行了测试。在柳枝稷和芒草上饲养的秋粘虫幼虫，从孵化到化蛹的存活率分别超过 70%和 50%，尽管秋粘虫水稻品系的存活率明显大于玉米品系在这两种作物上的存活率。从孵化到化蛹或成虫出现的发育时间受到作物和秋粘虫宿主品系的影响，但分析表明，水稻品系在两种作物上的发育时间相似，而玉米品系幼虫在芒草上的发育时间相对柳枝稷延迟。对幼虫（10 天）和蛹重的分析也表现出类似的模式，存在作物和相互作用的影响（在 10 天），但只有在芒草上取食的玉米品系幼虫的质量相对于其他作物和菌株组合减少。在选择试验中，玉米和水稻品系的幼虫都强烈倾向于取食芒草或柳枝稷的幼嫩组织，而不是成熟叶片，但它们也明显更倾向于取食玉米叶片。结果表明，这两种植物都是秋粘虫的潜在宿主，但需要更多信息来了解在哪些情况下以及在何种程度下秋粘虫可能会对用于生物燃料生产的多年生草本植物造成损害。
