Present addresses: Hong-Ye Zhu, Science and Technological Division, Yunnan Academy of Agricultural Sciences, Kunming, Yunnan, China. ‡ Ying-Cui Zhang, Research Institute for Tobacco Agricultural Sciences, Chuxiong, Yunnan, China.
A novel host shift and invaded range of a seed predator, Acanthoscelides macrophthalmus (Coleoptera: Chrysomelidae: Bruchinae), of an invasive weed, Leucaena leucocephala
Article first published online: 25 MAR 2009
© 2009 The Entomological Society of Japan
Volume 12, Issue 1, pages 1–8, March 2009
How to Cite
TUDA, M., WU, L.-H., TATEISHI, Y., NIYOMDHAM, C., BURANAPANICHPAN, S., MORIMOTO, K., WU, W.-J., WANG, C.-P., CHEN, Z.-Q., ZHU, H.-Y., ZHANG, Y.-C., MURUGAN, K., CHOU, L.-Y. and JOHNSON, C. D. (2009), A novel host shift and invaded range of a seed predator, Acanthoscelides macrophthalmus (Coleoptera: Chrysomelidae: Bruchinae), of an invasive weed, Leucaena leucocephala. Entomological Science, 12: 1–8. doi: 10.1111/j.1479-8298.2009.00297.x
- Issue published online: 25 MAR 2009
- Article first published online: 25 MAR 2009
- Received 24 June 2008; accepted 5 September 2008.
- host specificity;
- pre-dispersal and post-dispersal seed predator;
- weed control
An endophagous seed predator, Acanthoscelides macrophthalmus (Coleoptera: Chrysomelidae: Bruchinae), utilizes Neotropical Leucaena (Fabaceae: Mimosoideae). One of its hosts, Leucaena leucocephala, is a fast-growing nitrogen-fixing tree that serves as a multipurpose beneficial plant but eventually becomes an aggressive invader where it was introduced. Herein, we report A. macrophthalmus invasion of the Far East, South Asian tropics and subtropics (Japanese Pacific Islands, Taiwan, Southern China, Northern Thailand and Southern India). Of other field-collected mimosoid legumes, an introduced tree, Falcataria moluccana, in Taiwan was found to be used by the seed predator. Conversely, our published work review revealed that the seed predator had retained high host specificity to Leucaena species in its native and introduced regions. Acanthoscelides macrophthalmus was able to utilize aphagously postharvest mature seeds for oviposition and larval development, which is a trait of post-dispersal seed predators. We confirmed that A. macrophthalmus that was reared on L. leucocephala was able to utilize F. moluccana as well. Although the relatively high host specificity of the oligophagous beetle is suitable for controlling the weedy L. leucocephala, the potential host range expansion confirmed by this study must be cautioned.