1Present address: Specialty Chemicals Research Centre, Shin-Etsu Chemical Co., Ltd, 28-1 Nishifukushima, Kubiki-ku, Joetsu, Niigata 942-8601, Japan.
Influence of host plant odours on invasion of the rice leaf bug Trigonotylus caelestialium into paddy fields
Article first published online: 3 NOV 2009
© 2009 The Authors. Journal compilation © 2009 The Royal Entomological Society
Agricultural and Forest Entomology
Volume 12, Issue 1, pages 99–105, February 2010
How to Cite
Fujii, T., Hori, M. and Matsuda, K. (2010), Influence of host plant odours on invasion of the rice leaf bug Trigonotylus caelestialium into paddy fields. Agricultural and Forest Entomology, 12: 99–105. doi: 10.1111/j.1461-9563.2009.00457.x
- Issue published online: 11 JAN 2010
- Article first published online: 3 NOV 2009
- Accepted 1 June 2009First published online 3 November 2009
- graminaceous weed;
- Oryza sativa;
- rice leaf bug;
- Trigonotylus caelestialium
- 1The host-odour preferences of the rice leaf bug Trigonotylus caelestialium between the rice plant Oryza sativa L. and four species of graminaceous weeds, Poa annua, Alopecurus aequalis, Digitaria ciliaris and Eleusine indica, were investigated with an olfactometer aiming to clarify the influence of these odours on invasion of the bug to paddy fields at the flowering stage of rice.
- 2Both female and male adults significantly preferred the graminaceous weed A. aequalis in the flowering stage to rice in the fifth-leaf stage. The bugs also significantly preferred flowering P. annua and A. aequalis to rice in the panicle-formation stage. However, the bugs showed no preferences between rice in the flowering and grain-filling stages and the flowering graminaceous weeds P. annua, D. ciliaris and E. indica.
- 3The preference of the rice leaf bug for the flowering graminaceous weeds before rice flowering coincides with the fact that these bugs mainly live on these weeds before rice flowering. It is considered that the bug's similar preference for flowering rice panicles as the flowering graminaceous weeds causes the intense invasion of the bug into paddy fields at this rice developmental stage.