Seasonal abundance of macropterous Nilaparvata lugens and Sogatella furcifera based on presumptive macroptery in fifth-instar nymphs
Article first published online: 14 MAR 2008
Volume 10, Issue 3, pages 249–258, August 1985
How to Cite
COOK, A. G. and PERFECT, T. J. (1985), Seasonal abundance of macropterous Nilaparvata lugens and Sogatella furcifera based on presumptive macroptery in fifth-instar nymphs. Ecological Entomology, 10: 249–258. doi: 10.1111/j.1365-2311.1985.tb00721.x
- Issue published online: 14 MAR 2008
- Article first published online: 14 MAR 2008
- Accepted 21 January 1985
- N. lugens;
- S. furcifera;
Abstract. 1. The seasonal changes in abundance of macropterous N. lugens (Stal) and S. furcifera (Horvath) (Homoptera: Delphacidae) are described based on observed numbers of adults and presumptive macroptery in fifth-instar nymphs occurring in rice crops in the Philippines.
2. Percentage presumptive macroptery in fifth-instar nymphs was correlated with nymphal density over the range of 0–20 nymphs per hill for females of both species and 5–20 nymphs per hill for male N. lugens.
3. Lunar phase had no effect on wingmorph expression in either species.
4. Comparison of the percentage macroptery in fifth-instar nymphs with subsequent percentage macroptery in N. lugens adults for one season showed net emigration occurred from 60 DAT (days after transplanting) to harvest except for a period of net immigration lasting 7–10 days at approximately 95 DAT for both sexes.