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Seasonal migration of Cnaphalocrocis medinalis (Lepidoptera: Crambidae) over the Bohai Sea in northern China

Seasonal migration of Cnaphalocrocis medinalis (Lepidoptera: Crambidae) over the Bohai Sea in northern China

Fu, X.- W., Li, C., Feng, H.- Q., Liu, Z. F., Chapman, J. W., Reynolds, D. R. ORCID: 0000-0001-8749-7491 and Wu, K. - M. (2014) Seasonal migration of Cnaphalocrocis medinalis (Lepidoptera: Crambidae) over the Bohai Sea in northern China. Bulletin of Entomological Research, 104 (05). pp. 601-609. ISSN 0007-4853 (Print), 1475-2670 (Online) (doi:

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The rice leaf roller, Cnaphalocrocis medinalis (Guenée), is a serious insect pest of rice with a strong migratory ability. Previous studies on the migration of C. medinalis were mostly carried out in tropical or subtropical regions, however, and what the pattern of seasonal movements this species exhibits in temperate regions (i.e. Northern China, where they cannot overwinter) remains unknown. Here we present data from an 11-year study of this species made by searchlight trapping on Beihuang Island (BH, 38°24′N; 120°55′E) in the centre of the Bohai Strait, which provides direct evidence that C. medinalis regularly migrates across this sea into northeastern agricultural region of China, and to take advantage of the abundant food resources there during the summer season. There was considerable seasonal variation in number of C. medinalis trapped on BH, and the migration period during 2003–2013 ranged from 72 to 122 days. Some females trapped in June and July showed a relatively higher proportion of mated and a degree of ovarian development suggesting that the migration of this species is not completely bound by the ‘oogenesis-flight syndrome’. These findings revealed a new route for C. medinalis movements to and from Northeastern China, which will help us develop more effective management strategies against this pest.

Item Type: Article
Additional Information: [1] Acknowledgements (funding): This research was supported by Special Fund for Agro-scientific Research in the Public Interest of China (grant number 200903051) and the National Natural Science Foundation of China (grant number 31321004). Rothamsted Research is a National Institute of Bioscience strategically funded by the UK Biotechnology and Biological Sciences Research Council (BBSRC).
Uncontrolled Keywords: Cnaphalocrocis medinalis, seasonal migration, searchlight trapping, oversea movements, sexual maturation
Subjects: Q Science > QL Zoology
Faculty / School / Research Centre / Research Group: Faculty of Engineering & Science
Faculty of Engineering & Science > Natural Resources Institute
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Last Modified: 08 Nov 2019 13:12

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