caa a22 4500 388036168 CHVBK 20180307125005.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1017/S000748530002575X doi S000748530002575X pii (NATIONALLICENCE)cambridge-10.1017/S000748530002575X Weather associated with autumn and winter migrations of rice pests and other insects in south-eastern and eastern Asia [Elektronische Daten] Trajectory analysis was used to determine the direction and extent of windborne migrations of insects trapped in autumn and winter in south-east and east Asia for 12 years between 1968 and 1987. Nearly 2600 trajectories were drawn upwind at 10 m and 1.5 km from 15 catching sites and within the time (⋜60 h), wind speed (⋝5 km h-1) and temperature (⋝10°C) thresholds used, only 5% of the trajectories failed to locate a possible source and over 90% were completed in 40 h or less. The delphacids Nilaparvata lugens Stål and Sogatella furcifera (Horváth) dominated the trap catches (96%) with Cicadellidae (2.3%) and Diptera (0.5%) as the next most numerous. Very few Lepidoptera were reported (<0.3%). Nearly 80% of the trajectories were constructed in the prevailing Winter Monsoon and Trade winds, resulting in a southward displacement of insects towards putative overwintering areas as reported in previous studies. Tropical cyclones in autumn, produced trajectories which differed in both direction and extent from those in the prevailing winds, supporting the suggestion that the contraction of the distribution areas of rice pests at this time of year is the product of a series of movements in different directions. The results suggest that migrations continue throughout the year in the tropics and sub-tropics and indicate that this may be one way the capacity for long distance migration is maintained in some rice pest populations. Copyright © Cambridge University Press 1998 Rutter J.F. Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK Mills A.P. Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK Rosenberg L.J. Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK Bulletin of Entomological Research Cambridge University Press 88/2(1998-04), 189-197 0007-4853 88:2<189 1998 88 BER https://doi.org/10.1017/S000748530002575X text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S000748530002575X text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Rutter J.F. Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK NATIONALLICENCE 700 1- Mills A.P. Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK NATIONALLICENCE 700 1- Rosenberg L.J. Natural Resources Institute, University of Greenwich, Central Avenue, Chatham Maritime, Kent, ME4 4TB, UK NATIONALLICENCE 773 0- Bulletin of Entomological Research Cambridge University Press 88/2(1998-04), 189-197 0007-4853 88:2<189 1998 88 BER CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge