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Flight behaviour in the brown planthopper, Nilaparvata lugens (Stål) (Homoptera: Delphacidae)
Published online by Cambridge University Press: 19 September 2011
Abstract
In order to evaluate the migratory potential of the brown planthopper, Nilaparvata lugens, under as near to normal environmental conditions as possible, adult macropterous insects were captured from the field whilst in the process of flight initiation at the times of their natural take-off peaks. The insects were then flight-mounted and flown in the field. Average flight durations following the dusk take-off were 4 hr 55 min for males and 6 hr 17 min for females. However, many insects flew throughout the night and there was a high frequency of flight cessation at dawn. Following a dawn take-off both sexes flew for much shorter periods, an average of 2 hr 00 min for males and 2 hr 04 min for females. Female insects were reluctant to initiate a second major flight. The role of mating and ovary development in female flight willingness is discussed.
Résumé
Dans le but d'évaluer migrateur du Nilaparvata lugens, et dans des conditions environnantes aussi normales que possible, des insectes macroptères adultes ont été capturés dans le champ en début de vol aux heures où la plupart prennent naturellement leur envol. Les insects furent ensuite préparés pour le vol et lachés dans le champ. Les durées moyennes de vol après l'envol au crépuscule ont été respectivement de 4 hr 55 min pour les mâles et de 6 hr 17 min pour les femelles. Toutefois, de nombreux insects ont volé toute la nuit, et l'on a enregistré une grande frequence de cessation de vol à l'aube. Les deux sexes s'envolant à l'aube ont volé pendant des périodes beaucoup plus courtes, soit une moyenne de 2 hr 00 min pour les mâles et de 2 hr 04 min pour les femelles. Les insects femelles ont semblé peu disposées à entreprendre un second vol important. Le rôle joué per l'accouplement et le développement des ovaires sur la disposition au vol chez les femelles est examiné.
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- Research Articles
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- Copyright © ICIPE 1987
References
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