Terminal velocity of the first instarEctropis excursaria (Guenee) (Lepidoptera: Geometridae)
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Abstract
The terminal velocity of first instarEctropis excursaria, determined in a part mechanical part electrical apparatus, were 114±12 cm/s and 118±12·5 cm/s for two different heights. Terminal velocity decreased exponentially with increased silk lengths. For a given length of silk there wsa a significant difference in the terminal velocity of live and anaesthetised insects. The significance of these results to the understanding of the wind dispersal of first instar caterpillars is discussed.
Keywords
Terminal velocity Ectropis excursaria first instars wind dispersal silk length anaesthetisationPreview
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© Indian Academy of Sciences 1987