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Anemotactic strategy and optimum flight conditions for host-plant finding in the cabbage root fly, Delia radicum (L.) (Diptera: Anthomyiidae)

Published online by Cambridge University Press:  10 July 2009

S. F. Nottingham
S. F. Nottingham
Affiliation:
Department of Applied Biology, University of Cambridge, Pembroke Street, Cambridge, CB2 3DX, UK
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Abstract

Hourly trap catches of Delia radicum (L.) from opposite sides of host-plant (cabbage) and non-host-plant (carrot) plots in eastern England were analysed with respect to local wind direction, wind speed, temperature and humidity. More females were caught around host- than non-host-plant plots. They predominantly approached host-plant plots by upwind movement, but equal upwind and downwind movement occurred to non-host-plant plots. A generalized linear model revealed that wind speed and humidity influenced the total trap catch of females, with wind speeds below 2 m/s and relative humidities above 65% being most favourable to fly activity, while wind speed was the only variable having a significant effect on the trap catches of flies moving upwind to host-plant plots.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 77 , Issue 2 , June 1987 , pp. 271 - 277
Copyright
Copyright © Cambridge University Press 1987

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