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Trapping female cabbage root flies (Delia radicum (L.)) (Diptera: Anthomyiidae) with allylisothiocyanate-Baited traps

Published online by Cambridge University Press:  10 July 2009

S. Finch  and
G. Skinner
S. Finch
Affiliation:
National Vegetable Research Station, Wellesbourne, Warwick, CV35 9EF, UK
G. Skinner
Affiliation:
National Vegetable Research Station, Wellesbourne, Warwick, CV35 9EF, UK
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Abstract

Field experiments in England with traps baited with allylisothiocyanate (ANCS) showed that females of Delia radicum (L.) were distributed more or less evenly through established brassica crops. Reducing the quantity of ANCS released from the traps either by diluting the concentrate with liquid paraffin or by presenting the concentrate in Wädenswil dispensers reduced the numbers of females caught. There was no indication that ANCS became repellent, even when released at a rate of 24 ml/trap per day. For maximum effectiveness, the ANCS dispenser had to be placed at the centre rather than at the edge of the trap. Attempts to make traps more effective by releasing the ANCS from several point sources around a trap, in the hope that this broader odour plume would ‘ attract ’ more flies, were unsuccessful. The ANCS-baited trap had an effective zone only 5 m in radius.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 72 , Issue 1 , March 1982 , pp. 165 - 173
Copyright
Copyright © Cambridge University Press 1982

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