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ATTRACTION OF DIAMONDBACK MOTHS, PLUTELLA XYLOSTELLA (L.) (LEPIDOPTERA: PLUTELLIDAE), BY VOLATILE COMPOUNDS OF CANOLA, WHITE MUSTARD, AND FABA BEAN1

Published online by Cambridge University Press:  31 May 2012

P. Palaniswamy ,
C. Gillott  and
G.P. Slater
P. Palaniswamy*
Affiliation:
Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
C. Gillott
Affiliation:
Department of Biology, University of Saskatchewan, Saskatoon, Saskatchewan, Canada S7N 0W0
G.P. Slater
Affiliation:
Plant Biotechnology Institute, 110 Gymnasium Road, Saskatoon, Saskatchewan, Canada S7N 0W9
*
2 Author to whom correspondence should be addressed.
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Abstract

The olfactory responses of male and female diamondback moths (Plutella xylostella [L.]) to leaf extracts of the following plants were examined by behavioral and electrophysiological tests: white mustard (Brassica hirta cv. Ochre); Argentine canola (B. napus cv. Regent, B. napus cv. Westar); Polish canola (B. campestris cv. Tobin); and faba bean (Vicia faba). In behavioral tests both two-choice and four-choice situations were used. All extracts attracted more moths than the control except for Regent canola extract which attracted males only. White mustard extract was about twice as attractive as that of Regent or faba bean. White mustard and faba bean extracts appeared slightly more attractive to females than to males. Oviposition was greatly stimulated by white mustard extract, but other extracts had no significant effect. Electroantennogram (EAG) tests showed that both male and female moths perceived the plant extracts through antennal receptors. Antennae of females gave a stronger EAG response than those of males, especially to white mustard and faba bean extracts.

Résumé

On a étudié les réponses olfactives des mâles et femelles de la fausse-teigne des crucifères (Plutella xylostella [L.]) à des extraits du feuillage des plantes suivantes, à l’aide de tests comportementaux et électrophysiologiques : la moutarde rude (Brassica hirta cv. Ochre); des canolas argentins (B. napus cv. Regent, B. napus cv. Westar); un canola polonais (B. campestris cv. Tobin); et la gourgane (Vicia faba). On a fait usage de tests comportementaux à deux et à quatre choix. Tous les extraits se sont avérés plus attractifs que le témoin sauf celui du canola Regent auquel seuls les mâles répondaient. L’extrait de moutarde était environ deux fois plus attractif que celui du canola Regent ou de la gourgane. Les extraits de moutarde et de gourgane semblaient un peu plus attractifs pour les femelles que pour les mâles. La ponte fut stimulée fortement par l’extrait de moutarde, mais les autres extraits n’avaient pas cet effet. Les antennogrammes ont montré que les mâles et les femelles perçoivent les odeurs des extraits par des récepteurs antennaires. Les antennes de femelles répondaient plus que celles des mâles, surtout aux extraits de moutarde et de gourgane.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 12 , December 1986 , pp. 1279 - 1285
Copyright
Copyright © Entomological Society of Canada 1986

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Footnotes

1

Issued as NRCC No. 26106.

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