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Field response of onion thrips and New Zealand flower thrips to single and binary blends of thrips lures

Published online by Cambridge University Press:  02 April 2012

Michael J. Wogin*
Affiliation:
Department of Biological Sciences, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia, Canada V5A 1S6, and New Zealand Institute for Plant and Food Research Ltd., Private Bag 4704, Christchurch, New Zealand
Ruth C. Butler
Affiliation:
New Zealand Institute for Plant and Food Research Ltd., Private Bag 4704, Christchurch, New Zealand
David A.J. Teulon
Affiliation:
New Zealand Institute for Plant and Food Research Ltd., Private Bag 4704, Christchurch, New Zealand
Melanie M. Davidson
Affiliation:
New Zealand Institute for Plant and Food Research Ltd., Private Bag 4704, Christchurch, New Zealand
*
1Corresponding author (e-mail: [email protected]).

Abstract

Tests were performed to determine whether combining two thrips lures, ethyl nicotinate (EN) and ethyl isonicotinate (EI), in the same water trap increased the numbers of New Zealand flower thrips (NZFT), Thrips obscuratus Crawford, and onion thrips, T. tabaci Lindeman (Thysanoptera: Terebrantia: Thripidae), caught in the field relative to traps with a single lure. Traps with both lures (1:1 ratio; mixture or separate adjacent vials) caught 5–9 times more female onion thrips (thelyotokous populations are the most prevalent in New Zealand) than traps with EN only (P<0.001), but in similar numbers to traps with EI only. Traps with both lures caught 2–3 times as many male and female NZFT than traps with EI only, but in similar numbers to traps with EN only. Thus, a combination of the two lures in one trap could be used to detect and monitor flying onion thrips and NZFT simultaneously.

Résumé

Nous avons testé si le fait de combiner deux leurres connus à thrips, l'éthyl nicotinate (EN) et l'éthyl isonicotinate (EI), dans le même piège à eau, augmentait la quantité de Thrips obscuratus Crawford (New Zealand flower thrips, NZFT) et de T. tabaci Lindeman (thrips à oignon) (Thysanoptera: Terebrantia : Thripidae) attrapés au champ en comparaison avec des pièges à leurre unique. Les pièges avec les deux leurres (1:1 ratio) ont attrapé 5–9 fois plus de thrips à oignon femelles que les pièges avec EN uniquement (P<0.001), mais en quantités similaires aux pièges avec EI uniquement. Les pièges avec les deux leurres ont attrapé 2–3 fois plus de mâles et de femelles NZFT que les pièges avec EI uniquement, mais des quantités similaires aux pièges avec EN uniquement. Ainsi, la combinaison des leurres dans un même piège pourrait être utilisée pour détecter et faire un suivi à la fois des thrips aériens à oignon et de ceux à NZFT.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 2010

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