Entomologia Experimentalis et Applicata (2007) 123, 253-262

David A.J. Teulon, Ruth C. Butler, Dale E. James and Melanie M. Davidson (2007)
Odour-baited traps influence thrips capture in proximal unbaited traps in the field
Entomologia Experimentalis et Applicata 123 (3), 253-262
Abstract: Two field experiments examined the distance over which an attractant odour of a volatile chemical could influence thrips capture in proximal traps that were without the odour. In each experiment a star-shaped array of water traps consisted of a centre trap with or without an odour surrounded by odourless traps at 0.5, 1, 2, 5, and 10 m in eight equally spaced radial arms 45° apart. Experiments ran for 47 h (centre trap: ethyl nicotinate) or 7 h (centre trap: ethyl isonicotinate). Each had four replicates. With ethyl nicotinate, more thrips were trapped in the centre-baited traps than in the unbaited centre traps (63×, 7×, 98× and 200× for total thrips, Thrips tabaci Lindeman female, and Thrips obscuratus Crawford female and male, respectively) (Thysanoptera: Thripidae). More total thrips and T. tabaci female were trapped in the centre traps baited with ethyl isonicotinate than in unbaited centre traps (21× for both). For ethyl nicotinate, numbers of T. obscuratus in unbaited traps downwind from the baited centre trap declined by 50% within 0.4 m (female) and 2 m (male) and by 95% within 3 m (both female and male) based on model predictions. For ethyl isonicotinate, numbers of T. tabaci in unbaited traps downwind from the baited centre trap declined by 50% within 1.3 m and by 95% within 10 m based on model predictions. Wind direction was an important factor in the degree and direction of thrips capture with the highest thrips capture downwind from the centre trap with odour. There was no increase in numbers of T. tabaci in any traps without odour in the ethyl nicotinate-centred array. Differences in trapping patterns between thrips species and odours indicated that there were thrips species-odour specific interactions. Experiments examining differences between traps with and without a thrips attractant odour need to be designed very carefully to ensure meaningful results especially in enclosed and/or low-wind indoor situations.
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Link to article at publishers website
Database assignments for author(s): David A.J. Teulon, Melanie M. Davidson

Research topic(s) for pests/diseases/weeds:
pheromones/attractants/traps

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Thrips tabaci
	Thrips obscuratus