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There is growing interest in utilising the cues that small insects use to find their hosts in applied pest management. However, the underlying behaviours involved in small insect host-finding are still not well understood. The primary focus of an ongoing PhD project is to investigate the fundamental host-finding behaviour of small pest insects using thrips as model organisms. It is hypothesised that colours and odours are used by flower-dwelling thrips as cues for detection of, and orientation to, hosts. Two species, Frankliniella occidentalis (western flower thrips (WFT)) and Thrips tabaci (onion thrips (OT)), will be studied in this project. Both are cosmopolitan polyphagous pests of many food and ornamental crops. Yellow, white and blue traps have all been shown to attract WFT and OT, and it has been demonstrated that these thrips respond to the odour methyl isonicotinate. This project links what is known about thrips’ response to colour and odour cues with observed behavioural responses in the field from several novel experimental set-ups. These observations will be used to determine the role of colour and odour cues during host-finding and develop a model of thrips’ host-finding behaviour.

proceedings of the new zealand weed and pest control conference/new zealand plant protection/proceedings of the ... national weeds conference/proceedings of the new zealand weed control conference/proceedings of the new zealand plant protection conference

Exploiting the hostfinding behaviour of thrips with colour and odour attractants underlying principles