Response of adult sandflies, Lutzomyia longipalpis (Diptera: Psychodidae), to sticky traps baited with host odour and tested in the laboratory

The responses of adult Lutzomyia. longipalpis Lutz and Neiva to sticky traps baited with entrained volatiles from a hamster were assessed in the laboratory. In a two-choice test, significantly more females and males were caught on odour-baited sticky traps than on control traps, and only a few adults remained alive and untrapped at the end of the experiments. In contrast, significantly fewer flies of both sexes were caught in a series of tests where both traps were unbaited. Twice as many males as females were caught in the control traps in the tests with odour, an observation in accordance with known male lekking behaviour around hosts. The results show that sandflies of both sexes are attracted to traps by host odour alone, in the absence of any other host cues or pheromones from the male flies.