Université de Neuchâtel

Three-dimensional flight tracking shows how a visual target alters tsetse fly responses to human breath in a wind tunnel

Gurba, Alexandre ; Harraca, Vincent ; Perret, Jean-Luc ; Casera, Steve ; Donnet, Stéphane ; Guerin, Patrick M

In: Physiological Entomology, 2012, vol. 37, no. 3, p. 250-257

Tsetse flies Glossina spp. (Diptera; Glossinidae) are blood-feeding vectors of disease that are attracted to vertebrate hosts by odours and visual cues. Studies on how tsetse flies approach visual devices are of fundamental interest because they can help in the development of more efficient control tools. The responses of a forest tsetse fly species Glossina brevipalpis (Newstead)...

Université de Neuchâtel

Standardising Visual Control Devices for Tsetse Flies : Central and West African Species Glossina palpalis palpalis

Kaba, Dramane ; Zacarie, Tusevo ; M'Pondi, Alexis Makumyaviri ; Njiokou, Flobert ; Bosson-Vanga, Henriette ; Kröber, Thomas ; McMullin, Andrew ; Mihok, Steve ; Guerin, Patrick M

In: PLoS Neglected Tropical Diseases, 2014, vol. 8, no. 1, p. e2601

Background: Glossina palpalis palpalis (G. p. palpalis) is one of the principal vectors of sleeping sickness and nagana in Africa with a geographical range stretching from Liberia in West Africa to Angola in Central Africa. It inhabits tropical rain forest but has also adapted to urban settlements. We set out to standardize a long-lasting, practical and cost-effective visually attractive...

Université de Neuchâtel

Plant Volatiles Enhance Behavioral Responses of Grapevine Moth Males, Lobesia botrana to Sex Pheromone

Von Arx, Martin ; Schmidt-Büsser, Daniela ; Guerin, Patrick M

In: Journal of Chemical Ecology, 2012, vol. 28, no. 2, p. 222-225

Plant volatiles play an important role in the lives of phytophagous insects, by guiding them to oviposition, feeding and mating sites. We tested the effects of different host-plant volatiles on attraction of Lobesia botrana males to the female-produced sex pheromone, in a wind tunnel. Addition of volatile emissions from grapevines or individual plant volatiles to pheromone increased the...

Université de Neuchâtel

Water vapour and heat combine to elicit biting and biting persistence in tsetse

Chappuis, Charles JF ; Béguin, Steve ; Vlimant, Michèle ; Guerin, Patrick M

In: Parasites and Vectors, 2013, vol. 6, no. 240, p. 1-11

Tsetse flies are obligatory blood feeders, accessing capillaries by piercing the skin of their hosts with the haustellum to suck blood. However, this behaviour presents a considerable risk as landing flies are exposed to predators as well as the host’s own defense reactions such as tail flicking. Achieving a successful blood meal within the shortest time span is therefore at a premium in...

Université de Neuchâtel

Small Cages with Insect Couples Provide a Simple Method for a Preliminary Assessment of Mating Disruption

Briand, Françoise ; Guerin, Patrick M ; Charmillot, Pierre-Joseph ; Kehrli, Patrik

In: ScientificWorld Journal, 2012, vol. 2012, no. ID 960468, p. 1- 8

Mating disruption by sex pheromones is a sustainable, effective and widely used pest management scheme. A drawback of this technique is its challenging assessment of effectiveness in the field (e.g., spatial scale, pest density). The aim of this work was to facilitate the evaluation of field-deployed pheromone dispensers. We tested the suitability of small insect field cages for a pre-evaluation...