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Université de Fribourg

A simple in vitro method to study interactions between soil insects, entomopathogenic fungi, and plant extracts

Eckard, Sonja ; Bacher, Sven ; Enkerli, Jürg ; Grabenweger, Giselher

In: Entomologia Experimentalis et Applicata, 2017, vol. 163, no. 3, p. 315–327

A combined application of a biological control agent, such as an entomopathogenic fungus (EPF), with other means of pest control may lead to enhanced or more reliable efficacy of the biocontrol agent. Ideally, the combined components would interact synergistically, yielding significantly higher mortality of the target pest. The mode of such interactions is often unclear and particularly...

Université de Neuchâtel

Olfactory and behavioural responses of the blood-sucking bug Triatoma infestans to odours of vertebrate hosts

Guerenstein, Pablo G. ; Guerin, Patrick M.

In: The Journal of Experimental Biology, 2001, vol. 204, no. 3, p. 585-597

Olfactory receptors in basiconic and grooved-peg sensilla on the antenna of fifth-instar Triatoma infestans nymphs respond to host odours. Gas chromatography analyses of host odour extracts coupled to electrophysiological recordings from basiconic sensillum receptors indicate that nonanal is a constituent of sheep wool and chicken feather odour that stimulates one of the receptors in this...

Université de Neuchâtel

Ixodid ticks avoid contact with liquid water

Kröber, Thomas ; Guerin, Patrick M.

In: The Journal of Experimental Biology, 1999, vol. 202, no. 14, p. 1887-1883

Larvae of the cattle tick Boophilus microplus and all life stages of the European sheep tick Ixodes ricinus avoid walking on a wet membrane surface surrounding a dry patch. Of 170 reactions made at a border with liquid water by 22 B. microplus larvae, 40% consisted of immediate turns to the opposite side to bring all the legs back onto a dry patch, 41% were walks along the border, during which...

Université de Neuchâtel

Tsetse fly responses to volatile plant compounds

Joris, Caroline ; Guerin, Patrick (Dir.)

Thèse de doctorat : Université de Neuchâtel, 2012.

Les glossines (Diptera, Glossinidae) constituent 31 espèces et sous-espèces réparties en trois sous-genres. Elles sont actuellement limitées à l’Afrique sub-saharienne et préfèrent trois habitats: la savane, les zones riveraines et la forêt. Les deux sexes sont strictement hématophages et peuvent transmettre la trypanosomiase au cours de leur repas de sang qui provoque la maladie du...