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Med Vet Entomol


Title:Behavioural responses of Phlebotomus duboscqi to plant-derived volatile organic compounds
Author(s):Hassaballa IB; Matoke-Muhia D; Masiga DK; Sole CL; Torto B; Tchouassi DP;
Address:"International Centre of Insect Physiology and Ecology, Nairobi, Kenya. Department of Zoology and Entomology, University of Pretoria, Pretoria, South Africa. Centre for Biotechnology Research and Development, Kenya Medical Research Institute, Nairobi, Kenya"
Journal Title:Med Vet Entomol
Year:2021
Volume:20210726
Issue:4
Page Number:625 - 632
DOI: 10.1111/mve.12541
ISSN/ISBN:1365-2915 (Electronic) 0269-283X (Linking)
Abstract:"Phlebotomine sand flies are vectors of Leishmania parasites that cause leishmaniases. Both sexes of sand flies feed on plants primarily for sugars, although the chemical cues that mediate attraction to host plants remain largely unknown. Previously, using coupled gas chromatography-mass spectrometry, the authors identified several volatile organic compounds (VOCs) common to preferred host plants for selected Afrotropical sand flies from the Fabaceae family. Of the identified volatiles, the significance of the monoterpenes linalool oxide, ocimene and p-cymene and the benzenoid m-cresol, p-cresol in sand fly behaviour is unknown. In olfactometer assays, the authors tested these compounds singly and in blends for their attractiveness to Phlebotomus duboscqi, cutaneous leishmaniasis vector in Kenya. In dose-response assays, single compounds increased the responses of males and females over controls, but their optimum attractive doses varied between the sexes. Two five-component blends, referred to as Blend-f and Blend-m for females and males respectively, were formulated and tested in dose-response assays against 1-octen-3-ol (positive control). The results of the present study showed that males and females were significantly attracted to varying levels of the two blends. In pairwise assays, the authors evaluated the most attractive of these blends to each sex (i.e., Blend Am for male against Blend Bf for female), revealing that males were attracted to both blends at varying levels, whereas females were indifferent. The study's results demonstrate that plant-derived VOCs can be exploited for sand fly management"
Keywords:"Animals Female Kenya *Leishmaniasis, Cutaneous/veterinary Male *Phlebotomus/parasitology *Psychodidae/physiology *Volatile Organic Compounds Fabaceae Kairomones Leishmania Phlebotomus duboscqi Sand fly;"
Notes:"MedlineHassaballa, I B Matoke-Muhia, D Masiga, D K Sole, C L Torto, B Tchouassi, D P eng Research Support, Non-U.S. Gov't England 2021/07/27 Med Vet Entomol. 2021 Dec; 35(4):625-632. doi: 10.1111/mve.12541. Epub 2021 Jul 26"

 
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