Deletre E. auteur aut IRD Chandre Fabrice auteur aut IRD Barkman B. auteur aut IRD Menut C. auteur aut IRD Martin T. auteur aut IRD text journalArticle eng text/pdf born digital access BACKGROUNDIn tropical countries, netting is an effective sustainable tool for protecting horticultural crops against Lepidoptera, although not against small pests such as Bemisia tabaci, while smaller mesh netting can be used in temperate regions. A solution is to combine a net with a repellent. Previously we identified repellent essential oils: lemongrass (Cymbopogon citratus), cinnamon (Cinnamomum zeylanicum), cumin (Cuminum cyminum) and citronella (Cymbopogon winternarius). The present study was designed to identify the active compounds of these essential oils, characterise their biological activity and examine their potential for coating nets. We investigated the efficiency and toxicity of nets dipped in different solutions. We then studied the repellent effect with an olfactometer and the irritant effect by videotracking. RESULTSGeraniol and citronellol were the most promising net coatings owing to their repellent effect. The repellency, irritancy or toxicity varied with the product and concentration, and these features were independent, indicating that the repellent and the irritant/toxic mechanisms were not the same. The combined effects of these different compounds account for the bioactivity of the mixture, suggesting interactions between the compounds. CONCLUSIONThis new sustainable strategy for protecting vegetable crops against whiteflies is discussed, in addition to the use of companion plants that could produce such bioactive compounds. specialized behaviour repellence irritation toxicity DEET permethrin 052 076 72 1 179-189 2016 1526-498X https://www.documentation.ird.fr/hor/fdi:010066168 10.1002/ps.3987 1526-498X [F B010066168] https://www.documentation.ird.fr/hor/fdi:010066168 https://www.documentation.ird.fr/intranet/publi/2016/02/010066168.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2016-02-26 2017-08-23 fdi:010066168 fre