Emilie Deletre

Contact Details 

Emilie Deletre - PhD


Chemical ecology of insect-plant interactions


 TA B-103 / C

Campus international de Baillarguet 

34398 Montpellier Cedex 5 France

+254 718 646 982 - Secr. : +33 4 67 59 39 30


Visiting scientist at the plant health department of  ICIPE, Nairobi, Kenya

P.O. Box 30772-00100 Nairobi, Kenya 




Main Research Interests

My task within the HortSys unit, as an entomologist specialized in chemical ecology of plant-insect interaction, is to search out innovative and sustainable pest management strategies for vegetables. These new production systems will be developed using the semiochemicals involved in plant-insect interactions. The aim is to understand and to promote the biological regulations according to the agro-ecology concepts to reduce pesticide use and to increase vegetable quality. 





PhD in ecosystems and agronomical sciences at Montpellier University. Research in chemical ecology on repellence in insects & applications for IPM.


MSc in Agronomy & Crop protection at AgroCampus-Ouest (French University level school of engineering), Rennes, France

5/09/2005-31/07/2008 :

Preparation for competitive entry exam for the French University level school of agronomical engineering, at Lakanal School, Sceaux, France



1/09/2016- :

Visiting scientist at the plant health department of  ICIPE, Nairobi, Kenya

1/03/2015- :


Researcher in agroecological functioning and performances of horticultural systems, CIRAD, Montpellier, France




B Mekonnen, J Haran, R Copeland, C Pirk, A Yusuf, E Deletre, First report of a gall midge as a parasitoid of weaver ants, (accepted, Entomologia Generalis)



A Antwi-Agyakwa, A Fombong, E Deletre, A. Yusuf, C Pirk, B TortoLemon terpenes elicit arrestment behavior in the African citrus triozid Trioza erytreae (Hemiptera: Triozidae). 2019. Journal of chemical ecology 45.11 (2019): 934-945.

T Nordey, N Mlowe, T Martin, E Deletre. Small mesh nets protect tomatoes from insect pests and increase yields in eastern Africa.2019.  Journal of Horticultural Science & Biotechnology: 1-7.

S. Diabate, T Martin, LK Murungi, KK Fiaboe, S Subramanian, J Wesonga, E  Deletre. Repellent activity of Cymbopogon citratus and Tagetes minuta and their specific volatiles against Megalurothrips sjostedti. 2019. Journal of Applied Entomology.

S Diabate, E Deletre, LK Murungi, KK Fiaboe, S Subramanian, J Wesonga, T Martin. Behavioural responses of bean flower thrips (Megalurothrips sjostedti) to vegetative and floral volatiles from different cowpea cultivars. 2019. Chemoecology29(2) :73-88.

S Diabate, E Deletre, L Kananu Murungi, K Fiaboe, J Wesonga T Martin. Behavioural response of alate Aphis craccivora Koch (Homoptera: Aphididae) to volatiles from different cowpea cultivars. 2019. Journal of Applied Entomology.

A Chailleux, A Stirnemann, J Leyes, E Deletre. Manipulating natural enemy behavior to improve biological control: attract and repulse 2019. Entomologia Generalis 38(3):191-210

E Deletre, F Chandre, C Duménil, T Martin. Insecticide resistance modifies mosquito behavior to DEET and natural repellents 2019. Parasites & vectors. 12(1):89.

M Kungu, E Deletre, S Subramanian, K Fiaboe, T. Martin. A new mite IPM strategy: predator avoidance behaviour resulting from the synergetic effects of predator release and acaricide-treated nets. 2019. Pest management science. 75(4) :979-985



G Azandémè Hounmalona, N Maniania, N Saliou, S Fellous, S Kreiter, E Deletre, K Fiaboe, T Martin Performance of Metarhizium anisopliae-treated foam in combination with Phytoseiulus longipes Evans on Tetranychus evansi Baker & Pritchard (Acari: Tetranychidae). 2018. Pest management science. 74(12):2835-2841.



T Nordey, C Basset-Mens; H De Bon; T Martin; E Deletre; S Simon; L Parrot; H Despretz; Y Biard; J Huat; T Dubois; E Malezieux. Protected cultivation of vegetable crops in sub-Saharan Africa: limits and prospects for smallholders. A review. 2017. Agronomy for Sustainable Development. 37(6):53.



Martin T., M. Saidi, S. Niassy, S. Simon, F. Vidogbena, L. Parrot, S. Ekesi, E. Deletre, S. Subramanian, F. Assogba-Komlan, V. Baird, K. Fiaboe, M. Ngouajio, J.E. Simon, A. Ratnadass. Insect net: A Novel Technology to Promote Integrated Pest Management on Horticultural Crops in Africa. 2016. III All Africa Horticultural Congress. 1225 :43-52.

E Deletre, B Schatz, L Williams, D Bourguet, A Ratnadass, F Chandre, T Martin. Prospects for repellency in pest control – current developments and future challenges. 2016. Chemoecology. 26(4):127-142

E Deletre, F Chandre, L Williams, C Duménil, C Menut, T Martin, Electrophysiological and behavioral characterization of bioactive compounds of four essential oils on Anopheles gambiae and prospects for use in treated bed nets. 2016. Parasites & Vectors. 14(1):1-5

E Deletre, F Chandre, B Barkman, C Menut, T Martin. Naturally occurring bioactive compounds from four repellent essential oils against the whitefly Bemisia tabaci. 2016 Pest Manag Sci. 72(1), 179-189.



E Deletre, M Mallent, F Chandre, C Menut, T Martin.Behavioral response of Bemisia tabaci to 20 plant extracts, 2015. J. Econ. Entom. Tov118



T Martin, A Kamal, E Gogo, M Saidi, E Deletre, R Bonafos, S Simon, M Ngouajio. Repellent effect of alphacypermethrin-treated netting against Bemisia tabaci (Hemiptera: Aleyrodidae). 2014. J. Econ. Entom. 107(2):684-90.

E. Deletre, R. Bonafos, T. Martin. Evaluation of acaricide-treated string curtains for control of two-spotted spider mite Tetranychus urticae Koch (Acari: Tetranychidae) on greenhouse roses and impact of the string curtain on the predatory mite Phytoseiulus persimilis Athias-Henriot (Acari: Phytoseiidae). 2014. Crop Protection, 60:34–43.



E Deletre, T Martin, P Campagne, D Bourguet, A Cadin, C Menut, R Bonafos, F Chandre. Repellent, Irritant and Toxic Effects of 20 Plant Extracts on Adults of the Malaria Vector Anopheles gambiae Mosquito. 2013 PLoS ONE, 8(12):e82103.

T Martin, R Palix, A Kamal, E Deletre, R Bonafos, S Simon, M Ngouajio. A repellent net as a new technology to protect cabbage crops. 2013. J. Econ. Entom. 106(4):1699-706.

F Baldacchino, C Tramut, A Salem, E Liénard, E Deletre, M Franc, T Martin, G  Duvallet, P Jay-Robert. The repellency of lemongrass oil against stable flies, tested using video tracking. 2013. Parasite, 20:21.



Martin T.Parrot L.Belmin R.Nordey T.Basset-Mens C.Biard Y.Deletre E.Simon S.Le Bellec F.. 2019. Anti-insect nets to facilitate the agroecological transition in Africa. In : The agroecological transition of agricultural systems in the Global South. Côte François-Xavier (ed.), Poirier-Magona Emmanuelle (ed.), Perret Sylvain (ed.), Roudier Philippe (ed.), Bruno Rapidel (ed.), Thirion Marie-Cécile (ed.). Versailles : Ed Quae, pp. 75-87. (Agricultures et défis du monde) ISBN 978-2-7592-3056-3

Silvie P.Vayssières J-FBabin R.Bagny-Beilhe L.Brévault T.Chailleux A.Delatte H.Deletre E.Dufour B.Martin T.Michel B.Pagès C.Pinard F.Ratnadass A.. 2018. Directives pour la gestion d'arthropodes ravageurs transfrontières des plantes autres que les acridiens. Volume I. Montpellier : FAO-CIRAD, 70 p.



1.    ISCE meeting, 2019, Atlanta, USA

2.    AAIS meeting, 2017, Wad Medani, Sudan

3.    III All Africa Horticultural Congress, 2016, Ibadan, Nigeria

4.    XXV International Congress of Entomology, 2016, Orlando, USA

5.    II International whitefly symposium, 2016, Arusha, Tanzania

6.    Mediatec conference (french researchers group in chemical ecology), 2014, Paris, France

7.    CIRA 2014 international congress on pests in agriculture, 2014, Montpellier, France

8.    Congress on natural products and biocontrol, 2014, Perpignan, France

9.    ISCE meeting, 2014, Urbana-Champaign, USA

10.ISCE meeting, 2013, Melbourne, Australia (Student travel award)



African Indigenous Vegetables: From Income Generation to Health and Nutrition, 2019, Nairobi, Kenya

ISCE workshop, 2019, Nairobi, Kenya

Workshop of Horticultural Association of Kenya, 2018, Taita, Kenya (best poster award)

ISCE workshop, 2018, Alnarp, Sweden

First international conference on pesticidal plants, 2013, Nairobi, Kenya

Congress on natural products and biocontrol, 2102, Perpignan, France

Congress of the European society of vector ecology, 2012, Montpellier, France (best poster award)

 International symposium on essential oils, 2012, Lisbon, Portugal




Co-organiser of the workshop Sustainability of agro-ecological pest management:
tackling ecological, evolutionary and sociological challenges with fruit fly research,
September 2016, Montpellier, France

01/01/2012 -31/08/2015:

Founding and active member of the French association of young scientists in chemical ecology and organiser of the first national chemical ecology meeting, June 2013, Montpellier, France




Eco+ : Exploiting semiochemical compounds combined with physical control for the design of an ecologically intensive farming system. (ANR: 2017-2020)

PAIV: Pest of African Indigenous Vegetables ( USAID:  2018-2019)

Kair-Olive: Identification of the attractant kairomone from olive tree to Bactrocera oleae for the design of a mass trapping system (FranceOlive: 2018-2019). 


Pest-Free Fruit: Sustainable intensification of fruit production systems through innovative pest biocontrol technologies (Leapagri:  2018-2021)

HortiNet-CI: Adaptation et développement de l’agriculture protégée aux conditions climatiques et parasitaires de la Côte d’Ivoire (Presed/CI : 2018-2020)

Biological control of aphids on Kalanchoe crops: Identification and assessmentof the efficiency of local natural enemies (MultiFlower company: 2018-2019)

GRABT: Evaluation du potentiel répulsif du Gros-thym contre l’aleurode Bemisa tabaci (EcoPhyto: 2018-2019)

HortImpact: Stimulating production of green leafy vegetables and improving food safety (SNV:  2018)

Biophora: Biocontrol Phoretic Agents (CIRAD: 2017)

 BionetAgro: Netting Technology for small-scale vegetable growers in Africa (USAID:2016-2017)



PhD students (primary supervisor):

1) Seydou Diabaté: Combination of ‘push-pull’ strategy and netting technology for cowpea management in Kenya, (JKUAT university, 2015-2018)

2) Bethelihem Mekonnen: Improving biological control of fruit flies using Oecophylla longinoda (University of Pretoria, 2016-2019)

Best oral communication in AAIS meeting, Abidjan, Cote d'Ivoire, 2019 

3) Pascal Ayelo: Recruitment of natural enemies through semiochemicals for tomato crop protection (University of Pretoria, 2017-2020)


Undergraduate/Msc students (primary supervisor: 1-11; co-supervisor: 12-16)

1)Andy Cadin (2013): Repellent effect of essential oils for the management of A.gambiae

2) Maelle Mallent (2013): Repellent effect of essential oils for the management of B. tabaci

3)Barbara Barkman (2014): repellent effect of natural compounds for the management of B. tabaci

4) Claire Duménil (2014): repellent effect of natural compounds for the management of A. gambiae

5) Aurélien Puisieux (2014): Study of coloured netting for the management of Bemisia tabaci

6) Aurélien Stirnemann (2015): Study of attractant plant for the management of Oecophylla longinoda

7) Jimmy Leyes (2015): Study of repellent natural compounds for the management of Oecophylla longinoda6)  Beth 8)Kerwitha (2017): Effect of tomato trichomes on the oviposition of Tuta absoluta

9) Judy Githiri (2017): Effect of tomato volatiles on attractiveness/repellence of Tuta absoluta

10) Junitor Chepkemoi (2017): Survey of local natural enemies of Bemisia tabaci and Tuta absoluta in Kenya

11) Frank Matu (2018): Study of trap crop plants for the management of Bemisia tabaci (Best poster award, HAK, Kenya, 2018)

12)  Marion Canale (2019): Study of olive tree volatiles on attractiveness/repellence of Bactrocera oleae

13) Sharon Chemweno (2019): Study of lekking and mating behaviour of Bactrocera dorsalis

14) Reagan Okoth (2018): Socio-technical analysis of the tomato value chain in Kenya

15) Aude Sany (2019): Study of political/economic aspects of the tomato value chain in Kenya

16) Virgile Verdi (2019): Study of constraints in tomato value chain for netting technology transfer in Kenya

17) Cyrane Pouet (2019); Evaluation du potentiel répulsif du Gros-thym contre l’aleurode Bemisa tabaci




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