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Tritrophic Interactions Mediated by Zoophytophagous Predator-Induced Host Plant Volatiles

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dc.contributor.author Bashiru, Adams
dc.contributor.author Abdullahi, Ahmed Yusuf
dc.contributor.author Baldwyn, Torto
dc.contributor.author Fathiya, Mbarak Khamis
dc.date.accessioned 2024-08-06T08:12:11Z
dc.date.available 2024-08-06T08:12:11Z
dc.date.issued 2024
dc.identifier.uri http://hdl.handle.net/20.500.12562/2016
dc.description publication en_US
dc.description.abstract The zoophytophagous mirid predator Nesidiocoris tenuis and the ectoparasitoid Stenomesius japonicus are important bio-logical control agents for several agricultural pests including the invasive leafminer, Phthorimaea absoluta, a destructive pest of Solanaceous crops especially tomato in sub-Saharan Africa. However, little is known about how feeding by N. tenuis can influence the tritrophic interactions in the tomato plant. Here, we tested the hypothesis that N. tenuis phytophagy would influence the tritrophic olfactory interactions between the host plant tomato and pest, predator, and parasitoid. In olfactometer assays, P. absoluta females and N. tenuis adults were both attracted to constitutive volatiles released by the tomato plant. Whereas females of P. absoluta avoided volatiles released by N. tenuis-infested plants, S. japonicus females and N. tenuis adults were attracted to the induced volatiles. In coupled gas chromatography-electroantennographic detection (GC-EAD) recordings of intact and N. tenuis-infested plant volatiles, antennae of P. absoluta and S. japonicus females both detected eight components, whereas N. tenuis adults detected seven components which were identified by GC-mass spectrometry (GC-MS) as terpenes and green leaf volatiles (GLVs). Dose-response olfactometer bioassays revealed that the responses of P. absoluta, N. tenuis, and S. japonicus varied with the composition and concentration of blends and individual compounds tested from N tenuis-induced volatiles. Females of P. absoluta showed no preference for an eight-component blend formulated from the individual repellents including hexanal, (Z)-3-hexenyl butanoate, and δ-elemene identified in the volatiles. On the other hand, S. japonicus females were attracted to an eight-component blend including the attractants (E)-2-hexenal, (Z)-3-hexenol, methyl salicylate, β-phellandrene, and (E)-caryophyllene. Likewise, N. tenuis adults were attracted to a seven-component blend including the attractants β-phellandrene, δ-elemene, and (E)-caryophyllene identified in the volatiles. Our findings suggest that there is potential for the use of terpenes and GLVs to manage the insects in the tritrophic interaction. en_US
dc.description.sponsorship African Union (Contract number AURG-II-2-123-2018); the Swedish International Development Cooperation Agency (Sida) the Swiss Agency for Development and Cooperation (SDC) the Federal Democratic Republic of Ethiopia the Govern-ment of the Republic of Kenya University of Pretoria (UP). The first Author (BA) German Academic Exchange Service (DAAD)-In-Region Postgraduate Scholarship through the Af-rican Regional Postgraduate Programme in Insect Science (ARPPIS). Interna-tional Centre of Insect Physiology and Ecology (icipe), Kenya en_US
dc.publisher Journal of Chemical Ecology en_US
dc.rights Attribution-NonCommercial-ShareAlike 3.0 United States *
dc.rights.uri http://creativecommons.org/licenses/by-nc-sa/3.0/us/ *
dc.subject Tomato en_US
dc.subject Terpenes en_US
dc.subject Green leaf volatiles en_US
dc.subject Olfaction en_US
dc.subject Attractants en_US
dc.subject Repellents en_US
dc.title Tritrophic Interactions Mediated by Zoophytophagous Predator-Induced Host Plant Volatiles en_US
dc.type Article en_US


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