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- W2553072145 abstract "<ns4:p>Herbivores emit volatile organic compounds (VOCs) after feeding on plants. Parasitoids exploit these VOCs as odor cues to locate their hosts. In nature, host-related odors are emitted as blends of various compounds occurring in different proportions, and minor blend components can sometimes have profound effects on parasitoid responses. In a previous related study, we identified and quantified VOCs emitted by cotton plant-fed <ns4:italic>Heliothis virescens </ns4:italic>(Lepidoptera: Noctuidae) larvae, an herbivore host of the parasitoid <ns4:italic>Microplitis croceipes</ns4:italic> (Hymenoptera: Braconidae). In the present study, the olfactory response of female <ns4:italic>M</ns4:italic>.<ns4:italic> croceipes</ns4:italic> to synthetic versions of 15 previously identified compounds was tested in electroantennogram (EAG) bioassays. Using <ns4:italic>M. croceipes</ns4:italic> as a model species, we further asked the question: does the relative abundance of a volatile compound match the level of antennal response in parasitoids? Female<ns4:italic> M. croceipes</ns4:italic> showed varying EAG responses to test compounds, indicating different levels of bioactivity in the insect antenna. Eight compounds, including decanal, 1-octen-3-ol, 3-octanone, 2-ethylhexanol, tridecane, tetradecane, α-farnesene and bisabolene, elicited EAG responses above or equal to the 50<ns4:sup>th</ns4:sup> percentile rank of all responses. Interestingly, decanal, which represented only 1% of the total amount of odors emitted by cotton-fed hosts, elicited the highest (0.82 mV) EAG response in parasitoids. On the other hand, (<ns4:italic>E</ns4:italic>)-β-caryophyllene, the most abundant (29%) blend component, elicited a relatively low (0.17 mV) EAG response. The results suggest that EAG response to host-related volatiles in parasitoids is probably more influenced by the ecological relevance or functional role of the compound in the blend, rather than its relative abundance.</ns4:p>" @default.
- W2553072145 created "2016-11-30" @default.
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- W2553072145 date "2017-03-09" @default.
- W2553072145 modified "2023-10-03" @default.
- W2553072145 title "Electroantennogram response of the parasitoid, Microplitis croceipes to host-related odors: The discrepancy between relative abundance and level of antennal responses to volatile compound" @default.
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- W2553072145 doi "https://doi.org/10.12688/f1000research.10104.2" @default.
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