Host conspecific infestation level guides the preference of Hypothenemus hampei for robusta coffee berry volatiles
The cofee berry borer (CBB), Hypothenemus hampei, is the major insect pest of cofee crops worldwide. Cofee berry borer females use cofee berry volatiles during host-searching behaviour. Nonetheless, conspecifc infestation is a factor that may afect cofee berry volatile profle and so the attraction of CBB females to cofee berries. In this study, we evaluated the attraction of CBB females to volatiles from healthy Cofea canephora berries and three diferent conspecifc infestation levels in laboratory and feld assays. We used solid-phase microextraction coupled with gas chromatography–mass spectrometry to identify the volatile compounds in the efuvia of cofee berries. Overall, our laboratory bioassays showed that CBB females were more attracted to the volatiles emitted by healthy berries and those with early and medium infestation levels than to late-infested berries. The feld assay showed that traps baited with healthy berries or berries with early infestations attracted more CBB females than those baited with berries with the late infestations. The chemical analyses showed that healthy berries emitted 21 compounds, with ethyl isovalerate, ∝-pinene camphene, β-pinene, and limonene in higher amounts. Berries with an early infestation emitted 22 compounds including methyl salicylate, trans-β-ocimene, and linalool as the major compounds. Berries with a medium infestation released 15 compounds with methyl salicylate, trans-β-ocimene, and an unknown monoterpenoid in higher amounts. Berries with late infestation emitted only six compounds with tetradecane, tridecane, and dodecanol as the major compounds. The results of this study showed that the conspecifc infestation of robusta cofee berries afects CBB female attraction.
| Main Authors: | , , |
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| Format: | Texto biblioteca |
| Language: | eng |
| Subjects: | Broca del cafeto, Coffea canephora, Plantas huéspedes, Compuestos volátiles, Semioquímicos, Artfrosur, |
| Online Access: | https://link.springer.com/content/pdf/10.1007/s11829-021-09845-1.pdf |
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