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α-Terpineol: An Aggregation Pheromone in Optatus palmaris (Coleoptera: Curculionidae) (Pascoe, 1889) Enhanced by Its Host-Plant Volatiles.

ABSTRACT: The Annonaceae fruits weevil (Optatus palmaris) causes high losses to the soursop production in Mexico. Damage occurs when larvae and adults feed on the fruits; however, there is limited research about control strategies against this pest. However, pheromones provide a high potential management scheme for this curculio. Thus, this research characterized the behavior and volatile production of O. palmaris in response to their feeding habits. Olfactometry assays established preference by weevils to volatiles produced by feeding males and soursop. The behavior observed suggests the presence of an aggregation pheromone and a kairomone. Subsequently, insect volatiles sampled by solid-phase microextraction and dynamic headspace detected a unique compound on feeding males increased especially when feeding. Feeding-starvation experiments showed an averaged fifteen-fold increase in the concentration of a monoterpenoid on males feeding on soursop, and a decrease of the release of this compound males stop feeding. GC-MS analysis of volatiles identified this compound as α-terpineol. Further olfactometry assays using α-terpineol and soursop, demonstrated that this combination is double attractive to Annonaceae weevils than only soursop volatiles. The results showed a complementation effect between α-terpineol and soursop volatiles. Thus, α-terpineol is the aggregation pheromone of O. palmaris, and its concentration is enhanced by host-plant volatiles.

SUBMITTER: Pineda-Rios JM

PROVIDER: S-EPMC8150320 | biostudies-literature |

REPOSITORIES: biostudies-literature

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The Common Natural Products (S)-α-Terpineol and (E)-2-Hexenol are Important Pheromone Components of Megacyllene antennata (Coleoptera: Cerambycidae).

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A revision of some species of Souvanna Breuning, 1963, Mispila Pascoe, 1864, and Athylia Pascoe, 1864 (Coleoptera, Cerambycidae, Lamiinae).

Project description:Alidussignatus Pic, 1926 is transferred from Mispila to Souvanna, and Souvannasignata (Pic, 1926), comb. nov. is proposed. The lectotype of Alidussignatus is designated. The following synonyms are proposed: Souvannasignata = Athylia (s. str.) quadristigma (Gressitt, 1940), syn. nov. = Souvannaphoumai Breuning, 1963, syn. nov. = Mispila (Dryusa) coomani Breuning, 1968, syn. nov., Mispila (s. str.) tenuevittata (Pic, 1930) = Mispila (s. str.) assamensis Breuning, 1938, syn. nov. The gender of the holotype of Alidusmultilineatus Pic, 1925 is determined. New distributional records for Souvannasignata, Mispilacurvilinea Pascoe, 1869, M.subtonkinea Breuning, 1968 and M.tenuevittata are provided.

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