| Title: | Identification and field bioassays of the sex pheromone of Eurytoma maslovskii (Hymenoptera: Eurytomidae) |
| Author(s): | Yang CY; Mori K; Kim J; Kwon KB; |
| Address: | "Horticultural and Herbal Crop Environment Division, National Institute of Horticultural and Herbal Science, Wanju, Republic of Korea. cyyang@korea.kr. Photosensitive Materials Research Center, Toyo Gosei Co., Ltd, 4-2-1 Wakahagi, Inzai-shi, Chiba, 270-1609, Japan. Forest Insect Pests and Diseases Division, National Institute of Forest Science, Seoul, Republic of Korea. AD Corporation, Andong, Gyeongsangbuk-do, Republic of Korea" |
| DOI: | 10.1038/s41598-020-67252-7 |
| ISSN/ISBN: | 2045-2322 (Electronic) 2045-2322 (Linking) |
| Abstract: | "Long-range sex pheromones are generally considered to be a main cue for mate recognition in the order Hymenoptera. Although considerable attention has been given to the identification of semiochemicals in the superfamily Chalcidoidea, which comprises 19 families, no study has identified active components in a field bioassay. We herein report the sensitive and selective pheromone communication system of the Korean apricot wasp, Eurytoma maslovskii (Eurytomidae), whose larvae feed on Prunus mume seeds. Using gas chromatography coupled with electroantennographic detection (GC-EAD) and mass spectrometry (GC-MS), we detected 2,10-dimethyldodecyl propionate and 2,8-dimethyldecyl propionate in thoracic extracts of female E. maslovskii at a ratio of 8:2 as the active pheromone components. Field experiments showed that the attractive effect of the two compounds is highly enantioselective. Racemic 2,10-dimethyldodecyl propionate and 2,8-dimethyldecyl propionate were not attractive to E. maslovskii males. In bioassays with single enantiomers, the (2 S,10 R)-enantiomer was highly attractive to male wasps, and the (2 S,8 S)-enantiomer was also attractive, although to a lesser degree. No synergistic effect between (2 S,10 R)- and (2 S,8 S)-enantiomers was identified, and the (2 S,10 R)-enantiomer alone caught significantly more males than the natural pheromone extracts. The addition of other enantiomers to the (2 S,10 R)-isomer significantly decreased the attraction of conspecific males. In addition, a very low dose of synthetic pheromone attracted conspecific males, showing that both female signaling and male response traits may have evolved to contribute to species-specific sexual communication in this species" |
| Keywords: | *Animal Communication Animals Biological Assay Female Gas Chromatography-Mass Spectrometry Larva Male Prunus/parasitology Seeds/parasitology Sex Attractants/chemistry/isolation & purification/*physiology Species Specificity Stereoisomerism Wasps/*physiolo; |
| Notes: | "MedlineYang, Chang Yeol Mori, Kenji Kim, Junheon Kwon, Ki Bong eng Research Support, Non-U.S. Gov't England 2020/06/26 Sci Rep. 2020 Jun 24; 10(1):10281. doi: 10.1038/s41598-020-67252-7" |
