본 종설에서는 벼와 옥수수, 콩과작물, 감자, 들깨, 참깨에 대한 주요 나비목 해충 22종의 성페로몬 조성에 대해 국내외에서 연구된 결과들 을 비교하면서 성충 예찰 수단으로 활용 가능한지를 분석하여 간단하게 정리하였다. 이 중 4종의 국내 개체군에서는 성페로몬샘 추출물로부터 성 페로몬 성분들이 동정되고, 야외실험을 통해 그 조성이 규명되었다. 다른 3종에 대해서는 국내 개체군을 이용한 페로몬 화합물의 화학적 동정과 정은 없었으나, 보고된 성페로몬 성분들을 이용한 실내 및 야외에서의 세밀한 조성실험을 통해 국내 개체군에 대한 최적 예찰조성이 선발되었다. 일부 종에 대해서는 최적 예찰미끼 개발을 위해 성페로몬샘에서 발견되는 미량성분의 역할에 대해 검토할 필요가 있다.
The Red-spotted Apollo Butterfly (Parnassius bremeri ) is member of Snow Apollo Butterfly in Genus Parnassius which has been designated as the most endangered insect around the world and recorded in IUCN Red List of Threatened Animals and Appendix II in CITES. The lack of distributional information of Parnassius bremeri is one of the main problems when trying to assess the threats to and planning conservation strategies for this endangered species. The pheromone method made it easier to detect local populations of the species, not to disturb the habitat and can be used by providing a useful tool for conservation research. Sampling by breeding captivity in Holoce Ecosystem Conservation Research Institution (HECRI) was used. Each of 3 individuals male, mated and unmated female, end of the abdomen tissue and abdominal tissue containing the sphragis were cut. The pheromone was extracted as method presented by Hernández-Roldán et al. (2014). Among pheromone fatty alcohol to the (Z, Z, Z) -9,12,15-octadecatrien-1-ol and Eicosane classified as hydrocarbon of unmated female was detected higher rate than mated female. Two pheromone can be helpful to attract males in potential population.
Two Grapholita congeners, G. dimorpha and G. molesta, are internal fruit feeders and their young larvae cause serious damages to pome and stone fruits in Korea. They share similar morphological and biological characters not to be easily discriminated. We needed to develop molecular markers using diagnostic primers and PCR-RFLP with specific sequences in ND4 region. Two species have similar sex pheromone components (Z8-12:Ac and E8-12:Ac) although their composition ratios are different. In fields, G. molesta males were more captured in lures with higher Z8 component ratio than G. dimorpha males. Addition of Z8-12OH, minor sex pheromone component prevented G. dimorpha from capturing G. molesta males. In electroantennogram (EAG) bioassay, these two species males showed significant electric responses in their own sex pheromone ratios. An addition of Z8-12:OH to the major sex pheromone components significantly suppressed the EAG response of G. dimorpha, while it did not change that of G. molesta. A deep sequencing analysis of transcripts of both species pheromone glands identified sex pheromone biosynthesis genes including fatty acid synthase, desaturases, fatty acyl reductase (FAR), and aldehyde reductase. The presence of delta 10 desaturase in both species suggests that a double bond at C8 position in dodecenyl acetate is produced by desaturation at C10 position of tetradecenyl fatty acid and subsequent β-oxidation, which is then reduced at carboxylic acid by FAR to be acetylated by acetyl transferase. High sequence variation of FAR genes of G. molesta and G. dimorpha suggests their stereoisomer substrate preference, which may exert a driving force for this speciation with delta 10 desaturase.
From a chemist's perspective, Scarabaeidae is one of the most exciting group of insects to work on the isolation, identification, and synthesis of sex pheromones because-as opposed to Lepidoptera, which by and large utilizes straight chain alcohols, aldehydes, and acetates-the pheromonal chemistry of scarab beetles is remarkably diverse. While species in the subfamily Rutelinae utilize pheromone constituents, which are presumably fatty acid derivatives, the more primitive species in the subfamily Melolonthinae use phenolic, amino acid derivative, and terpenoid compounds. Here, I discuss the recent advances we have accomplished in the identification of scarab sex pheromones with especial emphasis on their chemical diversity. Also, I discuss the potential role of these sex pheromones in insect pest management. Field tests revealed that, in contrast to what has been frequently observed in the Lepidoptera, the higher the dosage of sex pheromone loaded in the traps the greater the capture of scarab beetles. These data suggest that mass trapping is more likely to be useful for scarab pest management than mating distruption.