Dery Mark, Arriola Kyle, Lee Chow-Yang, Choe Dong-Hwan
Department of Entomology, University of California, Riverside, CA 92521, USA.
Department of Chemistry, University of California, Riverside, CA 92521, USA.
Insects. 2020 Nov 5;11(11):759. doi: 10.3390/insects11110759.
Bed bugs produce volatile aldehydes that have alarm and aggregation functions. Using two synanthropic bed bug species, L. and (Fabricius), developmental changes were examined for ()-2-hexenal, 4-oxo-()-2-hexenal, ()-2-octenal, and 4-oxo-()-2-octenal, the four most abundant aldehydes shared between the two species. Quantitative analyses of the aldehydes in the nymphal exuviae indicated that the aldehydes' ratio remained similar throughout nymphal development. In general, ()-2-octenal was most abundant, and ()-2-hexenal and 4-oxo-()-2-octenal were least abundant. The fourth aldehyde, 4-oxo-()-2-hexenal, was present in intermediate quantities. The quantities and percent abundances of the aldehydes in nymphal exuviae and the adults were significantly different between and . The ratio between ()-2-hexenal and ()-2-octenal was determined in adult male and female bed bugs of each species. Adult had a higher proportion of ()-2-hexenal than , while no sex differences were found. This work provides the first systematic quantification of four aldehydes [()-2-hexenal, 4-oxo-()-2-hexenal, ()-2-octenal and 4-oxo-()-2-octenal] for all five of the nymphal stages for both and .
臭虫会产生具有警报和聚集功能的挥发性醛类物质。利用两种与人类共生的臭虫物种，即温带臭虫（Cimex lectularius）和热带臭虫（Cimex hemipterus (Fabricius)），对两种物种共有的四种含量最丰富的醛类物质，即（E）-2-己烯醛、4-氧代-（E）-2-己烯醛、（E）-2-辛烯醛和4-氧代-（E）-2-辛烯醛的发育变化进行了研究。对若虫蜕壳中醛类物质的定量分析表明，在若虫发育过程中醛类物质的比例保持相似。一般来说，（E）-2-辛烯醛含量最高，（E）-2-己烯醛和4-氧代-（E）-2-己烯醛含量最低。第四种醛类物质4-氧代-（E）-2-己烯醛含量处于中间水平。温带臭虫和热带臭虫若虫蜕壳及成虫中醛类物质的含量和相对丰度存在显著差异。测定了每种物种成年雄性和雌性臭虫中（E）-2-己烯醛与（E）-2-辛烯醛的比例。成年温带臭虫中（E）-2-己烯醛的比例高于热带臭虫，且未发现性别差异。这项工作首次对温带臭虫和热带臭虫所有五个若虫阶段的四种醛类物质[（E）-2-己烯醛、4-氧代-（E）-2-己烯醛、（E）-2-辛烯醛和4-氧代-（E）-2-辛烯醛]进行了系统定量。
