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J Econ Entomol

Title:		Evidence of Premating Isolation Between Two Sibling Moths: Ectropis grisescens and Ectropis obliqua (Lepidoptera: Geometridae)
Author(s):		Luo ZX; Li ZQ; Cai XM; Bian L; Chen ZM;
Address:		"Key Laboratory of Tea Biology and Resource Utilization, Ministry of Agriculture, Tea Research Institute, Chinese Academy of Agricultural Science, China"
Journal Title:		J Econ Entomol
Year:		2017
Volume:		110
Issue:		6
Page Number:		2364 - 2370
DOI:		10.1093/jee/tox216
ISSN/ISBN:		1938-291X (Electronic) 0022-0493 (Linking)
Abstract:		"The sex pheromones of Ectropis grisescens Warren and Ectropis obliqua Prout were both reported to contain (Z,Z,Z)-3,6,9-octadecatriene (Z3,Z6,Z9-18:H) and (Z,Z)-3,9-cis-6,7-epoxy-octadecadiene (Z3,epo6,Z9-18:H). To clarify how these two sibling geometrids maintain premating isolation, the female sex pheromones of the two species were reexamined. Gas chromatography-electroantennographic detection (GC-EAD) and gas chromatography-mass spectrometry revealed two GC-EAD-active compounds, Z3,Z6,Z9-18:H and Z3,epo6,Z9-18:H, in E. grisescens female pheromone glands as well as an additional GC-EAD-active compound, (Z,Z)-3,9-cis-6,7-epoxy-nonadecadiene (Z3,epo6,Z9-19:H), in E. obliqua female pheromone glands. Synthesized Z3,Z6,Z9-18:H and Z3,epo6,Z9-18:H elicited dose-dependent electroantennogram (EAG) responses from male antennae of both E. grisescens and E. obliqua. However, Z3,epo6,Z9-19:H only elicited dose-dependent EAG responses from E. obliqua and limited EAG responses from E. grisescens at all doses. In wind-tunnel studies, lures that contained Z3,Z6,Z9-18:H and Z3,epo6,Z9-18:H attracted E. grisescens males and had no effect on E. obliqua males. The addition of Z3,epo6,Z9-19:H to the blend of Z3,Z6,Z9-18:H and Z3,epo6,Z9-18:H strongly attracted E. obliqua males but had a limited attraction for E. grisescens males. Thus, Z3,Z6,Z9-18:H and Z3,epo6,Z9-18:H were sex pheromone components of E. grisescens, whereas Z3,Z6,Z9-18:H, Z3,epo6,Z9-18:H and Z3,epo6,Z9-19:H were sex pheromone components of E. obliqua. The presence or absence of Z3,epo6,Z9-19:H played a central role in the premating isolation of these two sibling species"
Keywords:		"Animals Female Gas Chromatography-Mass Spectrometry Male Moths/*physiology *Reproductive Isolation Sex Attractants/analysis/*metabolism (Z, Z)-3, 9-cis-6, 7-epoxy-nonadecadiene Ectropis grisescens Ectropis obliqua Premating isolation Sex pheromones;"
Notes:		"MedlineLuo, Z X Li, Z Q Cai, X M Bian, L Chen, Z M eng Research Support, Non-U.S. Gov't England 2017/10/14 J Econ Entomol. 2017 Dec 5; 110(6):2364-2370. doi: 10.1093/jee/tox216"