(11Z,13E)-Hexadecadien-1-yl Acetate: Sex Pheromone of the Grass Webworm Herpetogramma licarsisalis—Identification, Synthesis, and Field Bioassays
作者:Andrew R. Gibb、D. Max Suckling、Ashraf M. El-Sayed、Björn Bohman、C. Rikard Unelius、Jennifer J. Dymock、Michelle L. Larsen、Bruce E. Willoughby
DOI:10.1007/s10886-007-9259-4
日期:2007.3.13
The grass webworm Herpetogramma licarsisalis (Lepidoptera: Crambidae), which has recently established in pasture in Northland, New Zealand, is an important pest of many tropical and subtropical grasses. Two pheromone components, (Z)-11-hexadecen-1-yl acetate (Z11–16:Ac) and (11Z,13E)-hexadecadien-1-yl acetate (Z11,E13–16:Ac), were identified in pheromone gland extracts of female moths by gas chromatography (GC), GC-electroantennographic detection, and GC-mass spectrometry in conjunction with microchemical tests (dimethyldisulfide and 4-methyl-1,2,4-triazoline-3,5-dione derivatizations). Z11,E13–16:Ac and its geometric isomer (11E,13Z)-hexadecadien-1-yl acetate (E11,Z13–16:Ac) were synthesized via stereoselective Wittig reactions, and the identity of the diene present in the pheromone glands was confirmed to be Z11,E13–16:Ac. Field bioassays at Indooroopilly in Brisbane, Australia, established that Z11,E13–16:Ac was necessary and sufficient for attraction of male grass webworm moths and that the corresponding alcohol, (11Z,13E)-hexadecadien-1-ol (Z11,E13–16:OH), had a strong inhibitory effect on trap catches at the ratios tested. When mixed with Z11,E13–16:Ac in various ratios, Z11–16:Ac had no effect on the attractiveness of lures.
草网虫Herpetogramma licarsisalis(鳞翅目:稻蝇科)最近在新西兰北地的牧场建立,是许多热带和亚热带草类的重要害虫。通过气相色谱(GC)、气相色谱-电极嗅觉检测(GC-EAD)和气相色谱-质谱(GC-MS)结合微化学测试(亚砜和4-甲基-1,2,4-三唑啉-3,5-二酮衍生化),在雌蛾的信息素腺提取物中确定了两种信息素成分,分别是(Z)-11-己十烯-1-基乙酸(Z11–16:Ac)和(11Z,13E)-己二烯-1-基乙酸(Z11,E13–16:Ac)。Z11,E13–16:Ac及其几何异构体(11E,13Z)-己二烯-1-基乙酸(E11,Z13–16:Ac)通过立体选择性Wittig反应合成,确认信息素腺中存在的二烯为Z11,E13–16:Ac。在澳大利亚布里斯班的Indooroopilly进行的田间生物测定表明,Z11,E13–16:Ac是吸引雄性草网虫蛾所必需和充分的,而相应的醇(11Z,13E)-己二烯-1-醇(Z11,E13–16:OH)在测试的比例下对捕捉具有强抑制作用。当与Z11,E13–16:Ac以不同比例混合时,Z11–16:Ac对诱捕器的吸引力没有影响。