中红侧沟茧蜂气味结合蛋白MmedOBP18的原核表达及配体结合特性

【目的】研究中红侧沟茧蜂Microplitis mediator气味结合蛋白MmedOBP18在触角中的表达定位,解析MmedOBP18重组蛋白的配体结合特性。【方法】原核表达中红侧沟茧蜂气味结合蛋白MmedOBP18;采用荧光免疫组织化学技术研究MmedOBP18在中红侧沟茧蜂雌蜂触角中的表达定位;通过荧光竞争结合实验分析MmedOBP18重组蛋白与99种候选配体的结合特性。【结果】在原核表达系统中成功表达MmedOBP18重组蛋白。荧光免疫定位结果显示MmedOBP18主要表达在触角锥形感器Ⅰ内的淋巴液中。荧光竞争结合实验结果表明,MmedOBP18重组蛋白能够与16种候选配体结合,与低挥发性植物挥发物2-十三酮、十二醛、十四酸和十一酸的结合能力最强,其解离常数K_i值分别为5.21, 6.42, 6.49和6.58μmol/L;而且MmedOBP18重组蛋白与非挥发性植物次生物质棕榈酸、棉酚、槲皮素及亚麻酸也有较强的结合能力,K_i值分别为3.86, 5.07, 5.08和6.51μmol/L;此外,MmedOBP18重组蛋白与鳞翅目昆虫性信息素组分顺-9-十四碳烯醛及顺-11-十六碳醛表现出较强的结合能力,K_i值分别为9.09和11.67μmol/L,提示该蛋白在寄主定位过程中可发挥重要的作用。【结论】中红侧沟茧蜂气味结合蛋白MmedOBP18能够结合长链低挥发和非挥发性化合物,推测其在嗅觉和味觉识别中发挥双重功能,主要参与对寄主和寄主生境的化学信息的近距离识别。     

气味结合蛋白MmedOBP19在中红侧沟茧蜂足部的表达及配体结合特征

【目的】明确气味结合蛋白基因Mmed OBP19在中红侧沟茧蜂Microplitis mediator足部的表达定位及重组Mmed OBP19的配体结合特征。【方法】利用扫描电镜观察化学感器在中红侧沟茧蜂足部的分布,通过原位杂交研究Mmed OBP19在中红侧沟茧蜂雌蜂前足中的表达定位,并采用荧光竞争结合实验分析Mmed OBP19重组蛋白与86种潜在配体的结合特征。【结果】扫描电镜观察发现,中红侧沟茧蜂的足部主要分布3种类型的感器,分别是毛形感器、刺形感器和锥形感器。原位杂交结果显示,Mmed OBP19的表达主要集中在中红侧沟茧蜂前足跗节的感器下方。重组Mmed OBP19与配体的结合力测定结果显示,Mmed OBP19与非挥发性植物次生物质包括棉酚(K_i=2.32±0.17μmol/L)、硫酸黄连素(K_i=4.86±1.81μmol/L)、槲皮素(K_i=4.93±0.21μmol/L)、单宁(K_i=5.23±0.38μmol/L)、芸香叶苷(K_i=5.91±0.26μmol/L)和奎宁(K_i=6.05±0.51μmol/L)等具有较强的结合能力,同时能够结合油酸(K_i=4.32±1.73μmol/L)及亚油酸(K_i=3.55±0.44μmol/L),但与柠檬烯(K_i=12.65±2.55μmol/L)的结合力较弱。【结论】推测中红侧沟茧蜂足部具有化学感受功能,Mmed OBP19主要参与中红侧沟茧蜂足部味觉识别过程。     

甜菜夜蛾化学感受蛋白SexiCSP3结合特性分析

本研究构建夜蛾科昆虫化学感受蛋白系统进化树,发现化学感受蛋白在种间保守性强,并与气味结合蛋白明显分为两类。运用反转录RT-PCR方法克隆了Sexi CSP3基因,并在大肠杆菌中正确表达,重组Sexi CSP3蛋白纯化后通过荧光竞争结合实验测定其与24种外源气味分子的结合特性。结果表明:Sexi CSP3与苯甲醛、苯乙酮、2-戊基-3-苯丙基-烯醛、1-苯基-1-丁酮、对甲氧基苯甲醛的结合能力较强,解离常数为0.76、1.39、2.23、3.23和5.30μmol/L,推测Sexi CSP3可能参与了甜菜夜蛾对这5种化学物质的识别过程。     

中红侧沟茧蜂对棉花挥发性物质的触角电位反应

中红侧沟茧蜂Microplitis mediator (Haliday) 是棉铃虫 Helicoverpa amigera (Hübner)的主要寄生蜂之一。在寻找害虫的过程中,害虫的寄主植物释放出的气味起着至关重要的作用。本文测定了中红侧沟茧蜂雌蜂对棉花中17种气味物质的触角电位反应,比较了雌雄茧蜂对6种气味反应的差别,并且测定了雌蜂对4种气味物质的剂量 反应。结果表明,在所测的气味物质中,中红侧沟茧蜂对脂肪族化合物的反应最强,对芳香族化合物的反应居中,而对萜类化合物的反应较弱。对所测的气味物质的反应,雌雄茧蜂之间的差异不显著。雌蜂对正己醛、苯乙酮、正壬醇的反应阈值为25 μL, 对苯甲醛的反应阈值为250 μL,在所测的浓度范围内,对4种化合物的反应均未达到饱和。     

二化螟盘绒茧蜂及稻虱缨小蜂对挥发物的嗅觉反应

【目的】揭示二化螟盘绒茧蜂Apanteles chilonis Munakata与稻虱缨小蜂Anagrus nilaparvatae对单一水稻挥发物组分的选择行为,了解水稻挥发物在其寄主搜寻过程中的作用,为水稻害虫寄生蜂引诱剂的研发提供技术基础。【方法】利用Y型嗅觉仪测定了二化螟盘绒茧蜂与稻虱缨小蜂对11种水稻挥发物组分(反-2-己烯醛、α-蒎烯、乙酸叶醇酯、芳樟醇、β-石竹烯、反-3-己烯醛、水杨酸甲酯、罗勒烯、苯甲醛、2-壬酮、柠檬烯)的嗅觉行为反应。【结果】β-石竹烯(10、50μg/kg)、罗勒烯(0.1、1、10μg/kg)、2-壬酮(10μg/kg)及反-2-己烯醛(50μg/kg)对二化螟盘绒茧蜂行为具有显著影响;稻虱缨小蜂对反-2-己烯醛(50μg/kg)、反-3-己烯醛(1、10、50μg/kg)、芳樟醇(0.1、1、10μg/kg)、β-石竹烯(0.1、50μg/kg)、罗勒烯(1μg/kg)、α-蒎烯(1μg/kg)和水杨酸甲酯(0.1、1、10、50μg/kg)有显著的嗅觉反应。【结论】寄生蜂对水稻挥发性气味的识别与挥发物的种类和浓度有很大关系,研发水稻害虫寄生蜂的引诱剂时需考虑挥发物的种类与浓度。     

淡足侧沟茧蜂气味结合蛋白MpOBP8的基因克隆及原核表达分析

【目的】MpOBP8是淡足侧沟茧蜂Microplitis pallidipes Szepligeti的气味结合蛋白,对于昆虫感知外界气味物质起着不可替代的作用。本研究旨在通过MpOBP8的克隆及其优化表达,获得可溶性目的蛋白,探索其嗅觉识别的分子机理。【方法】通过半定量PCR对其组织差异表达进行分析;通过双酶切构建融合表达载体pET32a(+)-MpOBP8,在大肠杆菌中对其进行原核表达分析并对其表达条件进行了优化。【结果】克隆得到了淡足侧沟茧蜂MpOBP8基因(GenBank登录号:MG457156),该基因含有459 bp的开放阅读框,编码152个氨基酸,推测分子量为17.57ku,预测PI值为4.78。通过半定量PCR,在触角中检测到MpOBP8的表达,而在头、胸、腹中均未检测出表达。对其原核表达条件的优化显示:最佳诱导温度、诱导时间、诱导时机、异丙基-β-D-硫代半乳糖苷(IPTG)的终浓度分别为25℃、6 h、菌体培养液OD_(600)为0.1-0.3和0.1 mmol·L~(-1)。大多数的靶蛋白能以上清形式表达,并通过纯化和浓缩得到了高浓度的靶蛋白。【结论】该研究克隆了淡足侧沟茧蜂的MpOBP8基因,并对其原核表达条件进行了优化,探明了该蛋白的最优表达条件,大量获得该气味结合蛋白,为后期研究MpOBP8的嗅觉识别分子机理奠定基础。     

中红侧沟茧蜂对烟草挥发物的触角电生理及行为反应

中红侧沟茧峰 Microplitis mediator是棉铃虫 H elicoverpa armigera的主要内寄生蜂 ,是优良的蜂种 ,在生物防治上具有广阔的应用前景。但迄今 ,有关中红侧沟茧蜂的化学生态的研究甚少。利用触角电位技术 ,测定了中红侧沟茧蜂对烟草叶片粗提物和烟草中 10种挥发物的触角电生理反应 ,并测定了中红侧沟茧蜂的触角电位反应随日龄的变化。以嗅觉仪测定了中红侧沟茧蜂对烟草粗提物、烟草中 4种挥发物的行为反应。结果表明中红侧沟茧蜂利用烟草释放的气味向烟草定向 ,进而找到其寄主——棉铃虫 ,也佐证了烟草同样是棉铃虫的重要寄主植物的论点。雌蜂对脂肪族化合物反应最强 ,对芳香族化合物和糠醛 (杂环化合物 )的反应居中 ,对萜类化合物反应较弱或者不反应。表明烟草挥发性物质在中红侧沟茧蜂寻找寄主的过程中起着重要的作用 ,但挥发物各组分的作用存在着差异。雌性中红侧沟茧蜂对顺 - 3-己烯醇的触角电位反应随日龄的增加而变化。 1日龄的雌蜂的反应较弱 ,2日龄、3日龄的雌蜂反应较强 ,4日龄、5日龄的雌蜂的反应又减弱。这与该蜂产卵习性相符 :羽化当天的雌蜂产卵较少 ,羽化 2～ 3d之后的雌蜂产卵量较大     

中红侧沟茧蜂对不同龄期棉铃虫幼虫及其为害棉株的趋性反应

研究中红侧沟茧蜂Microplitis mediator Haliday对棉铃虫Helicoverpa armigera Hübner幼虫及其为害棉株的趋性行为, 可为高效应用中红侧沟茧蜂控制棉铃虫提供理论依据。本研究在实验室内以中红侧沟茧蜂雌蜂、1~5龄棉铃虫幼虫及其为害棉花植株（去虫或未去虫）为试验材料, 采用“Y”型昆虫嗅觉仪测定了中红侧沟茧蜂雌蜂对1~5龄棉铃虫幼虫及其为害棉株的趋性行为反应。结果表明: 中红侧沟茧蜂对3龄、4龄和5龄棉铃虫幼虫均没有明显的趋向行为反应, 1龄和2龄棉铃虫幼虫对中红侧沟茧蜂有显著的引诱作用。此外, 1~5龄棉铃虫幼虫为害后去虫棉株与健康棉株均对中红侧沟茧蜂有吸引作用。在未去虫的处理中, 虫害诱导棉株比健康植株更能吸引中红侧沟茧蜂, 与健康植株差异显著, 而且不同龄期棉铃虫幼虫为害处理间差异较大, 对中红侧沟茧蜂引诱作用的相对顺序为: 5龄为害植株>2龄和4龄为害植株>1龄和3龄为害植株 (2龄和4龄为害处理间差异不显著; 1龄和3龄为害处理间差异不显著)。本研究结果可为中红侧沟茧蜂在生物防治上的应用提供一定的理论指导和实践依据。     

白蜡窄吉丁气味结合蛋白AplaOBP3的免疫定位及配体结合特性

【目的】本研究旨在解析白蜡窄吉丁Agrilus planipennis气味结合蛋白AplaOBP3在触角中的定位及配体结合特性,同时比较AplaOBP3与已报道的AplaOBP1和AplaOBP2的功能异同。【方法】原核表达白蜡窄吉丁气味结合蛋白AplaOBP3,制备多克隆抗体并进行Western blot检测;采用免疫组织化学技术在白蜡窄吉丁触角感器中对AplaOBP3的表达进行定位;通过荧光竞争结合实验分析AplaOBP3重组蛋白与58种化合物的结合特性,并与前期报道的白蜡窄吉丁AplaOBP1和AplaOBP2蛋白的配体结合特性进行比较。【结果】原核表达系统中成功表达AplaOBP3重组蛋白;免疫定位结果显示AplaOBP3在白蜡窄吉丁触角的锥形感器类型I中表达。荧光竞争结合实验结果表明,重组AplaOBP3蛋白与反-2-己烯醛、苯甲醛、4′-乙基苯乙酮、β-紫罗兰酮和罗勒烯具有强的结合能力,其解离常数KD值分别为6.20,4.03,5.24,1.72和4.83 μmol/L。AplaOBP3与AplaOBP2具有相似的表达及配体结合特性。【结论】白蜡窄吉丁气味结合蛋白AplaOBP3与AplaOBP2具有相似的表达及配体结合特性,它们可能共同参与白蜡窄吉丁的嗅觉感受,在白蜡窄吉丁寄主定位过程中发挥作用。     

清道夫受体MmSCRA-1调控中红侧沟茧蜂发育的作用研究

清道夫受体(scavenger receptors,SCRs)是细胞表面的一类跨膜糖蛋白,参与识别多种病原体。中红侧沟茧蜂Micropilits mediator有13个清道夫受体基因,为探究其功能,本文通过系统进化分析,确定与其他物种进化关系,并运用实时荧光定量PCR (qRT-PCR)技术检测中红侧沟茧蜂不同发育时期SCRs基因mRNA的表达水平。选取表达水平较高的A型清道夫受体MmSCRA-1基因进行RNA干扰。结果表明,中红侧沟茧蜂蛹期3日龄注射dsRNA后,dsSCRA-1注射组羽化率显著低于dsGFP注射组(P 0. 05),蛹期3. 5日龄注射dsRNA后,两组羽化率都升高,但dsSCRA-1注射组羽化率仍显著低于dsGFP注射组(P 0. 05)。干扰中红侧沟茧蜂MmSCRA-1基因后,其羽化率降低,说明MmSCRA-1基因在中红侧沟茧蜂蛹期发育过程中起到关键作用。     

Ionones and βIonylideneacetic Acids: Their Influence on Abscisic Acid Biosynthesis by Cercospora rosicola

Several ionones and β-ionylideneacetic acids inhibited absicisic acid (ABA) biosynthesis in Cercospora rosicola at 100 μm. At lower concentrations, α-ionone, 1′,2′-dihydroxy-l′,2′-dihydro-β-ionone and 4′-keto-α-ionone enhanced ABA biosynthesis. Conversions of ionones by C. rosicola were identified by GC-MS as: α-ionone to 4′-keto-α-ionone, 4′-keto-α-ionol and dehydrovomifoliol; and 1′-hydroxy-α-ionone to dehydrovomifoliol. The oxidations of α-ionone and its analogs parallel those of the α-ionylideneacetic acids. The β-ionylideneacetic acids were generally oxidized to more polar forms. Metabolites identified by GC-MS were 3′-hydroxy-, 3′-keto- and 1′,2′-epoxy-1′,2′-dihydro-β-ionylideneacetic acids. The fungus rapidly metabolized most exogenous materials to more polar forms.     

Studies on Abscisic Acid

Oxidation of 2-cis-α-ionylidene-ethanol (II) with active MnO₂ afforded a mixture of 2-cis and 2-trans-α-ionylideneacetaldehydes (III and IV). Reduction of methyl epoxy-α- and -β-ionylideneacetates (Vb, Xb XXIb and XXIIb) with LiAlH₄ gave the diols (VI, XI, XXIII and XXIV). The Wittig reaction of the hydroxyketones (XIII and XVIII) with carbethoxymethylenetriphenylphosphorane, followed by alkaline hydrolysis, yielded 5-(1′-and 2′-hydroxy-2′,6′,6′-trimethyl-1′-cyclohexyl)-3-methylpentadienoic acids (XIVa, XVa, XIXa and XXa). The reaction of α-cyclocitrylideneacetaldehyde (XXVII) and dihydro-α-ionone (XXXIII) with carbethoxymethylenetriphenylphosphorane afforded ethyl 3-demethyl-α-ionyli-deneacetate (XXVIIIb) and ethyl dihydro-α-ionylideneacetates (XXXIVb and XXXVb). Physiological activities of the above synthesized compounds on rice seedlings were examined.     

Study on The Chemical Constituents from the Essential Oil of Cinnamomum tenuipilis Kosterm

This paper reports chemical constituents of the essential oil from the leaves of Cinnamomum tenuipilis Kosterm. By applying PGC, GC/MS/DS, IR and other methods, 12 components have been identified. These components are: 3-hexen-l-ol, ocimene, L-linalool, geraniol, α-copaene, β-caryophyllene, t-β-farnesene, α-humulene, δ-cadinene, (Z)-β-farnesene, diphenylamine, farneol etc. The total content of the above 12 compounds is 99.94 percent of the essential oil. L- linalool amounts to 97.51%.     

Studies on Abscisic Acid

Epoxidation of methyl dehydro-β-ionylideneacetates with perbenzoic acid afforded methyl 1′, 2′-epoxy-dehydro-β-ionylideneacetates and then methyl 1′, 2′-, 3′, 4′-di-epoxy-dehydro-β-ionylideneacetates. 1′,2′-Epoxy-dehydro-β-ionone, obtained byepoxidation of dehydro-β-ionone, was treated with carbethoxymethylenetriphenlphosphorane to give ethyl 1′, 2′-epoxy-dehydro-β-ionylideneacetates. Further, sensitive photooxidation of ethyl dehydro-β-ionylidenecrotonate, followed by alkaline hydrolysis, gave 1′-hydroxy-4′-keto-α-ionylidenecrotonic acid. Growth inhibitory activities of the above compounds on rice seedlings were examined.     

虫害诱导的水稻挥发物对褐飞虱的驱避作用

水稻叶片在遭受害虫的危害时,释放一些特异性的挥发性物质。这些挥发性信息物质在调节植物、植食性昆虫及其天敌的相互关系中有重要作用。利用“Y”型嗅觉仪研究了褐飞虱对虫害诱导的11种水稻挥发物（浓度为2 Μl 化合物溶解在100 Μl丙酮溶液中）的行为反应。结果表明,(E)-2-己烯醛、(E)-2-己烯-1-醇、-2-庚醇和水杨酸甲酯等4种化合物对褐飞虱成虫有显著的驱避作用,而(Z)-3-己烯-1-醇、-2-庚酮、柠檬烯、罗勒烯、芳樟醇、-β-子丁香烯和橙花叔醇等7种物质对褐飞虱成虫的选择行为无显著影响。浓度梯度的实验表明,浓度(不同体积的待测化合物用100 Μl丙酮稀释)较低的(E)-2-己烯醛（0.5 Μl、1 Μl）和芳樟醇（05 Μl、1 Μl、5 Μl）对褐飞虱成虫的选择行为无显著影响,而较高浓度的(E)-2-己烯醛（5 Μl、10 Μl）和芳樟醇（10 Μl）对褐飞虱成虫均有明显的驱避作用。     

Studies on Abscisic Acid

Oxidation of methvl 2-trans-β-ionylideneacetate with X-bromosuccinimide afforded methyl 2-cis and trans-3′-hydroxy-β-ionylideneacetates. NaBH₄ reduction of methyl 2-cis-3′-keto-β-ionylideneacetate and ethyl 4′-keto-α-ionylideneacetate gave methyl 2-cis-3′-hydroxy-β-ionylideneacetate and ethyl 4′-hydroxy-α-ionyiideneacetate respectively. Further, methyl 4′-methoxy-epoxy-α-ionylideneacetate was prepared by epoxidation of methyl 4′-methoxy-α-ionylideneacetate. And then methyl 4′-hydroxy-l′, 2′-dihydro-β-ionylideneacetate was synthesized from ethyl 4-keto-α-cyclogeranate. Growth inhibitory activities of the above compounds on rich seedlings were examined.     

茶尺蠖绒茧蜂对茶梢挥发物的EAG和行为反应

为筛选有效诱集茶尺蠖绒茧蜂Apanteles sp. 的信息化合物及其组合, 选用了源于健康和虫害茶梢的27种典型挥发物的10-2 g / mL石蜡溶液、混合物1（含等量反-2-己烯醛、顺-3-己烯-1-醇和芳樟醇石蜡溶液）和混合物2（含等量反-2-己烯醛、顺-3-己烯-1-醇、2-戊烯-1-醇、反-2-戊烯醛、顺-3-己烯乙酸酯、正戊醇、正己醇和1-戊烯-3-醇石蜡溶液）, 用1~2日龄雌蜂为试虫, 测试其EAG反应, 并采用Y形嗅觉仪测定其行为反应; 另外, 选择5个茶园进行了野外生测试验。 EAG结果表明: 各味源的EAG值之间差异显著; 脂肪酸衍生物引起较强EAG反应, 其次为芳香化合物和异硫氰酸酯, 再次为倍半萜类和单萜类; 单组分中, 顺-3-己烯乙酸酯、反-2-己烯醛、水杨酸甲酯、反-2-戊烯醛、苯乙酮、苯乙醇、苯甲醇、苯甲醛和茉莉酸甲酯引起的EAG值较大, 1-戊烯-3-醇、2-戊烯-1-醇、顺-3-己烯-1-醇、香叶醇、罗勒烯、α-萜品烯、(+)-雪松醇、(+)-3-蒈烯、α-忽布烯和β-紫罗酮引起的值较小, Z-茉莉酮引起的最小; 混合物1引起的EAG值最大, 混合物2引起的较小. 使用EAG值较大的水杨酸甲酯、反-2-戊烯醛和混合物1等8种味源, 以Y形嗅觉仪进行的行为测定结果与EAG反应基本一致. 以正己烷为溶剂的10^-3, 10^-2和10^-1 g / mL水杨酸甲酯、10^-2 g / mL水杨酸甲酯和反-2-己烯醛混合溶液分别制成诱集剂, 载于橡皮头诱芯, 在浙滇闽粤茶园强烈地诱集茶尺蠖绒茧蜂、单白绵绒茧蜂和其他茧蜂, 并表现梯度效应。据此认为虫害诱发的茶梢互利素引起该蜂强烈EAG反应和趋向性, 互利素与互利素或普通植物挥发物的恰当组合可于茶园中有效诱集该蜂。     

Flavor of Black Tea

Intermediate and high boiling neutral compounds in the aroma concentrate from black tea were isolated by fractional distillation, silica-gel column chromatography and gas chromatography.

Identification of the compounds was verified by the agreement of IR and mass spectra as well as gas chromatographic data with those of authentic compounds.

Eleven compounds; α-muurolene, δ-cadinene, furfuryl alcohol, methyl phenyl carbinol, cadinenol, geranial, pyrrole-2-aldehyde, benzyl formate, phenylethyl formate, cis-3-hexenyl benzoate and indole, were newly identified as constituents of black tea aroma and ten known components; α-terpineol, 3, 7-dimethyl-l, 5, 7-octatrien-3-ol, trans, trans-2, 4-decadienal, 2-phenyl-2-butenal, α- and β-ionone, cis-jasmone, theaspirone, lactone of 2-hydroxy-2, 6, 6-trimethylcyclohexylidene-l-acetic acid and phenylacetonitrile were confirmed. The geometric structure of theaspirone in tea aroma was determined as the cis-form.     

Studies on the conformational state of the chromophore group (11-cis-retinal) in rhodopsin by computer molecular simulation methods

The molecular dynamics of the rhodopsin chromophore (11-cis-retinal) has been followed over a 3-ns path, whereby 3 × 10⁶ discrete conformational states of the molecule were recorded. It is shown that within a short time, 0.3–0.4 ns from the start of simulation, the retinal β-ionone ring rotates about the C6–C7 bond through ～60° relative to the initial configuration, and the whole chromophore becomes twisted. The results of ab initio quantum chemical calculations indicate that for the final conformation of the chromophore center (t = 3 ns) the rhodopsin absorption maximum is shifted by 10 nm toward longer wavelengths as compared with the initial state (t = 0). In other words, the energy of transition of such a system into the excited singlet state S1 upon photon capture will be lower than that for the molecule where the β-ionone ring of the chromophore is coplanar to its polyene chain.     

Electroantennogram responses of a parasitic wasp, Microplitis croceipes, to host-related volatile and anthropogenic compounds

The parasitic wasp Microplitis croceipes (Cresson) (Hymenoptera: Braconidae) showed its own characteristic electroantennogram (EAG) response profiles to 13 host‐related (cis‐3‐hexenol, α‐pinene (R)‐(+)‐limonene (S)‐(–)‐limonene, trans‐β‐ocimene (±)‐linalool, (–)‐trans‐caryophyllene, α‐humulene, nerolidol, trans‐nerolidol, cis‐nerolidol, methyl jasmonate and indole) and four anthropogenic (2‐diisopropylaminoethanol, 2,2′‐thiodiethanol, 2‐methyl‐5‐nitroaniline and cyclohexanone) volatile compounds. These profiles were similar between males and females except for 2‐diisopropylaminoethanol, which elicited significantly larger EAG responses in males. Among the compounds tested, cis‐3‐hexenol, linalool and cyclohexanone elicited the largest EAG responses. EAG responses were not influenced by the age of wasps between 1 and 13 days after emergence. EAG responses were dose‐dependent, and highly EAG‐active compounds elicited significant EAG responses with less than 10 μg of the compounds at source. Quantification of compounds released from an odour cartridge indicates that release rate is highly dependent on the chemical nature of stimuli, showing up to 10 000‐fold differences in the amount released between different compounds when the same amount was loaded in the odour cartridge. Wasps having undergone a behavioural training regime to be attracted to either cyclohexanone or methyl jasmonate did not show any differences in EAG responses from those of untrained wasps.