DSIR Plant Protection Mt. Albert Research Centre, Private Bag, Auckland, New Zealand.
J Chem Ecol. 1991 Feb;17(2):413-29. doi: 10.1007/BF00994342.
The specific status ofCtenopseustis obliquana pheromone-types I, II, and III has been more fully examined. Females of types I and III produce a mixture of (Z)-8- and (Z)-5-tetradecenyl acetates (Z8-14:Ac, Z5-14: Ac). The previously reported different ratios of these two components in females of the two types (type I=80∶20, III=90∶10) have been reinvestigated. The median ratios of each type differed significantly, although there was some overlap in the ranges of these ratios. A field cage trial showed that males of type III are attracted to females of type I, so the observed differences may be ascribed to intraspecific variation. In contrast to females of types I or III, females of type II produce Z5-14∶Ac but no Z8-14∶Ac. The electroantennogram (EAG) profile of antennae of type II males shows a maximum response to Z5-14∶Ac, while the EAG profiles of types I and III show a strong response to Z8-14∶Ac. In wind tunnel tests using mixtures of these two compounds, type II males prefer blends consisting of all or mostly Z5-14: Ac, while type I males showed a preference to a mix of 70% Z8-14∶Ac plus 30% Z5-14∶Ac. We found that type I males are attracted to type I females when offered a choice between type I and type II females in a field cage test and that type II males similarly prefer type II females. Males of types I and II have specialist cells for Z8-14∶Ac and Z5-14∶Ac but differ with respect to relative densities of these cells and to further cell types responsive to other alkenyl acetates. Type IIC. obliquana is considered therefore a sibling species of types I and III. In addition, the amount of Z5-14∶Ac produced by type II females varied geographically. Females from the North Island produced significantly less (median=1.2 ng) Z5-14∶Ac than females from the South Island (median=2.2 ng). Type II populations in the North Island morphologically resembled sympatric type I, rather than type II from the South Island and are designated as type II (North Island). Type II (North Island) populations have so far been found only at Rukuhia (near Hamilton) and from Kerikeri. In contrast, type II populations are sympatric with type III populations over much of the South Island. In a field cage trial, males of types II and II (North Island) were attracted to females of both II and II (North Island). We tentatively ascribe the differences between type II and type II (North Island) to intraspecific variation.
斜纹夜蛾性信息素型 I、II 和 III 的具体状态已得到更充分的研究。I 型和 III 型的雌性产生（Z）-8-和（Z）-5-十四碳烯乙酸酯（Z8-14：Ac、Z5-14：Ac）的混合物。之前报道的两种类型的雌性中这两种成分的不同比例（I 型=80∶20，III 型=90∶10）已经重新进行了研究。尽管每种类型的比例范围有一些重叠，但中位数比例差异显著。田间笼试验表明，III 型雄蛾被 I 型雌蛾吸引，因此观察到的差异可能归因于种内变异。与 I 型或 III 型的雌性不同，II 型的雌性产生 Z5-14：Ac，但不产生 Z8-14：Ac。II 型雄蛾触角的电触角图（EAG）图谱显示对 Z5-14：Ac 的最大反应，而 I 型和 III 型的 EAG 图谱则对 Z8-14：Ac 显示出强烈的反应。在使用这两种化合物混合物的风洞试验中，II 型雄蛾更喜欢由全部或大部分 Z5-14：Ac 组成的混合物，而 I 型雄蛾则更喜欢由 70%Z8-14∶Ac 和 30%Z5-14∶Ac 组成的混合物。我们发现，在田间笼试验中，当提供 I 型和 II 型雌性供选择时，I 型雄蛾会被 I 型雌性吸引，而 II 型雄蛾也同样更喜欢 II 型雌性。I 型和 II 型的雄蛾具有用于 Z8-14：Ac 和 Z5-14：Ac 的专用细胞，但在这些细胞的相对密度以及对其他烯基乙酸酯有反应的其他细胞类型方面存在差异。因此，斜纹夜蛾 C. obliquana IIIC. 被认为是 I 型和 III 型的姊妹种。此外，II 型雌性产生的 Z5-14：Ac 量在地理上有所不同。北岛的雌性产生的 Z5-14：Ac 明显少于南岛的雌性（中位数=1.2ng）。北岛的 II 型种群在形态上与同域的 I 型相似，而与南岛的 II 型不同，被指定为 II 型（北岛）。II 型（北岛）种群迄今为止仅在汉密尔顿附近的鲁库希亚（Rukuhia）和科里凯利（Kerikeri）发现。相比之下，II 型种群在南岛的大部分地区与 III 型种群共存。在田间笼试验中，II 型和 II 型（北岛）的雄蛾被 II 型和 II 型（北岛）的雌蛾吸引。我们暂将 II 型和 II 型（北岛）之间的差异归因于种内变异。
