The polyphagous invasive brown marmorated stink bug, Halyomorpha halys, reportedly discriminates among phenological stages of host plants. To determine whether olfaction is involved in host plant stage discrimination, we selected (dwarf) sunflower, Helianthus annuus, as a model host plant species. When adult females of a still-air laboratory experiment were offered a choice of four potted sunflowers at distinct phenological stages (vegetative, pre-bloom, bloom, seeding), most females settled onto blooming plants but oviposited evenly on plants of all four stages. In moving-air two-choice olfactometer experiments, we then tested each plant stage versus filtered air and versus one another, for attraction of H. halys females. Blooming sunflowers performed best overall, but no one plant stage was most attractive in all experiments. Capturing and analyzing (by GC–MS) the headspace odorants of each plant stage revealed a marked increase of odorant abundance (e.g., monoterpenes) as plants transitioned from pre-bloom to bloom. Analyzing the headspace odorant blend of blooming sunflower by gas chromatographic-electroantennographic detection (GC-EAD) revealed 13 odorants that consistently elicited responses from female H. halys antennae. An 11-component synthetic blend of these odorants attracted H. halys females in laboratory olfactometer experiments. Furthermore, in field settings, the synthetic blend enhanced the attractiveness of synthetic H. halys pheromone as a trap lure, particularly in spring (April to mid-June). A simpler yet fully effective sunflower semiochemical blend could be developed and coupled with synthetic H. halys aggregation pheromones to improve monitoring efforts or could improve the efficacy of modified attract-and-kill control tactics for H. halys.

据报道，多食性入侵性棕色marmorated 臭虫Halyomorpha halys 可区分寄主植物的物候阶段。为了确定嗅觉是否参与宿主植物阶段的区分，我们选择（矮化）向日葵Helianthus annuus作为模型宿主植物物种。当静止空气实验室实验的成年雌性在不同的物候阶段（营养、开花前、开花、播种）选择四种盆栽向日葵时，大多数雌性定居在开花植物上，但在所有四个阶段的植物上均匀产卵。在移动气二选择区嗅觉实验中，我们然后测试每个工厂阶段与过滤的空气和相对于彼此，为了吸引H.蝮蛇女性。盛开的向日葵总体上表现最好，但在所有实验中，没有一个植物阶段是最吸引人的。捕获和分析（通过 GC-MS）每个植物阶段的顶空气味表明，随着植物从开花前过渡到开花，气味丰度（例如，单萜）显着增加。通过气相色谱-触角电子图检测 (GC-EAD) 分析盛开的向日葵的顶空气味混合物，发现 13 种气味始终引起雌性H. halys触角的反应。在实验室嗅觉计实验中，这些气味剂的 11 组分合成混合物吸引了H. halys雌性。此外，在野外环境中，合成混合物增强了合成H. halys的吸引力信息素作为诱饵，尤其是在春季（4 月至 6 月中旬）。可以开发一种更简单但完全有效的向日葵信息化学混合物，并与合成的H. halys聚集信息素相结合，以改善监测工作，或者可以提高改进的H. halys吸引和杀死控制策略的功效。