The brown marmorated stink bug, Halyomorpha halys (Stål) (Hemiptera: Pentatomidae), native to eastern Asia, has become one of the most serious pests of fruit orchards worldwide. This invasive species is highly polyphagous and capable of moving across the agricultural matrix at long distances. However, comprehensive studies exploring how landscape characteristics influence H. halys colonization of orchards are still lacking. Here, we investigated the impact of landscape composition on the trap captures of H. halys in 113 orchards of different fruit tree crops (i.e., apple, pear, peach, walnut and kiwi) in northern Italy. We found that landscapes rich in semi-natural habitats and vineyards and poor in annual crops supported a higher abundance of H. halys juveniles in traps. This pattern became more evident towards the end of the growing season as the abundance of juveniles increased. Adults were instead not affected by the landscape. The invasive stink bug best responded to landscape processes at large spatial scales (3000 m) confirming its high dispersal ability. Moreover, H. halys did not display a strong preference among fruit orchards, although fewer individuals were caught in walnut orchards. Our findings suggest that the habitat composition of agricultural landscapes is a key factor driving the dynamics of this pest in agroecosystems and that semi-natural habitats might be important in supporting H. halys populations and crop colonization. These effects are however limited to juveniles while adult density was similar even in landscapes with very contrasting structures.

棕色褐斑臭虫Halyomorpha halys (Stål)（半翅目：Pentatomidae）原产于东亚，已成为全球果园中最严重的害虫之一。这种入侵物种是高度杂食性的，能够长距离穿越农业基质。然而，仍然缺乏探索景观特征如何影响H. halys果园定植的综合研究。在这里，我们在意大利北部的113 个不同果树作物（即苹果、梨、桃、核桃和猕猴桃）的果园中调查了景观构成对H. halys陷阱捕获的影响。我们发现景观中有丰富的半自然栖息地和葡萄园和一年生作物贫瘠支持了陷阱中H. halys幼鱼的丰度。随着幼鱼数量的增加，这种模式在生长季节结束时变得更加明显。相反，成年人不受景观的影响。侵入性臭虫对大空间尺度（3000 米）的景观过程反应最好，证实了它的高扩散能力。此外， H. halys在果园中没有表现出强烈的偏好，尽管在核桃园中捕获的个体较少。我们的研究结果表明，农业景观的栖息地组成是驱动这种害虫在农业生态系统中动态变化的关键因素，半自然栖息地可能对支持H. halys很重要人口和作物殖民化。然而，这些影响仅限于青少年，而即使在具有非常对比结构的景观中，成人密度也相似。