Citizen science and early detection of invasive species: phenology of first occurrences of Halyomorpha halys in Southern Europe

摘要: Early detection of invasive alien species and the ability to track their spread are critical for undertaking appropriate management decisions. Citizen science surveys potentially valuable tools quickly obtaining information on biodiversity distributions. The Asian brown marmorated stink bug, Halyomorpha halys, is an pest agricultural crops a dwelling nuisance. halys was first recorded in Italy 2012 Emilia Romagna, one most important fruit producing regions Europe. To rapidly obtain data its distribution newly invaded area, survey that combined citizen active search set up using multimedia channels. Data concerning when, where how bugs were spotted collected, together with photographs specimens. detected established breeding populations different areas Northern Southern Switzerland, indicating high risk crop damage extends beyond territories detection. Furthermore, new H. phenology, host plants, voltinism behaviour obtained. importance early introduced highlighted. This paper also provides picture-based key recognize from similar pentatomids world.