Ailanthus altissima (Mill.) Swingle (tree of haven) is an arboreous plant belonging to the Simaroubaceae family. Native to China and North Vietnam, this species has by now spread to all the continents, except Antarctica. It is considered one of the most invasive plants (Weber and Gut, 2004), it can easily grow on different substrates, and it tolerates air pollution, dry conditions and high concentrations of salt and heavy metals (Kowarik and Säumel, 2007; Sladonja et al., 2015). It is a shade-intolerant species; thus, it is difficult for it to grow in mature forests, but it can rapidly exploit a lack of forest canopy to form dense populations. A. altissima can determine important ecosystemic, economic, health and social impacts (Sladonja et al., 2015). The most problematic issue is related to the potential reduction of biodiversity (Motard et al., 2015) in particular in protected areas (Campagnaro et al., 2018). Its fast colonisation is due both to its rapid growth and highly competitive ability, and to the production of allelopathic compounds, such as the quassinoid ailanthone, which has been proven to have herbicidal activity (Demasi et al., 2019). This species also infests meadows, vineyards and olive groves, and it is in particular present in urban areas and disturbed sites, such as roads, railways, field edges and fallow areas (Sladonja