Integrating invasive species policies across ornamental horticulture supply-chains to prevent plant invasions

Philip E. Hulme, Giuseppe Brundu, Marta Carboni, Katharina Dehnen-Schmutz, Stefan Dullinger, Regan Early, Franz Essl, Pablo González-Moreno, Quentin J. Groom, Christophe Kueffer, Ingolf Kühn, Noëlie Maurel, Ana Novoa, Jan Pergl, Petr Pyšek, Hanno Seebens, Rob Tanner, Julia M. Touza, Mark van Kleunen, Laura N. H. Verbrugge

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    127 Citations (Scopus)
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    1.Ornamental horticulture is the primary pathway for invasive alien plant introductions. We critically appraise published evidence on the effectiveness of four policy instruments that tackle invasions along the horticulture supply-chain: pre-border import restrictions, post-border bans, industry codes of conduct, and consumer education. 2.Effective pre-border interventions rely on rigorous risk assessment and high industry compliance. Post-border sales bans become progressively less effective when alien species become widespread in a region. 3.A lack of independent performance evaluation and of public disclosure, limits the uptake and effectiveness of voluntary codes of conduct and discourages shifts in consumer preference away from invasive alien species. 4.Policy implications. Closing the plant invasion pathway associated with ornamental horticulture requires government-industry agreements to fund effective pre- and post-border weed-risk assessments that can be subsequently supported by widely adopted, as well as verifiable, industry codes of conduct. This will ensure producers and consumers make informed choices in the face of better targeted public education addressing plant invasions. Publisher Statement: This is the peer reviewed version of the following article: Hulme, PE, Brundu, G, Carboni, M, Dehnen-Schmutz, K, Dullinger, S, Early, R, Essl, F, González-Moreno, P, Groom, QJ, Kueffer, C, Kühn, I, Maurel, N, Novoa, A, Pergl, J, Pyšek, P, Seebens, H, Tanner, R, Touza, JM, van Kleunen, M & Verbrugge, LNH 2017, 'Integrating invasive species policies across ornamental horticulture supply-chains to prevent plant invasions' Journal of Applied Ecology, vol (in press), pp. (in press), which has been published in final form at This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving.
    Original languageEnglish
    Pages (from-to)92-98
    Number of pages7
    JournalJournal of Applied Ecology
    Early online date18 Jul 2017
    Publication statusPublished - Jan 2018


    • biological invasions
    • weed
    • trade
    • non-native
    • legislation
    • nurseries
    • invasive species
    • gardening
    • exotic
    • biosecurity


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