Preventing horticultural introductions of invasive plants: potential efficacy of voluntary initiatives |
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Authors: | Jennifer W Burt Adrianna A Muir Jonah Piovia-Scott Kari E Veblen Andy L Chang Judah D Grossman Heidi W Weiskel |
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Institution: | (1) Department of Plant Sciences, University of California, Mail Stop 1, One Shields Avenue, Davis, CA 95616, USA;(2) Section of Evolution and Ecology, University of California, One Shields Avenue, Davis, CA 95616, USA;(3) Department of Environmental Science and Policy, University of California, One Shields Avenue, Davis, CA 95616, USA |
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Abstract: | Although prevention is the most cost-effective way to avoid the enormous expenses associated with plant invasions, invasive
plants continue to be imported as trade commodities for horticultural use. With very little government regulation of horticultural
imports of invasive plants, efforts have turned toward fostering voluntary initiatives to encourage self-regulation by the
horticulture trade. Our study takes the first step toward evaluating the potential success of these voluntary initiatives.
We conducted a survey of nursery professionals to gauge their perceptions of invasive species, the role of the horticulture
trade in invasive plant introductions, and their participation—potential and actual—in preventive measures outlined in the
St Louis Voluntary Codes of Conduct for nursery professionals. We found nursery professionals to be highly aware of invasive
plants and to accept responsibility as a trade for horticultural introductions. Although only 7% of respondents had heard
of the St Louis Voluntary Codes of Conduct, the majority (57%) reported having participated in at least two of seven preventive
measures, and most (78%) reported willingness to engage in the majority of preventive measures. We found that several factors
significantly predict increased participation in preventive measures, particularly awareness of invasive plants and involvement
in trade associations. We also identified incentives and obstacles to participating in preventive behaviors, including “concern
for the environment” and “lack of information,” respectively. Our results suggest that participation in voluntary initiatives
will improve through increased outreach, and we provide specific recommendations for improving participation in voluntary
programs in the horticulture trade. |
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Keywords: | Horticulture Invasive species Non-mandatory programs Nursery Prevention St Louis Declaration Self-regulation Survey Voluntary codes of conduct |
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