Zone de Texte: Applicability of the PRA scheme to pest plants is new Zone de Texte: Differences in the assessment of plants as pests: invasive plants have effects on the environment, impacts are generally described in qualitative rather than in economic terms unintentional introduction: seeds or other propagules contaminating imported commodities intentional introduction: plants for agricultural or horticultural purposes from a traditional pest, you know before that it is able to cause damage. From a plant you often do not Zone de Texte: Gritta Schrader October 2004 Zone de Texte: Federal Biological Research Center for Agriculture and Forestry Department for Plant Health, Braunschweig, Germany

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