Zone de Texte: How important is the environmental damage likely to be in the pest risk analysis area? The environmental damage caused by Crassula helmsii (New Zealand pygmyweed) can be very important in some parts of the EPPO region: its vegetative growth leads to dense mats that outcompete the native flora, it can block ponds and drainage ditches, it impoverishes the ecosystem for invertebrates and fish, plant mats can be dangerous to pets, livestock and children who mistake them for dry land. Zone de Texte: Environmental Damage 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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