Back to profile Contact person for... - CJ (Chris) van Dijk Dossier Hogweed - How to control and remove it Giant hogweed (Heracleum mantegazzianum) can become an incredible nuisance. This plant displaces native plant varieties and the plant sap contains... Exotic species in the Netherlands Exotic species, also known as alien or introduced species, are animals, plants, fungi or micro-organisms imported through human activity into an area... Pages 10 questions on biomonitoring - plants that measure air quality Biomonitoring is the use of plants to measure air quality. Plants can absorb and store substances from the air. After harvesting, these can be... Invasive plant species Invasive plant species are species that do not naturally occur in the Netherlands. These exotics are usually brought into the country by human... SWEEP Work on the development of a sustainable weed management system for pavements (SWEEP) has been conducted since 2002. Extensive field tests have shown... SWEEP - Sustainable Weed control on Pavements Weed control on pavements requires much attention. Strong weed development between paving stones has negative effects on functionality, safety and... Contact SWEEP For more information about the SWEEP system, please contact SWEEP. News Heating soil successful in combating Japanese knotweed 18 februari 2020 | Japanese knotweed (Fallopia japonica) is an invasive exotic plant, whose strong roots and stems cause significant damage. Hitherto, there were no...