Asian knotweeds (Reynoutria japonica, Reynoutria sachalinensis and Reynoutria x bohemica) are invasive exotic plants that were imported from Asia in the 19th century as ornamental and fodder plants.

Their large network of rhizomes and their extraordinarily fast rate of growth, 8cm a day, has enabled them to rapidly clonise numerous environments.

They reproduce mainly by resprouting: if even a single centimeter of stem or root is left, the plant will regrow and easily overrun the entire length of a stream.

In order to fight against these plants which are a threat to biodiversity, it is necessary to uproot them regularly, by hand. This is why we take action every three weeks, from April to October, in the areas we are managing.

This huge job is impossible without the help of volunteers, so all help is welcome!

More info can be found here Stop Knotweed

In order to raise awareness and inform young and old alike, we organise information stalls at various events.

This allows us both to explain what the ASL does, and also to meet the general public, answer their questions, inform and educate them, and encourage them to learn more about the rich biodiversity of Lake Geneva.

If you would like to help us to promote the ASL and the richness of Lake Geneva’s biodiversity, please use the form below to register.

Four times a year we need helping hands to send out more than 8,000 copies of our quarterly magazine.

In a relaxed but hard-working atmosphere, accompanied by coffee and biscuits, these envelope-stuffing sessions are an opportunity to meet people from all walks of life and to share experiences and concerns, or just to chat.

If you would like to help, please fill out the form below.

The ASL is constantly expanding its range of projects and we regularly need help in a variety of areas. Whatever your skills might be – computers, photography, filming, diving, bird identification, or DIY – we’d be grateful to benefit from them !

We would also be happy to talk things over with you to find out how to make the best use of your talents and abilities to further the ever-expanding range of activities of the ASL.

Net’Léman is an action to clean up the shores and the bed of Lake Geneva, based at around twelve to fifteen different sites in Switzerland and France. Each event brings together more than a thousand volunteers of all ages and backgrounds, including nearly 300 certified divers, all united in the effort to preserve the beauty and health of Lake Geneva.

At each session between 5 and 10 tons of waste are collected before being sorted and recycled whenever possible. Banks, ports, landing stages, quays, beaches, the mouths of rivers flowing into the lake and all the locations which are most heavily frequented are gone over with a fine-toothed comb. Waste has no respect for borders!

Would you like to take part in the next Cleanup event? Stay informed by subscribing to our Newsletter.

In “team building” mode with your company, with a class or as a family, we support you in your project.

To do this, please consult our “For groups” page.