[Invasive-species] a question about Crassula helmsii, an invasive waterplant species in Western Europe

[Steven Keteleer]

Dear members of this mailing list,

I've been asked to get information about the most effective combats against
Crassula helmsii. This species is now widely scaterred in Flanders and
before that elsewhere in Western Europe.

Is there anyone between you who knows a way to fight this invasive
waterplant effectively?

I should like to know about cases in other countries than Belgium and
Flanders where methods of combats against this species are proven to be
effective and efficiënt.
Particullarly important to us is the effectiveness over the longer term.
Thus, which methods are proven to make this species disappear for a longer
period?
Of course methods without the use of poison are of most interest.

Answers may be send to my private email but may also be shared over this
list.

Kind regards,

Steven Keteleer
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