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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Dear Steven,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>It is my belief that in the UK no method has been found to control this species successfully; even in the most successful cases, control of C. helmsii has required the eradication of all plants in a wetland.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>I would be very interested to hear of successful control.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Best wishes<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Richard<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#1F497D'>-------------------------------------------------------<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#17365D'>Richard Lansdown<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#17365D'>Chair IUCN/SSC Freshwater Plant Specialist Group<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#17365D'>Ardeola Environmental Services<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#17365D'>45 The Bridle<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#17365D'>Stroud<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#17365D'>Glos. GL5 4SQ<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#17365D'>Tel: 01453 763348<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:10.0pt;color:#17365D'>Mob: 07802196494<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> invasive-species-bounces@biodiversity.be [mailto:invasive-species-bounces@biodiversity.be] <b>On Behalf Of </b>Steven Keteleer<br><b>Sent:</b> 16 October 2012 22:33<br><b>To:</b> invasieve soorten mailinglijst; invasive-species-owner@biodiversity.be<br><b>Subject:</b> [Invasive-species] a question about Crassula helmsii, an invasive waterplant species in Western Europe<o:p></o:p></span></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Dear members of this mailing list,<o:p></o:p></p><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Is there anyone between you who knows a way to fight this invasive waterplant effectively?<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>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.<o:p></o:p></p></div><div><p class=MsoNormal>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?<o:p></o:p></p></div><div><p class=MsoNormal>Of course methods without the use of poison are of most interest. <o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Answers may be send to my private email but may also be shared over this list.<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Kind regards,<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p></div><div><p class=MsoNormal>Steven Keteleer<o:p></o:p></p></div><div><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal> <o:p></o:p></p></div></div></div></body></html>