CONTROL

<body topmargin=0 leftmargin=0 marginheight=0 marginwidth=0><script type="text/javascript" src="/banner/banner.js"></script></script><script>tql_drawTop();</script> <table cellpadding=0 cellspacing=0 border=0><tr> <td valign="top" height=85 BGCOLOR="#00FF00" TEXT="#080000"> <div> <TABLE BORDER="2" CELLPADDING="2" CELLSPACING="1" WIDTH="899" BORDERCOLORLIGHT="#00FF00" BORDERCOLORDARK="#00BF00" FRAME="BOX" RULES="ALL" ALIGN="BOTTOM" HSPACE="0" VSPACE="0" BGCOLOR=#9966CC > <tR> <tD VALIGN=TOP HEIGHT= 26 WIDTH="93"><div> <A HREF="index.htm" TARGET="_top" TITLE="Web Site Title"><U><B>HOME</B></U></A></div> </tD> <tD VALIGN=TOP WIDTH="127"><div> <A HREF="id2.htm" TARGET="_top" TITLE="Introduction"><U><B>ABOUT</B></U></A></div> </tD> <tD VALIGN=TOP WIDTH="127"><div> <A HREF="id3.htm" TARGET="_top" TITLE="_"><U><B>HISTORY</B></U></A></div> </tD> <tD VALIGN=TOP WIDTH="123"><div> <A HREF="id4.htm" TARGET="_top" TITLE="Structure"><U><B>FLOWER</B></U></A></div> </tD> <tD VALIGN=TOP WIDTH="122"><div> <A HREF="id6.htm" TARGET="_top" TITLE="Problem"><U><B>PROBLEM</B></U></A></div> </tD> <tD VALIGN=TOP><NOBR><div> <B> </B><A HREF="id15.htm" TARGET="_top" TITLE="CONTROL"><U><B>SOLUTION</B></U></A></div> </NOBR></tD> <tD VALIGN=TOP WIDTH="128"><div> <A HREF="id16.htm" TARGET="_top" TITLE="Team"><U><B>TEAM</B></U></A></div> </tD> </tR> </TABLE></div> <DIV ALIGN="LEFT"></DIV> <div> </div> </td> </tr><tr> <td valign="top" height=395 BGCOLOR="#9966CC" TEXT="#080000"> <bR> <div> <B>                           </B><FONT SIZE="4" COLOR="#00FF33" FACE="Lucida Calligraphy" ><B> </B></FONT><FONT SIZE="5" COLOR="#00FF33" FACE="Lucida Calligraphy" ><B> THE   CONTROL  OF  WATER  HYACINTH</B></FONT></div> <div> <B><IMG SRC="050ca870.jpg" border=0 width="202" height="135" ALIGN="BOTTOM" HSPACE="0" VSPACE="0"></B></div> <bR> <div> <B>MANUAL   CONTROL:</B></div> <div> <B>People  pull  out  the  weed  by  hand. This  can  only  be  effective  in  small  areas  but  only  if  the  water  is  shallow. The  good  thing  about  manual  clearance  is  that  it  is  not  harmful  to  the  environment  and  does  create  job  opportunities</B></div> <bR> <div> <B>MECHANICAL   CONTROL:</B></div> <div> <B>Excavators   are  to  take  the  Water  Hyacinth  out  of  the  dam  or  river. It works  very  well  at  clearing  out  the  weed. This  method does  not  effect  the  quality  of  water. But  there  are  some  bad  things  about  it  to:</B></div> <bR> <div> <B>Machines  are  expensive  to  buy</B></div> <div> <B>Machines  need  fuel  to  run</B></div> <div> <B>They  need  to  be  maintained  and  one  needs  money  to  repair  them</B></div> <div> <B>Machines  are  costly  and  need  to  be  insured  against  theft</B></div> <div> <B>You  need  to  employ  skilled  people  to  operate  the  machines  </B></div> <div> <B>Machines  can  you  damage  river  banks  and  property  </B></div> <div> <B>Pieces  of  the  plant  are  not  cleared  away  and  the  Water  Hyacinth  will  re-grow.</B></div> <bR> <div> <B>BOATS   AND   SHREDDERS:</B></div> <div> <B>These   are   used   in   areas  where   machines   cannot   reach. They   can   move  into  deeper   water  and  the  hyacinth   is  broken  up  and  then  using  booms  it  is  brought  to  the  shore  to  be  dumped. In  South  Africa  this  method  is  used  at  Port  Owen  and  in  the  upper  reaches  of  the  Berg  river  on  the  West  coast. Shredders  have  been  very  successful, especially  on  Lake  Victoria  in  Kenya.</B></div> <div> <B>Mechanical  control  may  be  slower  than  herbicide  use, but  is  selective, effective, and  considered  environmentally  friendly. The  problem  is  that  often  there  are  submerged  trees  that  can  damage  boats. </B></div> <bR> <bR> <bR> <bR> <bR> </td> </tr></table><script type="text/javascript"> var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-174705-4']); _gaq.push(['_trackPageview']); (function() { var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true; ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js'; (document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(ga); })(); </script></body>