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http://indianaquariumhobbyist.com/community/ :: View topic - Combating Dragonfly Larvae
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Combating Dragonfly Larvae

 
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gokulin
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PostPosted: Fri Dec 22, 2006 12:01 pm Post subject: Combating Dragonfly Larvae Reply with quote

 Hi  Guys,
 
 I  have  an  outdoor  cement  planted  tank  (36  x  12  x  12)  with  livebearers  in  it.  Now,  I  see  lot  of  dragonfly  larvae  in  the  tank  which  I  guess  take  the  fish  fry  as  their  main  source  of  food.......
 
 How  to  combat  these  pest?
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nature_lover
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PostPosted: Fri Dec 22, 2006 1:23 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 I  have  a  lot  of  them  too.  But  I  don't  know  if  you  can  fight  them.  The  only  option  would  be  to  get  rid  of  them  from  the  tank  first  and  then  cover  the  entire  tank  with  a  mosquito  net.
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gokulin
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PostPosted: Fri Dec 22, 2006 2:02 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 Suraj....  I  think  the  only  possibility  may  be  to  use  the  net  to  remove  them  from  the  Tank.....
 
 But  how  Kiran  avoids  these  bugs...  his  cement  tanks  seems  bug  free  of  this  nuisance......
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trevor
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PostPosted: Fri Dec 22, 2006 2:29 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 Ah,  the  benefits  of  an  outside  tank.  Chuckle  Here  are  the  critters.
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gokulin
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PostPosted: Fri Dec 22, 2006 2:35 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 Trevorji.....  tell  me  what  could  be  done.......   Chuckle
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deepesh
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PostPosted: Fri Dec 22, 2006 5:51 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 Hi  Gokul
 
 Dragonfly  larvae  are  of  near  the  top  of  the  pond  food  chain.  The  only  things  that  eat  them  are  bigger  predators.  Which  will  then  make  a  meal  of  not  only  the  dragonfly  larvae  but  also  the  fry!
 
 One  option  that  I  would  try  is  to  cover  the  pond  with  a  mosquito  net  if  feasible,  like  Suraj  has  suggested.  In  the  meanwhile  try  to  catch  as  many  of  the  critters  as  possible  (I  don't  think  you  can  get  all  but  a  good  fraction  netted  out  should  decrease  your  losses).  The  ones  that  get  away  and  become  dragonflies  can  be  let  out  later.
 
 I  dont  know  if  insecticides  are  safe  but  surely  people  with  fisheries  must  be  using  them.
 
 Deepesh
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gokulin
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PostPosted: Fri Dec 22, 2006 6:10 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 I  can  understand....  I  am  trying  to  find  out  if  there  is  any  other  better  approach  than  closing  the  tank....
 
 Ofcourse,  I  am  gonna  net  out  as  many  of  the  critters  I  can.......
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nature_lover
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PostPosted: Fri Dec 22, 2006 6:13 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 Really  tough  to  manage  it,  Gokul.  They  are  fast  and  quiet  well   camouflaged  in  a  large  tank  as  mine.  I  have  let  them  be.
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gokulin
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PostPosted: Fri Dec 22, 2006 6:16 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 How  is  Kiran's  tanks  free  of  these  critters??   Surprised
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nature_lover
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PostPosted: Fri Dec 22, 2006 6:41 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 No  darn  idea  !!
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sandeepraghuvanshi
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PostPosted: Fri Dec 22, 2006 6:50 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 I  let  them  be  in  my  tank  Very Happy  
 Earlier  I   was  not  able  to  recognize  them  but  trevor's  picture  has  helped.
 I  have  a  regular  supply  of  fry  in  the  tank,  many  of  them  are  growing  to  their  full  size,  so  something  must  be  taking  care  of  itself.
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nature_lover
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PostPosted: Fri Dec 22, 2006 7:04 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 Same  here,  Sandeep.  I  have  always  found  a  few  of  them  in  my  tank,  but  still  I  have  fries  that  have  grown  and  doing  well.  So  I  guess,  they  are  more  of  a  nuisance  than  causing  major  damage.
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rasikanayak
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PostPosted: Fri Dec 22, 2006 7:08 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 Hi,
 
 We  also  have  the  same  pest  problem  in  Bangalore.
 
 Covering  the  tank  with  net  will  not  work.  I  have  tried  it  and  once  found  a  dragonfly  flying  inside  the  net  after  moulting.  The  dragonflies  do  not  lay  the  eggs  like  mosquitoes  by  sitting  on  the  surface  of  the  water.  They  fly  over  the  water  and  bombard  their  fertilised  eggs  into  it.  So  a  porous  net  is  a  waste.
 But  the  funny  thing,
 I  have  four  plastic  tubs  outside.  colors-  white,  pink  faded  to  white,  orange  faded  to  white  and  a  dark  blue  one.  I  have  the  dragonfly  menace  in  all  the  tubs  except  the  dark  blue  one.  Not  one  dragonfly  larve  ever  in  the  dark  blue  one  and  no  predatory  fishes  either.  Solve  this  one  out  and  get  a  doctorate  Chuckle  Â Chuckle  
 
 Nayak.


Last edited by rasikanayak on Fri Dec 22, 2006 8:09 pm; edited 1 time in total
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nature_lover
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PostPosted: Fri Dec 22, 2006 7:17 pm Post subject: Re: Combating Dragonfly Larvae Reply with quote

 I  have  never  had  problems  in  my  tubs,  though  most  are  blue   Very Happy  and  I  don't  have  problems  in  my  glass  tanks  either  though  all  of  them  are  at  the  same  place  !!  
 
 Funny  thing  is  I  don't  have  a  single  tank  indoors!!!   Surprised   I  must  start  soon.
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