[Syrphidae] Raising Syrphus larvae

Pavel Láska laskap at seznam.cz
Thu Jul 1 15:50:53 BST 2010

Hi Matt, I was absent some days, so that I am late. The 6 specimens of Syrphus ribesii and 2 spec. of S.vitripennis I reared many time ago. Only one was died before emergence. Larvas development was 12-15days in other 2  23 days (facultative diapause), puparium in all 11-12 days. Individually epruvets of about 10 or later  20 ml coated with cotton was daily provided with aphids. In present season the Uroleucon cichorii on Crepis biennis or Cichorium intibus, or Aphis fabae on Beta (in late spring) without piece of host plant. In the case of inactivity of larvae the were refresh with water on brush directly to larvae. All in room temperature about  22°C. If you wish I could send further  details. The results, including the daily consumptions of aphids was published in less known CzechJournal in 1959. The success is wishing by                     Pavel Láska                                           ----- Original Message ----- 
  From: Perkins, Matthew 
  To: syrphidae at lists.nottingham.ac.uk 
  Sent: Sunday, June 27, 2010 2:28 PM
  Subject: [Syrphidae] Raising Syrphus larvae

  Good afternoon,

  I could do with some advice on my hoverflies! Thanks already for those who have already offered much useful advice on my first PhD experiemnt examining food chain lengths... this email list has proved invaluable.

  I have two new querries though if anyone could help: 

  I am raising Syrphus ribesii larvae and am keeping each larvae individually in small glass / plastic test tubes and provide them with a small leaf and lots of fresh aphids every day. I clean the tubes every day, and use damp cotton wool to plug the ends of the tube. They are kept at 70% humidity, 16:8 hours light: dark.

  1. My larvae are now 6 days old and I need to know if they have any requirements for successful development into pupae - do they require something to stick too or do they need to hang upside down etc. Also should I need to keep them moist throughout their pupae stage? 

  2. I have recently had many (less than 25%) of different age classes turn black and die. It appears on first glance like they have not discharged their gut... but I have no idea. Does anyone recognise these symptoms or could provide advice or keeping more alive?


  Matt Perkins

  PhD Researcher
  Center for Ecology & Conservation
  University of Exeter,
  Cornwall Campus

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