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<DIV><FONT size=2 face=Arial>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
</FONT>----- Original Message ----- </DIV>
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<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=mjp223@exeter.ac.uk href="mailto:mjp223@exeter.ac.uk">Perkins,
Matthew</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A
title=syrphidae@lists.nottingham.ac.uk
href="mailto:syrphidae@lists.nottingham.ac.uk">syrphidae@lists.nottingham.ac.uk</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Sunday, June 27, 2010 2:28 PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Syrphidae] Raising Syrphus
larvae</DIV>
<DIV><BR></DIV>
<DIV dir=ltr><FONT color=#000000 size=2 face=Tahoma>Good
afternoon,</FONT></DIV>
<DIV dir=ltr><FONT size=2 face=tahoma></FONT> </DIV>
<DIV dir=ltr><FONT size=2 face=tahoma>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.</FONT></DIV>
<DIV dir=ltr> </DIV>
<DIV dir=ltr><FONT size=2 face=Tahoma>I have two new querries though if anyone
could help: </FONT></DIV>
<DIV dir=ltr><FONT size=2 face=Tahoma></FONT> </DIV>
<DIV dir=ltr><FONT size=2 face=Tahoma>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.</FONT></DIV>
<DIV dir=ltr> </DIV>
<DIV dir=ltr><FONT size=2 face=tahoma>1. My larvae are now 6 days old and I
need to know if they have any requirements for successful development
into pupae</FONT> - 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? </DIV>
<DIV dir=ltr><FONT face="times new roman"></FONT> </DIV>
<DIV dir=ltr><FONT face="times new roman">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?</FONT></DIV>
<DIV dir=ltr><FONT face="times new roman"></FONT> </DIV>
<DIV dir=ltr><FONT face="times new roman">Thanks,</FONT></DIV>
<DIV dir=ltr><FONT face="times new roman"></FONT> </DIV>
<DIV dir=ltr><FONT face="times new roman">Matt Perkins</FONT></DIV>
<DIV dir=ltr><FONT face="times new roman"></FONT> </DIV>
<DIV dir=ltr><FONT face="times new roman">PhD Researcher</FONT></DIV>
<DIV dir=ltr><FONT face="times new roman">Center for Ecology &
Conservation</FONT></DIV>
<DIV dir=ltr><FONT face="times new roman">University of Exeter,</FONT></DIV>
<DIV dir=ltr><FONT face="times new roman">Cornwall Campus</FONT></DIV>
<DIV dir=ltr><FONT
face="times new roman"></FONT> </DIV><BR><BR>__________ Informace od ESET
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