[Syrphidae] need help with the conservation of hoverflies

[Pierre MILLE]

Andrew,

I kill insects by putting them in the freezer after their capture. I do not use ethyl acetate for hoverflies. I've never used cyanide and I never used alcohol at 70 °.

Pierre

 
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Pierre MILLE 
3 avenue des buttes blanches
95220 Herblay - France




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De : Andrew Whittington <awhittington at btopenworld.com>
À : Hoverfly discussion list <syrphidae at lists.nottingham.ac.uk>
Envoyé le : Mer 16 juin 2010, 16h 02min 25s
Objet : Re: [Syrphidae] need help with the conservation of hoverflies

Pierre, 

This depends on several factors.
With what did you kill them? Ethyl acetate tends to leach yellows for example; while cyanide keeps yellows fresh (but few people use cyanide these days). 
The sooner (fresher) you pin the specimens the better.
Or are you dropping them straight into alcohol?

How are you storing them? Do you keep them away from sunlight?

Do you use any pesticides in the cabinet? This may affect colour, but I've no experience of it, since for the most part we steered clear of pesticides, after getting rid of large amounts of naphthalene.


Andrew

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On 16 Jun 2010, at 14:52, Pierre MILLE wrote:

Hello every one,
>
>
>I appeal to the experience of members of this list to see if anyone has a technique to keep the colors of hoverflies. I found that some specimens lose their color when dry. Does anyone has tried acetone? It seems that acetone bath permetra fix the color ? What do you think ?
>
>Best wishes
>
>Pierre
>
>
>
> 
>
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>Pierre MILLE 
>3 avenue des buttes blanches
>95220 Herblay - France
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________________________________

> 
>
>--- En date de : Mar 8.6.10, Bartsch, Hans D <hans.bartsch at telia.com> a écrit :
>
>
>>De: Bartsch, Hans D <hans.bartsch at telia.com>
>>Objet: Re: [Syrphidae] Finding Female Episyrphus
>>À: "Hoverfly discussion list" <syrphidae at lists.nottingham.ac.uk>
>>Date: Mardi 8 juin 2010, 19h53
>>
>>
>>Hello Matt, 
>>In Sweden a favorit plant for females to lay egg on is Phragmites communis. So maybe your are lucky on fresh leaves of such stands and in their vicinity 
>>Best wishes 
>>Hans
>> 
>>----- Original Message ----- 
>>>From: Perkins, Matthew 
>>>To: syrphidae at lists.nottingham.ac.uk 
>>>Sent: Tuesday, June 08, 2010 7:33 PM
>>>Subject: [Syrphidae] Finding Female Episyrphus
>>>
>>>
>>>Hello,
>>> 
>>>Sorry to trouble you, I am trying to catch female Episyrphus balteatus so that I can produce a supply of eggs in the lab. However I am having trouble finding any. I have located and caught plenty of males hovering under trees and bushes in hedgerows and parkland, but an extensive search of hedgrerow flower banks and buttercup fields has revealed no females. I wondered if anyone had  any good tips for finding females  - such as their favourite habitats or food plant species? I have managed to collect many female Syrphus ribesii amongst nettles and flowers in sunny hedge banks...but no Episyrphus.
>>> 
>>>Any help would be greatly appreciated as Im waiting on them to construct food chains in the lab.
>>> 
>>>Kind regards,
>>> 
>>>Matt Perkins
>>> 
>>>PhD Researcher
>>>Center for Ecology & Conservation
>>>The University of Exeter
>>> 
>>> 
>>>
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>>>Internal Virus Database is out of date.
>>>Checked by AVG - www.avg.com 
>>>Version: 9.0.795 / Virus Database: 271.1.1/2810 - Release Date: 04/14/10 08:31:00
>>>
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