Bulb fly question

David Fenwick Snr. davidfenwicksnr@googlemail.com
Tue, 27 Apr 2010 11:19:53 PDT
Hi Nhu,
There are probably two species to consider for reporting the distribution; 
both are syrphids (hoverflies); both are pests of Amaryllids.

Merodon equestris - Large Bulb / Narcissus Fly
http://aphotofauna.com/hoverfly_merodon_equestris_…
There are also about six different vars. (colour forms of Merodon 
equestris), just to confuse people.

Eumerus tuberculatus - Small / Lesser Bulb / Narcissus Fly
http://www.bioimages.org.uk/html/p4/p44393.php

Another hoverfly to report which may cause a problem with alliaceae is the 
Marmalade Fly, Episyrphus balteatus; this species is generally accepted as a 
beneficial insect as it's an aphd preditor; however I've noticed that it 
prefers to lay its eggs on Tulbagia when there is no reason for it to do so. 
It would be interesting if anyone else is aware of this or knows of this 
species being a pest. 
http://aphotofauna.com/hoverfly_episyrphus_balteat…

Nhu, if you wanted to use the images from the aphotofauna sites above on the 
wiki, help yourself. I'm sure I've probably got images of Eumerus 
tuberculatus as well.

Best Wishes,
Dave

David Fenwick
3 Post Office Terrace,
Nanpean,
Nr. St. Austell,
Cornwall.
PL26 7YF
Tel: 01726 824714

APHOTO WILDLIFE IMAGE LIBRARIES
http://www.a-p-h-o-t-o.com/ 


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