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Unidentified Midge Galls and Immature Stages
Photo#1513214
Copyright © 2018
James Bailey
Bud galls on Galium angustifolium
Whiting Ranch Wilderness Park, Orange County, California, USA
April 26, 2018
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Contributed by
James Bailey
on 26 April, 2018 - 9:47pm
Last updated 29 December, 2019 - 2:36pm
Moved
Moved from
Gall Midges
.
…
John F. Carr
, 29 December, 2019 - 2:36pm
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Moved
Moved from
ID Request
.
My rearing method (which I got from Dr. Gagne) is explained
here
.
…
Charley Eiseman
, 27 April, 2018 - 7:26pm
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Thanks Chaley
I was surprised to see that this morning, all the larvae appeared to evacuate the galls. I'm not sure what the reason is but I've never had this happen with midges or wasps before.
…
James Bailey
, 27 April, 2018 - 7:57pm
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The reason...
is probably just that they're mature and ready to burrow and pupate. Ray might have a better sense of the ratio, but my sense is that the (vast?) majority of gall midges exit their galls as larvae and burrow to pupate, although there are common/large genera that pupate in their galls.
…
Charley Eiseman
, 27 April, 2018 - 8:06pm
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It has been less than 24 hours since collection
I think most of the larvae have exited. Do they complete their larval stage so quickly that this is no coincidence?
This is news to me. I have raised galls on Salvia in the past, and adults emerged from the leaves.
…
James Bailey
, 27 April, 2018 - 8:07pm
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My assumption is that you just had good timing--
I don't recall ever having midge larvae exit galls prematurely (except simple, open, leaf fold type galls that were deteriorating and no longer hospitable), but if you saved a few in alcohol Ray could tell you whether or not they are mature (and if they are, could provide some sort of ID).
…
Charley Eiseman
, 27 April, 2018 - 8:11pm
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Cecidomyiidae
I don't know offhand if this is a known entity, but to rear it you will need to give the larvae soil to burrow into.
…
Charley Eiseman
, 27 April, 2018 - 10:20am
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Dr. Gagne thinks it may be related to Dasineura
Interesting note about soil...
…
James Bailey
, 27 April, 2018 - 6:26pm
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