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Dasineura
Photo#1983501
Copyright © 2021
John van der Linden
Gallmaker, Euphorbia -
Dasineura
Quarry Hill Prairie, Winneshiek County, Iowa, USA
June 8, 2021
Blackened shoot tip of flowering spurge,
Euphorbia corollata
, with more than fifty gall midge larvae packed inside
Images of this individual:
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Contributed by
John van der Linden
on 14 June, 2021 - 10:31pm
Last updated 21 February, 2022 - 11:45pm
Moved
Moved from
Unidentified Midge Galls and Immature Stages
.
…
John van der Linden
, 21 February, 2022 - 11:45pm
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Seems like a pretty close match
to the drawing of
Dasineura
sp. near
capitigena
, Figure 137 in Gagné's The Plant-Feeding Gall Midges of North America, p. 92. However, that species is recorded on
Euphorbia esula
only in Gagné's book, and Pemberton and Johnson (1985) note the following:
"
D. capitigena
was studied as a biological control candidate and demonstrated to be host specific to the genus
Euphorbia
by Pasquale Pecora of the USDA's Rome Biological Control of Weeds Laboratory (Pecora 1983). This research allowed us to bring the midge into our quarantine laboratory for testing against 12 representative native
Euphorbia
species. Its predicted host range was found to be similar to that of
Aphthona flava
, in that
it is restricted to subgenus Esula species.
" [emphasis added]
Flowering spurge is not in the subgenus Esula.
===
References:
Euphorbia subgroups | iNaturalist
Pemberton, R.W. and G. Johnson. 1985. Two new insects (Dasineura capitigena and Aphthona flava) for leafy spurge control in United States. 1985 Leafy Spurge Symposium. Bozeman, MT. July 17-18, 1985. pp. 29-32.
Gagné, R.J. 1989. The plant-feeding gall midges of North America. Cornell University Press: Ithaca, New York.
…
John van der Linden
, 14 June, 2021 - 10:51pm
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Gagné weighs in
"These are Dasineura sp. but the galls are not the same as Spurgia capitigena and relatives, besides which E. corollata is a native. Of course, I would need adults to be 100% certain."
--Ray Gagné, via email after examining larvae, autumn 2021
…
John van der Linden
, 21 February, 2022 - 11:44pm
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