Goldenrod Galls
Page Last Updated: January 13 2017
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Goldenrod Ball Gall - produced by Goldenrod (almost
exclusively Canada Goldenrod) in response to the larva
of a
fruit fly (Eurosta solidaginis - Goldenrod Gall Fly) -
Downy woodpeckers prey on the larvae - also known as
Apple Gall
Goldenrod Ball Gall and Gall Fly larva (bottom centre)
Goldenrod Bunch Gall - produced by Canada Goldenrod
in response to the larva of a gall
midge (Rhopalomyia
solidaginis - Goldenrod Gall Midge) - also known as
Rosette Gall
Goldenrod Bunch Gall - a second type of bunch gall
produced by Canada Goldenrod (and other species) in
response to the larva of a
fruit fly (Procecidochares atra)
Goldenrod Bunch Gall
Goldenrod Ball Gall - hole caused by Downy woodpecker
extracting the larva
Goldenrod Elliptical Gall - produced by Goldenrod in
response to the larva of a moth - moths in the families
Tortricidae (Epiblema scudderiana) and Gelechiidae
(
Gnorimoschema gallaesolidaginis) are known to cause
elliptical galls
References
Midge gall - Midge  (Asteromyia carbonifera) lays eggs on
the underside of Goldenrod leaves
Midge gall - Midge  (Asteromyia carbonifera) lays eggs on
the underside of Goldenrod leaves
Goldenrod Ball Gall - diameter approx. 2.5 cm - Kortright Centre for Conservation - July 2009
Goldenrod Ball Gall - diameter approx. 2.5 cm - Lower Don Valley (Crother's Woods) - October 2009
Goldenrod Ball Gall and larva - gall diameter approx. 2.5 cm - larva approx. 5 mm - Samuel Smith Park - September 2010
Goldenrod Bunch Gall with Cow Vetch - approx. 10 cm - Claireville Conservation Area - July 2010
Goldenrod Bunch Gall - approx. 10 cm - Kortright Centre for Conservation - September 2010
Goldenrod Bunch Gall - approx. 4 cm - Lower Don Valley (Crother's Woods) - August 2010
Goldenrod Elliptical Gall - approx. 4 cm - Lower Don Valley (Leaside) - August 2011
Midge gall on Canada Goldenrod - approx. 2 cm - Lower Don Valley (Leaside) - August 2008
Midge gall on Canada Goldenrod - approx. 2 cm - Lower Don Valley (Leaside) - August 2008