Insect Galls
Page Last Updated: November 24 2020
Home
Fruit fly (Eurosta solidaginis - Goldenrod Gall Fly) -
Downy woodpeckers prey on the larvae - also known as
Apple Gall
Moths in the families Tortricidae (Epiblema scudderiana)
and Gelechiidae (
Gnorimoschema gallaesolidaginis) are
known to cause elliptical galls
Midge gall on Canada Goldenrod - approx. 2 cm - Lower Don Valley (Leaside) - August 2008
Midge Gall on Wild Grape - approx. 4 cm - York Regional Forest (Hall Tract) - August 2018
Willow Pinecone Gall Midge (Rabdophaga strobiloides)
Midge Gall on Missouri Willow - approx. 4 cm - Don Mills - August 2014
Aphid Gall on Staghorn Sumac - approx. 4 cm - Lower Don Valley (Crother's Woods) - September 2011
Sumac Gall Aphid (Melaphis rhois)
Fruit Fly Gall on Goldenrod - approx. 4 cm - Lower Don Valley (Crother's Woods) - August 2010
Fruit Fly (Urophora cardui)
Midge Gall on Wild Grape - approx. 2 cm - Lower Don Valley (Leaside) - July 2014
Fruit fly (Procecidochares atra) - A second type of bunch
gall
Midge (Rhopalomyia solidaginis) - Goldenrod Bunch Gall -
also known as Rosette Gall
Fruit Fly Gall on Canada Thistle - approx. 3 cm - Lower Don Valley (Crother's Woods) - August 2009
Fruit Fly Gall on Goldenrod - diameter approx. 2.5 cm - Kortright Centre for Conservation - July 2009
Moth Gall on Goldenrod - approx. 4 cm - Lower Don Valley (Leaside) - August 2011
Midge Gall on Goldenrod - approx. 10 cm - Claireville Conservation Area - July 2010
Plant-parasitic Hemipteran (Daktulosphaira vitifoliae)
Plant-parasitic Hemipteran Gall on Wild Grape - approx. 1 cm - Terra Cotta Conservation Area - August 2017
Willow Rosette Gal  on Sandbar Willow - approx. 3 cm - Toronto Islands - September 2020
Willow Rosette Gall Midge (Rabdophaga species)