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Gallmaker:
Lasioptera solidaginis
Tree type:
Solidago sp.
Illustration of Lasioptera solidaginis "Knotty goldenrod gall".

Gall maker: Lasioptera solidaginis, a gall midge (Order Diptera, Family Cecidomyiidae).

Shape and Size: Called the "knotty goldenrod gall." May be roughly spherical to fusiform, with "eccentric" bulges.

Location: On stems of goldenrod (Solidago sp.) plants, summer. Approx. 3 cm in length.

Color: Color is the same as the overall stem structure.

Source: Felt, P. E. Plant Galls and Gall Makers.
Jodhpur, India: Agrobios, 2001.
p 320 (Fig. 310), 321.