Gall-inducing insect Gall-inducing insect A gall-inducing insect is any insect that can cause the growth of galls within plants. The term gall fly is also used to cover these species, although most are not true flies. There are several groups of insects that meet this description. They include the gall wasps, scales, gall midges, aphids, psyllids and certain species of leafminer flies. Galls are growth deformities induced in certain plants by various insects which are mostly species-specific. The gall's form or type depends on what organism is attacking the plant and where the plant is being attacked. Based on the form, there
Blue Velvet (film) Symbolism is used heavily in "Blue Velvet." The most consistent symbolism in the film is an insect motif introduced at the end of the first scene, when the camera zooms in on a well-kept suburban lawn until it unearths a swarming underground nest of disgusting bugs. This is generally recognized as a metaphor for the seedy underworld that Jeffrey will soon discover under the surface of his own suburban, Reaganesque paradise. The severed ear he finds is being overrun by black ants. The bug motif is recurrent throughout the film, most notably in the bug-like gas mask that Frank wears,