noun.
The presence of a large number of pest organisms in an area or field, on the surface of a host or anything that might contact a host, or in the soil.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a swarm of insects that attack plants
noun.
the state of being invaded or overrun by parasites
Word Usage
"This type of infestation is the result of letting people have these things as pets."