English to English

noun (n)

• the state of being invaded or overrun by parasites(noun.state)

  source: wordnet30
• a swarm of insects that attack plants(noun.group)

  Synonym:
  plague
  

  source: wordnet30
• The act of infesting or state of being infested; molestation; vexation; annoyance.(noun)

  source: webster1913