locust
noun /ˈləʊkəst/
  /ˈləʊkəst/
 - a large insect that lives in hot countries and sometimes flies in large groups, destroying all the plants and crops of an area- a swarm of locusts
- The locusts have destroyed a lot of the crops.
 Oxford Collocations Dictionary… of locusts- plague
- swarm
 - descend on
- destroy
 - swarm
 Word OriginMiddle English: via Old French locuste from Latin locusta ‘locust, crustacean’.