štetočina

1. (of insects, animals) pest
   Ove godine štetočine su uništile pola useva. — This year pests destroyed half the crop.
   Prskamo voćke protiv štetočina. — We spray the fruit trees against pests.
2. derog. (of a person) pest; menace
   Taj direktor je prava štetočina za firmu. — That director is a real menace to the company.

It declines like a feminine noun; when it refers to a man, agreement can also be masculine.