Translation of "Pest" in Japanese

Get off me you little pest!

ベタベタするんじゃねえよっ！鬱陶しい！

It's a natural form of pest control,

天然の害虫駆除です

What I suspect is the orangutan is being hunted as an agricultural pest,

だがオランウータンは 農業害獣として駆除される

Dammit, that pest Nagisa, she really went and snitched on me to the teachers.

くそー、渚のやつ、本当に先生にチクりやがった。

He's the pest that, on last month's class-help day, escaped leaving me with all the work.

先月の日直当番全部私に押し付けた形でエスケープした野郎だ。