What is pest and pesticide?

Pest and pesticide .What is a pesticide? can you List  specific examples and what type of organism they each kill. What is a pest? and List a few specific examples.

Pests are organisms that occur where they are not wanted or that cause damage to crops or humans or other animals. Thus, the term “pest” is a highly subjective term. A pesticide is a term for any substance intended for preventing, destroying, repelling, or mitigating any pest.