What are pesticides and herbicides? Explain giving examples.

(N/A) Pesticides are chemical substances used to destroy or control pests,such as insects,rodents,and fungi,which damage crops or spread diseases. Examples include $Aldrin$ and $Dieldrin$.
Herbicides are chemical substances used to destroy or inhibit the growth of unwanted plants,known as weeds. Examples include $Sodium \ chlorate$ $(NaClO_{3})$ and $Sodium \ arsenite$ $(Na_{3}AsO_{3})$.