Pesticides sometimes will provide appropriate development and sometimes can't, but choosing right pesticides is the best factor for farming. I always select from the well-known organizations to eliminate any viruses or illnesses.
Private organizations offer better alternatives and they even cure us with good actions.
I myself made neem oil from neem leaves than buying from online or offline stores. We all know everyone are busy in jobs other things so its hard to making anything, but our food is our health protection.
I try to use organic, natural means when possible. Neem, liquid soap, diatomaceous earth. Even simple hand plucking to keep bugs at bay. Some people buy beneficial bugs that would attack the harmful bugs.