The Heavens' Strongest Pesticide System

Pesticides are pesticides, but whether this is a proper story, I couldn't say... With no clear future ahead, he had planned to live a quiet, ordinary life until the unexpected gift of a golden medicine bottle changed everything. His soul transmigrates to a fantasy world, unlocking the strongest Pesticide System! With improved 21st-century chemical pesticides, he takes on the sciences of the Profound Realm! You have sheep that eat grass; I have Paraquat. You have oxen to plow fields; I have a tractor... From then on, he levels up by guzzling potions, plants grass on the spot, and spirals straight into the sky!