Enter the barn at Silva homestead, use the Arktos Pharma terminal, and select "Run Initialization Sequence." Follow and protect the Pharmabot for one minute at three different locations in the nearby crop field to allow JD7E to safely spray the crops. The crop spraying will attract enemies such as stingwings and mole rats. Since the bot is rather fragile (though self-healing between fights), it is advised to stay nearby or draw enemies away from it. Once all three locations are sprayed, the event is completed. Vault Dwellers can linger afterwards to follow Pharmabot JD7E as he returns to the barn, makes an upload transmission of its latest data to Arktos Pharma on the results of its crop spraying, then retreats back inside to shut down and recharge until the event becomes active again.
The Pharmabot is mentioned in a terminal entry at Arktos Pharma.