An electrostatic crop spraying system is used to apply pesticide to the leaves of crop plants.
The pesticide droplets receive a positive charge as they leave the spray nozzle. The grounded plants develop an induced negative charge on their surfaces as the charged droplets approach.
Explain how charging the pesticide droplets and the induction of charge on the leaves help to ensure that the pesticide spreads out and covers both the top and the underside of the leaves.
You should use ideas of forces and fields in your answer.