Over fed my marijuana plant

A question from a fellow grower:

I used to much nutrients on my plant and the leves all wilted and curled allot
Somebody than sprayed insecticide all over the leave structure and no it’s an unhappy plant , any help in to resolve this problem

Wash, flush, and hope.

Be patient. If you do not see new growth flourishing within 2-3 weeks. Cull the dead plant and start over.