here is one zero cost effective organic pesticide
can be make from papaya leaves.
it's very simple, take 50 grams of
papaya leaves, cut into small pieces.
add the leaves on 500ml of water for 24 hours.
squeeze leaves, dilute with 1-2 liter
of water and spray.
it's
better to test any newly using pesticide or
fertilizer on a single plant, wait for for
1-2 days.
if you are finding any issues, stop 
using it.
