Control of aphid, diamondback moth and diamondback moth in water spinach. Aphids can be controlled by spraying 10% batch of insecticide WP 1000 times, or alternately spraying 3000 times of 20% metsulfuron EC or 1000 times of 40% dimethoate EC. 5% Regent suspension 1 500 times, 2.5% Kung Fu EC 3000 times and 2.5% Cypermethrin EC 300 times can alternately control Plutella xylostella and heartworm. Starscream can be sprayed alternately with 52.5% Agrocybe 1000 times, or 2000 times of 20% Pozzolana EC, or 73% Crater EC 1000 times.