Does c02 kill bugs?
The CO2 fumigation method is an effective pest control technique and kills pests at all stages of their cycle (eggs, larvae, and adults). Carbon dioxide treatment is a highly effective way to kill a wide range of insect pests, even those that are traditionally hard to get rid of
1.- Get co2 tank and make your own or Buy dry ice blocks, store in freezer, lasts two days.
Close of area where plants are, place co2 in pan of hot water, close tent or area off, let fog for an hour or so, add more dry ice to keep it foggy on floor, do it everyday for 14 days. Gone
If indoors, use a co2 generator or make your own for indoors or out. outdoors I place one at the base of every plant.