Pyrethrins. You can spray the plants lightly,but do it in the dark with a 1 foot distance and fast sweeping. Should not take long. Spray air intake system/piping too. Direct contact with the bugs is recommended.
If they get out of control they will weaken the plant to death. In a bad infestation but recovery,the growth will be stunted.
I used to use Bug Stop but they changed the ingredients. Terro brand Ant Killer has the natural and the synthetic that does not break down as fast.
Bright light will break this product down.