depends what you are trying to kill. fire ants are resilient!
meely bugs, aphids, and some types of scale will dye with orange oil.
fleas, ticks, roaches, etc. will more than likely be repelled but not killed.
if the infestation is causing injury to your plants or animals, use the right stuff, just follow the directions. home use pesticides are a negligible source of pollution.
**once a pesticide is applied and dries, it should be safe for your kids. follow the directions, don't put too much.**
[This message has been edited by theJonatron (edited 9/16/2010 8:28p).]