I put Sevin on the fire ants in my raised bed and there is still some dust on the soil. Is it okay to plant my tomatoes there?

There is no "waiting time" for planting vegetables after you have applied Sevin, only for harvesting vegetables.  However, you may want to double check your label and/or check with your local county extension office, as Sevin is no longer cleared for homeowner use on fire ants in many states.  For more information on controlling fire ants, click here.  - Gardening Gal