Okay 1st thing 1st:
Take all those bag traps and either throw em out or put them a couple of hundred yards away from your garden.
Those bags ATTRACT the beetles with a pheromone (sexual scent). This works very well, but does little to stop the critters from having a snack on their way to what they think is the "Love Shack"
If that does not work:
The use of cheesecloth draped over the plants
will keep some of them away, but if you are in a location that is very windy, this will not really work.
Sevin is labeled for use on veggies and so is Malithion, and chances are if you have ever bought any veggies in the store, including those canned or frozen you have been exposed to either one since they are the 2 most popular insecticides on the market for use on crops.
Personally I prefer using the Sevin dust as it does not have a icky odor, but the Malithion does do a bit better of a job.
As long as either are used correctly according to the labels instructions they are safe. Just be sure to read the "day to harvest" statement on the label, which differs from crop to crop.
Hope this helps!