Natural bug control for garden??

Ive tried garlic spray and hot pepper sauce..that seems to b eonly seasoning the salad for the critters!! There's a rat snake, cat san dhawks that are getting th emice..and some of th erabbits but the bugs!!! We have a couple of preying mantids but not enough to do the job..

and why do slugs like tomatoes???

Any no pesticide ideas???

A 1 megaton nuke should do the job nicely.