I've seen advice to drop homegrown broccoli in a pot of salted water for a while so the bugs come out.  What's the right salt:water ratio and how long should I soak? 
Ah... I remember doing this growing up. Usually used a small handful of table salt in a sink full of water, and the worms would be floating on the top after about 5-10 minutes.   Most of the worms.  Sorry I can't give you a more precise ratio; I actually suspect soaking in water does more good than the salt - the worms don't swim.   At least, most of them don't. 