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?
The only number I've ever heard was 4-6 teaspoons of salt per gallon of water, but that's just something a friend told me, they might've made it up. I've never actually seen any bugs on broccoli - organic or otherwise - so when I wash it I usually just shake in about 1/2 tsp into the bowl.
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.
It doesn't matter. Salt is cheap, throw a good handful in. Broccoli won't absorb salt, so any brine will remain on the surface. Just rinse it off.
I've found the same with eggplant -- it's impossible to oversalt if you rinse it off.
1 tsp to 1 quart water for five minutes. Do not over-salt as the bugs just roll into balls and don't come out at all. But if you salt lightly, they are lightly irritated and float to the surface.