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?
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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.