(Cross posted in edible plants too)
This year is the first time I have grown calabrese. The plants grew vigorously & produced lovely heads, but when I picked a few, they were heavily infested with well concealed aphids and scale like bugs. I washed them, I left them submerged in water overnight to drown the bugs, but in the end I had to toss them on the compost heap because there were still so many bugs left. I grow organically, and tried derris, but that made no impact. I still have some left in the garden, is there any way to get the bugs off so I can actually harvest some? I haven't tried insecticidal soap yet, because the derris had no effect, would that be worth trying? Does anyone know how to make your own insecticidal soap? (It's expensive to buy here, when you can find it).
Try rhubabrb leaf tea instead.
If you cross post, you'll get half the answers??