I've had Capsid bug but they didn't touch the lower leaves, just the brand new growth, didn't look like budheds but more like justonemores. One application of bug clear did exactly what it said on the bottle and no return for 2/3 weeks touch wood.
The damage looks big for capsid and in the wrong place (leaf looks too big to be from the area they munch on but correct me if i'm wrong) but that's just in my case, maybe yours are bigger bugs and i'm only on my 1st grow so a newbie. If the plants are outside could be anything. Either way scotts bug clear does an awesome job with lots of insects so worth a go, just make sure you get the one for fruit and veg.
Here's a pic of what mine looked like.
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