Brussel sprouts-pinch out the top or not?

[coreopsis]

As above.
Had a look at the plants,they look nice and sturdy but not much brussels to see.Should I pinch out the tops to encourage the growth of sprouts or it won't help at all?

[jacob marley]

There is no point in pinching out the growing tips on sprouts they will make sprouts soon enough plus some people me included eat the tops as well they are delicious just like spring cabbage so if you can leave them on....jacob

[coreopsis]

Thanks Jacob but the tops are being eaten by bloody caterpillars.Leaves at the top look like the sieve