Hi Gerry, in my flower garden i have planted a dozen broccolli plants which are growing well, but this morning i have discovered at least 50 to 60 caterpillars working their way through the leaves.I’ve been trying to develope a wildlife garden and bring in insects,but i don’t want to lose the broccolli either,will leaving them affect the growth of the broccolli or should i get rid of them. Yours, Philip Mullen