Welcome to gardening, if it's not carrot fly then its cabbage root fly, and if the cabbages get away from that it's the bloody cabbage whites. And if you manage to stop all those the bloody slugs get them. Never ending.
TC
Thats about right what ever I plant if I read up on whats its most prone too thats what I will get and it says don't plant the same family there again for years to come so it won't be long on my two plots I won't be able to plant any thing for years
Saying that even with club root I found this year starting in pots and get a big root ball going then big han