Can anyone give me some tips on how to grow a better crop of swedes. Am only doing it on a small scale about 1 1/2 acres. Using treated ruta otofte seed through a Webb precision seeder onto ploughed and rotavated ground onto drills. Applied boronated fertilizer. The crop was poor this year a lot of small ones and a lot that had small worms like maggots that rot out the cores. How can I prevent these beasties? any tips on how to get a larger crop. I don't use any pesticides