CARROT AND RADISH FLY
We grow our carrots and radishes in the same bed. This year we have had to destroy our radishes as they all had (what I think is) carrot fly. We are now concerned that our carrots will also have this problem. Last year we only grew carrots and they were excellent but the year before they got the carrot fly badly. Does anyone know what causes this and if so why one year good then next year full of fly?