Show carrot pest the carrot rust ny fly Is probably responsible for wormy carrots but un fortunately no practicable control measure Is known on the other land hand the pest Is periodic and may cause little or no damage another year the larvae or vorra norm or of the carrot rust fly are pale straw col ored about 3 10 of an inch long the first brood burrows through the roots in midsummer leaving brownish rusty colored burrows often the carrots decay A second brood may enter the roots and appear in storage |