Laboratory Studies of the Life Cycle of the Carrot Weevil
In laboratory rearing studies on the carrot weevil, Listronotus oregonensis (LeC.), at Urbana, Illinois, during the summers of 1951 and 1952, the average duration of the life cycle from egg to adult in two generations each ranged from 33.5 to 41.1 days. With maximum longevity for adult females of 103 days for the first generation and 428 days for second generation extreme overlapping makes a clear demarcation of the two principal generations difficult.