 The diamondback moth is considered a pest in areas that do not experience very cold winters, as these help to reduce adult activity and kill off overwintering moths.It is considered an especially significant issue in China, as it has been argued that Chinese cabbage represents the country's most significant vegetable crop.The diamondback's lack of natural enemies, such as parasitoids, may be accounted for by the widespread use of insecticides in the 1950s.