The paper describes polyphagous pests, the cabbage moth (Mamestra brassicae) and bright-line brown-eyes moth (Mamestra oleracea), which were not systematically investigated up to now in Slovenia. The cabbage moth, which is more abundant, preferably attacks Brassica plants, and its caterpillars are especially harmful in the cabbage. The paper deals with the morphology, distribution and methods of monitoring the pest populations and discuss on their control. The protection of vegetables from both pests is primarily based on the use of chemical insecticides. However, the use of natural enemies and various agro-technical measures can also be very important in diminishing the populations of the pests. With interlacing of all of these approaches, healthy and quality food can be produced even in the growing seasons with high attack of the pests mentioned.