The authors recommend to the growers modern maize hybrids (e.g. in FAO 200: Mona SC and Mirna SC, in FAO 300: Carla SC, in FAO 400: Pioneer 3747 SC and in FAO 500: Volga SC etc.) which were MDMV resistant under severe natural infection especially in 1986 and 1987. We are of the opinion, that MDMV is most dangerous for inbred lines, sweet corn and less for maize hybrids. On Tables 2 and 3 there are many inbred lines, which could be source of MDMV resistance. Finally in the paper there are some possibilities to improve the hybrid seed production.