RESISTANCE IN COMMON BEAN(PHASEOLUS VULGARIS L.) TO UROMYCES APPENDICULATUS IN BULGARIA

Common bean rust, caused by Uromycesappendiculatus, is one of the most devastating diseases in common bean. Breeding for resistant cultivars effective and eco-friendly method disease control. Although there no targeted breeding program Bulgaria to create pathogen, periodic screening virulent diversity U. appendiculatus sources resistance identified races/pathotypes carried out. During last twenty years, four investigations were made estimate virulence pathogen population. Eleven races (20-0, 20-1, 20-2, 20-3, 20-19, 29-0, 29-1, 28-1, 52-3, 20-16 20-18) are identified, distributed Rhodope mountains North Bulgaria. Chronologically each studies was accompanied or followed a under field conditions. Еach study found different numbers accessions depending on potential population used. In three studies, that showed phenotype conditions screened against set races, country same time, greenhouse. Bulgarian cultivar ‘Beslet’ reaction greenhouse all investigation. The 20-1 20-19 governed single dominant gene. This can be successfully used race-specific resistance. Fifty with race-nonspecific resistance, expressed low intensity resistant/susceptible infection type, two