MACROPHOMINA PHASEOLINA IS ONE OF THE MOST IMPORTANT PLANT PATHOGENIC FUNGI SPECIES THAT CAUSES CHARCOAL ROT IN MANY PLANTS. IN SEPTEMBER OF 2009, DURING A STUDY OF EPIDEMICS OF THIS DISEASE IN SOYBEAN FIELDS OF GOLESTAN PROVINCE, SYMPTOMS OF CHARCOAL ROT ON A NUMBER OF WEEDS WAS OBSERVED AND AFTER ISOLATION AND PURIFICATION, THE CAUSAL FUNGUS WAS IDENTIFIED AS MACROPHOMINA PHASEOLINA. THIS WEED SPECIES WERE INCLUDES STINGING NETTLE (URTICA DIOICA), BLACK LACE ELDERBERRY (SAMBUCUS NIGRA), WILD MUSTARD (SINAPIS ARVENSIS) AND CAMELTHORN (ALHAGI MAURORUM). ALL OF FOUR HOSTS ARE INTRODUCED AS NEW HOSTS FOR THIS FUNGUS IN IRAN AND IN THE WORLD.