Abstract
Effects of Meloidogyne incognita and Macrophomina phaseolinaon root-rot of two cultivars of French bean were examined in a greenhouse experiment. Severity of Macrophomina root-rot increased by 54.5, 94.6, and 9.6% when both pathogens were introduced simultaneously. Nematode infection and reproduction was adversely affected when the fungus was introduced first. Cultivar "Harvester" was more tolerant to both pathogens and less susceptible to the nematode than "Romano Italian".