An effort to overcome losses from leaf rust disease that has been done is through crop rotation, the use of pesticides, and planting resistant varieties. Suprapto (1992) suggested that the use of resistant varieties can reduce yield losses due to soybean rust pathogen attack. The use of resistant varieties is a best method, because it is more economical and not the Result environmental pollution. Soybean is an important crop because of its role as a source of vegetable protein and can be used as industrial raw materials. In Indonesia the result is still low so every year need to import large enough to meet national demand (Karamoy, 2009). The low productivity of soybean and high production costs caused soybean production in the country is still very difficult to keep pace with the increasing demands, but by looking at the potential production is still possible to be improved. Leaf rust disease caused by P. pachyrhizi often affects soybean plants is one of the causes of low production.