Introduction
Sengon is fast growing species which has a high economical value. Now days, sengon is planted not only in timber estate but also in community forest with agroforestry system. Agroforestry system combines tress with crops. However, gall rust disease has caused severe damage to all growth stages. Gall rust is caused by rust fungi, Uromycladium tepperianum. Epidemic of gall rust disease at sengon especially in Java island makes productivity of sengon decrease. It is has influence on cultivation of sengon and developing prospect of product which is based on sengon. Recently, cultivation of sengon increase rapidly but its management has not been optimally. On the other hand, management in community forest is based on needs and habits of the owner. It makes various agroforestry pattern because the principal of agroforestry management is resource sharing to get optimal yield. The different agroforestry pattern with various species composer, especially in community forest which is based on sengon will has influence on development of gall rust disease. Related to gall rust desease, each agroforestry pattern gives different contribution for disease incidence and disease severity of gall rust because of its enviromental factor. Development of gall rust disease is higher in low light intensity, high relative humidity and low temperature [1, 2, 3, 4]. The environment has influence on mode of pathogen dispersal, efficiency of pathogen survival, pathogen reproduction and level of aggresiveness of pathogen. This research was aimed to evaluated development of gall rust disease in various agroforestry pattern.