Dynamics of Gall Rust Disease on Sengon (Falcataria Moluccana) in various Agroforestry Patterns

Sengon (Falcataria moluccana) has a high economical value in the community forest. It was planted by agroforestry system that has various pattern. However, gall rust disease has caused severe damage to all growth stages. Each agroforestry pattern has a different contribution on the development of gall rust disease. This research was aimed to evaluate development of gall rust disease in various agroforestry pattern. Field study was made in various agroforestry pattern that are PA I (sengon with coffee, papaya, and ginger), PA II (cassava planted between sengon with 1, 5 m spacing) and PA III (cassava planted in the edge of sengon plantation with 0, 5 m spacing) to observe Disease Incidence (DI) and Disease Severity (DS). The result showed that development of gall rust disease for 5 months at agroforestry patterns were observed is low (PA I has DI = 47,22%, DS = 15,74% while PA II has DI = 27,16%, DS = 10,29 and PA III has DI = 20,99%, DS = 7,41%).