50 µL of each fruit or vegetable filtrate as added into 5 mm-hole on starch agar (2.0% agar ad 1% starch , pH7.0 ) and incubated at room temperature for 30 min. Diameters of the clear zone around the hole were measured when iodine solution was presented (Figure 2). Amylase activity in this research is the value of the diameter of the clear zone surrounding the hole (X) minus the diameter of the hole (Y) (Figure 3).