The healthy leaves of the curry plant (Murraya koenigii) were collected from the garden of medicinal plants, Department of Pharmacy, Rajshahi University, Bangladesh. The fungal strain M12 was subcultured on M2 agar medium and incubated at 25 °C for 3 days. Rice (200 g) and tap water (130 mL) were added into each of 24 P-flasks and then sterilized (121 °C for 15 min). The P-flasks were inoculated with well-grown agar cultures of the strain M12 (pieces 1 × 1 cm) and incubated at 30 °C for 25 days.