Potensi Ekstrak Kangkung sebagai Biofungisida untuk Mengendalikan Penyakit Busuk Buah Fusarium pada Tomat

One of the important pathogens on tomato is Fusarium sp . causing wilt and fruit rot. This study aims to investigate the potency of water spinach ( Ipomea aquatica ) as a biofungicide for inhibiting growth and development of tomato fruit rot caused by Fusarium sp . This study showed inhibiting ability of  I. aquatica stem extract to Fusarium sp . growth ranges from 3.40% to 8.67%, while inhibiting ability of leaves extract can reach 3.40% to 45.55%. Resistance induction test showed that in vitro treatment of I. aquatica  leaves extract 20% can lengthen incubation time of Fusarium fruit rot compared to positive and negative control. Leaves extract of I. aquatica 20% is potential as biofungicide. Key words: biofungicide, Fusarium sp ., Ipomea aquatica