From the investigation, it was observed that leaf extract of Piper betel in ethanol and acetone at 20% concentrations
effectively suppressed the mycelial growth of the F. oxysporum. Inhibition observed by P. betel may be
due to the presence of the essential oils which contained phenolic compounds [16] [17]. There have been reports
on the antifungal activities of P. betle [18]. Singha et al. [11] reported the control of fusarium wilt of tomato
caused by Fusarium oxysporum using chloroform extract of P. betle leaf. They observed that it was efficient in
reducing Fusarium population in soil than carbendazim. These facts suggested that betel leaf extracts exhibit
significant fungicidal properties that inhibit the mycelia growth of Fusarium strain.