Several earlier reports showed the antifungal and antibacterial effect of Zimmu against various plant pathogens. Satya et al. (2005) demonstrated the antifungal activity of Zimmu leaf extract and snake wood (Strychnos nux-vomica Linn.) against Rhizoctonia solani. Similarly, Muthukumar et al. (2010) reported that the aqueous leaf extract of Zimmu at 10% concentration gave maximum control of black arm of cotton and chili damping-off respectively. Karthikeyan et al. (2007) also reported that the foliar application of Zimmu formulation significantly reduced the incidence of grain mold and also resulted in significant reduction of aflatoxin B1 content in sorghum grains. The antifungal activity of Zimmu might be due phenolic compounds (Satya et al., 2006).