Dual culture interactions between the T. viride and the three pathogens of Roselle i.e. P. exigua, F. nygamai and R. solani were studied based on the method of Skidmore and Dickinson [6], Royse and Ries [7]. PDA plate was inoculated with a 5 mm diameter disc of T. viride positioned diametrically opposite to that of the pathogen. Four replications were maintained for each of the pathogens. Monoculture plates of the pathogens and T. viride served as controls. All the plates were incubated at room temperature, and fungal growth was inspected daily for approximate 8e10 consecutive days. The growth of the T. viride and the pathogen colonies were measured at regular intervals after 24 h. The percentage inhibition of pathogen mycelial growth was calculated using the following equation based on Keshvachandran et al. [8] as given below: Percent inhibition of growth ¼ y z y 100 where y ¼ Mycelial growth of pathogen alone (control) (mm), z ¼ Mycelial growth of pathogen along with antagonist (mm).