Figure 1. Chitinase activities of the extracellular protein extracts of Trichoderma in different media over an incubation period of 120 h. A: T. asperellum, B: T. harzianum, C: Trichoderma sp. The activities of the enzyme are denoted in different media as: medium A (-♦-), medium B (-■-), medium C (-▲-), and medium D (-x -). Values are means of four replicates, and error bars represent SE.