Figure 5: Pathogenicity test performed with plantlets of D. hamiltonii in test tube to verify Koch’s postulates. a: Sporulating Aspergillus niger and colonization leaf tissue (400× magnification). b: Sporulating Aspergillus fumigatus and colonization of leaf tissue (400× magnification). c: Sporulating Aspergillus flavus and colonization of leaf tissue (400× magnification). d: Leaf rot disease caused by Fusarium proliferatum. e: Colonization marked by leaf rot caused by Fusarium incarnatum with evidence of fruiting bodies. e: Brownto- black leaf lesion disease caused by Cochliobolus lunatus.