Extracellular Enzymes of Yam Rot-Causing Pathogens

The range of produceable extracellular enzymes on solid media by the yam rot-causing pathogens was investigated, and the pathogens were found to produce abundant cellulase, polygalacturonase, amylase, and urease. All pathogens, except Botryodiplodia theobromae, also produced abundant lipase. Although all the pathogens produced phosphatase and pectate lyase, the production was low in Botryodiplodia theobromae and Fusarium moniliforme. Only Aspergillus niger did not produce protease or DNase.