Pathological Studies on Lasiodiplodia theobromae the Causal Agent of Gummosis Infected Khaya grandifiolia

The objective of this research was carried out the pathological studies on Lasiodioplodia theobramae the causal agent of gummosis infected African mahogany. The experiment was laid out in a completely randonized design (CRD) with five replicates. The effects of temperature and light and darkness on mycelial growth ofL. theobromae were evaluated. The fungus grew from 20-40oC with optimum growth observed at 25-35oC on potato dextrose agars. On the 10th day, mycelial growth at 25-35oC was (15.6mm ± 0.0 - 30.6mm ± 0.05; 18.4mm ± 0.28 - 32.5mm ± 0.10). There was significant effects of light and darkness on the mycelial difference (P> 0.05) on the growth of L. theobromae. It is recommended from this research work that environmental factor such as temperatures; light/darkness significantly supported the growth of Lasiodioplodia theobramae