Damping-off disease of pea is one of the most dangerous diseases most dangerous diseases attacking pea plants. It reduces the plants. It reduces the number of grown plants and significantly decreases the pod yield. Pea plants can be protected from this disease chemically, biologically and by using certain doses of micro or macronutrients. In this work, zinc, calcium and manganese were used and applied at different doses to pea plants in field experiments. In this research work, different microelements were used at four concentrations, i.e. 1, 2, 3 and 4 g for each treatment. The effect of the different microelements was compared to the effect of Rhizolex-T50 under laboratory condition where the effect of different treatments on the fungal linear growth was tested. Under field conditions, the three elements were tested and showed significant effect on disease incidence during two seasons 2010/11–2011/12, zinc gave 85.57% and 87.79% survival plants, respectively, in comparison with the control treatment 78.00% and 12.34%, respectively, while manganese gave 82.12% and 83.35% and calcium gave 84.23% and 86.66%, respectively, in comparison with the control treatment. On the other hand yield components, i.e. mean number of pods / plant, average weight of green pods and yield/plot (kg) were also determined and recorded significant increase.