Root - knot nematode (Meloidogyneincognita) is the dangerous disease caused significant effects on eggplant growth and yield. This study was conducted at Bazian, Sulaimani Governorate, Kurdistan Region, Iraq to estimate the population densities and their control, using different methods and with effects on vegetative growth and floral characteristics of the eggplants. An experiment was laid down in a simple randomized complete block design (RCBD) including 9 treatments with three replicates. The results showed that the reproduction factor (RF) of the nematodes in the Nemakey 0.75 ml m^-2 and Charge (Humic acid %15) treatments were 0.00 and 0.50 respectively. Reduction of the juveniles 2 were 100.0 and 81.9%, respectively, so they are considered to be the two best treatments for decreasing the population densities of the nematodes. The highest plant height was 118.7cm recorded in the Nemakey 0.75 ml m^-2 treatment, while the Charge gave the largest no. of Leaves/plant (712.7), in the same treatment, the highest amount of chlorophyll was 48.67 mg g^-1 , with the shoot weight/plant (3350 g). However, there were no effects of the all of the treatments on the percentage of leaf dry matter. The largest root length was recorded for the Nemakey 0.75 ml m^-2 (50.33 cm) and the root weight was 1066.7g for the Nemakey 1 ml m^-2 .There were no significant effects of any of the treatments on the total flowers/plant and few effects were observed on the aborted and setting flower/plant, also no. of the days needed for flowering. Charge obtained the highest no. of fruit /plant and the % of Brix of the fruits, while the Nemakey 2 ml m^-2 had significant effects on fruit weight (g), yield (kg/plant).The percentage of increased yield (102.58 , 10.60 and 48.04) respectively, compared with the control.