Biotic interactions among the earthworm, Allolobophora longa, fungus, Fusarium  oxysporum and the root-knot nematode, Meloidogyne javanica infecting eggplant solanum melongena cultivar balady were studied under green house conditions . Multiplying nematode in all trials at the added earthworms was significantly lower than in the control (check). The highest of numbers of galls per root system and rate of nematode reproduction on eggplant were found in treatment nematode of alone, followed by treatment of M. javanica +F.oxysporum .The highest percentages of reductions in length and fresh weight  of shoots and roots occurred on eggplant treated by  M. javanica + F. oxysporum, M. javanica +F. oxysporum +15worms of Allolobophora longa where the values were close. The increase was only in fresh weight shoot with  treatment  F. oxysporum  + 5worms of A. longa while the increase were in both length and fresh weight shoot with treatment 10 worms of  A. longa . The highest percentage value of severity was detected by treatment of nematode + fungus . But, the lowest of severity was found in treatment of F.  oxysporum  +10 worms A. longa.