study on biological control and systemic induction of peroxidase enzyme activity in tomato plant infected with root-knot nematode (meloidogyne javanica) by pseudomonas fluorescens cha0 antagonist

biological control of root-knot nematode meloidogyne javanica by application of pseudomonas fluorescens cha0 was evaluated under greenhouse condition. results showed that p. fluorescens (109 cfuml-1) as shoot spray significantly reduced in no. of eggmass and egg per individual eggmass as comparison to control. application p. fluorescens as shoot spray induced systemic activation of peroxidase (pox) enzyme in root. in this study, changes of pox activity showed no significantly differences between treated plants at one day after inoculation with nematode and control (nematode treated plant). but it was stimulated significantly after one day and reached to maximum at 5th day after inoculation. so p. fluorescens cha0 can induce plant defense mechanisms such as pox in tomato plant against nematode infection.