The root dip of rice seedlings in the culture filtrate of Trichoderma harzianum and Gliocladium virens for different durations and concentrations had significant effect on penetration ability of Meloidogyne graminicola. Increase in culture filtrate concentrations as well as root dip duration revealed enhancement in inhibitory effect on nematode penetration of rice root. Lowest filtrate concentration (10%) had no effect on penetration up to 18 minutes root dip but afterward this concentration was found to be significantly inhibitory to juvenile entry. Culture filtrate of G. Virens was found to be more suppressive to nematode penetration in host tissue than that of T. harzianum.
Penetration, Meloidogyne graminicola, Gliocladium virens, Trichoderma harzianum, Rice
