BIOLOGICAL CONTROL OF ROOT ROT DISEASE OF MUSTARD

Abstract

Infection of Macrophomina phaseolina on 30 day old mustard (Brassica juncea) seedling was inhibited by Bradyrhizobium japonicum, Trichoderma harzianum, Gliocladium virens and Paecilomyces lilacinus when used as seed dressing or as soil drench, while on 60 day old plants B. japonicurn combined with T. harzianum and P. lilacinus were effective. Infection of Rhizoctonia solani on 30 day old seedling was completely inhibited by B. japonicum, T. harzianum, T. viride, G. virens, R lilacinus and Stachybotrysatra and on 60 day old plant by B. japonicum, T. viride, G. virens, P. lilacinus and S. atra when used as seed dressing and or as soil drench. Fusarium infection was completely controlled by B. japonicum and To viride and by combined use of B. japonicum with T. harzianum, T. viride. G. virens, P. lilacinus and S. atra in 30 day old seedlings and bys. atra in 60 day old plants when used as seed dressing and or as soil drench.