STUDIES ON THE CONTROL OF COLLAR ROT DISEASE CAUSED BY <em>RHIZOCTONIA</em> <em>SOLANI</em> IN TEAK (<em>TECTONA</em> <em>GRANDIS</em>) BY SEED TREATMENT

Abstract

A survey which was carried out in the teak nurseries of Coimbatore Forest Division revealed that seedlings of teak (Tectona grandis) are susceptible to collar rot disease caused by Rhizoctonia solani, anamorph of Thantephorous cucumeris. Seed treatment with fungicides Emisan-6, Indofil M-45 or Bavistin reduced the collar rot of teak seedlings. Biological control agent Trichoderma viride MNT-7 reduced the collar rot disease even at a low concentration of 5 ml spore suspension kg^-1 of seed. The results suggest that these control measures can be used for successful raising of teak seedling in nurseries.