Growth promotion of transplanted rice plant by fungal and bacterial bioagents effective against brown leaf spot caused by Drechslera oryzae

摘要

The experiment was conducted to evaluate growth promotion of transplanted rice by fungal and bacterial bioagents effective against brown leaf spot of rice. Bioagent formulations (Trichoderma viride, T. harzianum, Pseudomonas fluorescens and Bacillus subtilis) were applied as seed treatment and foliar spray and compared with untreated check. All bioagent formulations were significantly effective in increasing number of tillers per hill, root length, fresh and dry root weight, fresh and dry shoot weight and grain yield over check. Present study revealed that potential fungal and bacterial bioagents effective against brown leaf spot disease of rice, exhibited plant growth promoting activities and resulted in 21.69 to 23.97 per cent reduction in the disease severity and 34.43 to 40.99 per cent increase in grain yield over untreated check.