Vol.6 : Number 9
Effect of different time and method of application of antagonists and propiconazole on sheath blight of rice cause by Rhizoctonia solani Kuhn

Author(s): Durga Prasad, Arun Kumar


Sheath blight is particularly important in intensive rice production systems. Present study was undertaken to evolve an efficient and reliable management practice for sheath blight of rice. In an investigation, on the basis of two years experimental results; it was found that two applications of Carbendazim at seed and symptoms initiation stage, was superior (although at par) to four applications of combination of antagonist (Trichoderma harzianum + Pseudomonas fluorescens) at seed, seedling, tillering and symptoms initiation stage of rice crop, in reducing incidence and severity of sheath blight and increasing the grain yield per ha. However, with respect to increasing the grains weight and ears weight, four applications of antagonists at above mentioned four crop stages was superior to two applications of Carbendazim, although at par. In another investigation, it was observed that four applications of Propiconazole at seed, seedling, tillering and symptoms initiation stages, resulted in maximum reduction in sheath blight incidence and severity, with highest weight of thousand grains and ten ears weight, which was at par with reduction in incidence and severity recorded due to thrice applications of Propiconazole at seedling, tillering and symptoms initiation stages. Twice applications of Carbendazim at seed and symptoms initiation stages resulted in significantly lower level of reduction in disease incidence and severity as compared to four & three applications of Propiconazole.

Key Words: Propiconazole, Pseudomonas fluorescens, Rhizoctonia solani, Sheath blight, Seedling root dip, Trichoderma harzianum


Country: India