2024, Vol. 7, Issue 1, Part D

author(s)
V Prasad, SKS Rajpoot, Saurabh Dixit, DK Dwivediand and MK Maurya

abstract
Sheath blight of rice caused by Rhizoctonia solani Kuhn is most widely distributed and cause substantial yield loss. It is major production constraint in high yielding varieties under intensive rice production system. The pathogen has very wide host range and exhibits considerable pathogenic and molecular variability. Due to non-availability of resistant cultivars, the management of sheath blight primarily dependence on chemicals control only. The present study focused on better management practices with minimum use fungicides for the management of this disease. In view of above Integrated Disease Management practices were adapted from nursery to main field with six treatment combinations ie. T₁- Seed treatment with Bio-control agent (Trichoderma viride) @ 10 g/kg seed, T₂ - T₁ + bio-control agent at 15-20 DAT, T₃ - T₁ + one spray of propiconazole at booting stage, T₄ - T₂ + one spray of propiconazole at booting stage, T₅ - Seed Treatment with carbendazim (2 g/kg) + spray of (trifloxystrobin 25% + tebuconazole 50%) @ 0.4 g/l at booting stage and T₆ - control. The experiment was laid out in RBD with four replications in 5X2 m plot size with 15X15 cm spacing. Among the treatment combination T-4 (Seed treatment with bio agent+ bio agent at 20 DAT+ Propiconazole @1 g/l) was found most effective in checking the sheath blight severity (21.4%), incidence (22.3%) and increase the grain yield (3800 kg/ha) in comparison to non IPM adopted plot disease severity (64.4%), incidence (42.5%) and grain yield (2475 kg/ha).