Volume 5 Issue 1

Efficacy of a new fungicide ‘Trifloxystrobin 25% + Tebuconazole 50%’ 75WG against sheath blight (Rhizoctonia solani Kühn) of rice

Author(s): M. K. BAG
Abstract: Sheath blight of rice caused by Rhizoctonia solani Kühn is one of the most devastating diseases in West Bengal. Due to widespread cultivation of susceptible variety Swarna (MTU 7029), the disease has spread in large scale and sometimes cause severe damage even 100% crop loss also occur. Cultural practices combine with spraying fungicides is the most common practice to manage the disease. An attempt was made to evaluate the efficacy of a new fungicide – a combination of two systemic fungicides viz., Trifloxystrobin 25% (Strobilurin compound) and Tebuconazole 50% (Triazole compound) alongwith two other commercially available fungicides Hexaconazole and Validamycin under challenge inoculation condition. The new fungicide was most effective in decreasing disease severity (37.61% lower over control) and increasing grain yield (50% higher over control). The same fungicide was also proved as best or at par with leading triazole compound to manage the sheath blight disease of rice at several centre under All India Coordinated Rice Improvement Programme during the year 2006 and 2007.

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