Author(s):

T Sivakumar, A Muthukumar, K Sanjeevkumar, P Balabaskar and S Sudhasha

Abstract: Sheath blight of rice incited by Rhizoctonia solani is one of the major important disease. In the present investigation study of bioefficacy and phytotoxicity of Azoxystrobin 120 + Tebuconazole 240 SC against Sheath blight (R solani) diseases in Rice. The field experiment was conducted at Killimangalam village, Cuddalore dt., Tamil nadu.The treatments with new combination fungicide, Azoxystrobin 120 + Tebuconazole 240 SC @ 830 ml/ha recorded the minimum sheath blight incidence with 11.34, 11.04 and 10.95 per cent after first, second and third spray respectively. This was followed by the dosage level with Azoxystrobin 120 + Tebuconazole 240 SC @ 676 ml/h which recorded 11.23, 11.13and 11.09 per cent after first, second and third spray respectively. While the untreated control recorded the maximum PDI (29.80, 37.75, 50.71) was recorded. Similarly Azoxystrobin 120 + Tebuconazole 240 SC @ 830 ml/ha recorded the maximum grain yield with 48.35 q/ha and maximum straw yield with 39.98 q/ha which was followed by the treatment Azoxystrobin 120 + Tebuconazole 240 SC @ 676 ml/ha with grain yield with 46.56 q/ha and maximum straw yield with 38.24 q/ha. Further the treatments with new combination fungicide no phototoxic consequence and was also found safe to the crop as it did not influence the natural enemy population.

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