Author(s):

A Muthukumar, R Kanagarajan and R Udhayakumar

Abstract: Rice (Oryza sativa L.) is an important target to provide stable food and food security to millions population of the world and is one of the main foodstuffs in Asia. Rice affected by quite a lot of diseases among them Sheath blight, caused by Rhizoctonia solani Kunh., is a soil borne disease of rice occurs in all rice production regions of the world. In the present study aimed to test the efficacy of Carbendazim 50 % WP for the control of rice sheath blight disease. Two field trials were conducted in the rice variety BPT-5204 at Ettimadai village, Namakkal district during the year 2017-2018.The results of the present study revealed that the fungicide formulations were applied as foliar application @ 250, 500 and 650 g / ha could reduce the progress of sheath blight disease by 6.08, 6.19 and 6.35 per cent respectively when compared to untreated control (26.82 PDI). The test molecule Carbendazim 50% WP @ 650 g/ha which was on par with Carbendazim 50% WP @ 500 and 250 g/ha. Among the different treatments, Carbendazim 50%WP @.650g/ha recorded significantly highest grain yield of 9.00 t/ha which was on par with Carbendazim 50%WP @ 500 g/ha (8.85 t/ha) and 250 g/ha (8.76 t/ha). The market sample Carbendazim 50 % WP @ 500 g/ha recorded grain yield of 8.79 t/ha which was on par result with market sample of Carbendazim 50%WP@ 250 g/ha (8.70 t/ha). However, control recorded the lowest grain yield (4.56 t/ha). Similar trend in efficacy was observed with regard to per cent disease index and grain yield on second season Further, Carbendazim 50%WP @500 and 1000 g/ha tested for its phytotoxicity studies did not shows any phytotoxic symptoms like leaf injury, wilting, vein clearing, necrosis, epinasty and hyponasty from 1, 3, 5, 7 and 9 days after spraying with fungicide on rice plants.

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