In vivo assessment of fungicides and bioagents for Alternaria blight of radish (Alternaria raphani Groves & Skolko)

Abstract

Alternaria blight is most important disease in radish caused by Alternaria raphani and also cause serious damage to the crop yield 46.48% and varied from year to year. In vivo, evaluation of six fungicides (Mancozeb, Carbendazim, Ridomil-MZ and Copper oxy chloride (CoC) with 2.5 gm/kg seed; Propiconazole and Hexaconazole with 2.5 ml); three bioagents i.e. (B. cereus, P. fluorescens and T. harzianum with 5 gm/kg seed) tested against A. raphani. Among fungicides Mancozeb was minimum PDI (5.18, 8.02 and 11.44%) and minimum PDS (9.33, 14.66 and 17.33%) at 35, 45 and 55 DAS also most effective and followed by Carbendazim, Ridomil-MZ respectively. In bioagents T. harzianum showed minimum PDI (12.51, 15.17 and 18.74%) and PDS (22.00, 25.33 and 29.66%) at 35, 45 and 55 DAS; also most effective. Maximum yield (kg/plot) showed by Mancozeb (7.28 kg) and followed by Carbendazim, Ridomil-MZ and minimum yield was found in B. cereus.