Efficacy of different fungicides against spot blotch of wheat in terai region of West Bengal

Abstract

Field experimentation of ten different treatments with combination of five different fungicides e.i. Captan 50%WP, Propiconazole 25% EC, Tebuconazole 25% EC and Mancozeb 75%WP and another two fungicides mixtureCarboxin 37.5 % + Thiram 37.5% with untreated control (check) were evaluated against spot blotch of wheat fortwo consecutive years (2011-12 and 2012-13) in terai region of West Bengal. The disease incidence (DLA%) anddisease severity (AUDPC) indicate that seed treatment with Carboxin 37.5% + Thiram 37.5%WS @ 2.5 gm kg-1seed with two sprays of Propiconazole 25% EC @ 0.1 % at boot leaf stage and 20 days after first spray reduceddisease incidence (DLA%= 31.89%) and severity (AUDPC= 467.67). The 1000 grain weight and the seed yieldwere also highest in the above treatment (44.69 g and 4.35 t ha-1 respectively) in comparison to other treatmentcombinations.