Efficacy of fungicides against Stemphylium blight disease of lentil under field condition

Experiments were carried out to search for resistant source(s) and chemicals controlling stemphylium blight disease of lentil at Plant Pathology Division, Bangladesh Agriculture Research Institute, Joydebpur, Gazipur during the period of September 2013 to April 2014. The experimental design was RCBD in field condition having three replications. Eleven lentil test entries along with 2 check variety BARI masur1 and BARI masur7 were evaluated. Altogether 6 fungicides i.e. Rovral 80WP (Iprodione, 0.2%), Secure 600 WG (Fenamidone+ Mancozeb, 0.1%), Nativo (Tebuconazole+Trifloxystobin, 0.2%), CM 75WP (Carbendazim+ Mancozeb 0.2%), Dimox 35 (Dimathomorph+Cymoxonil, 0.05%) and Vita Flo 200 FF (Carboxin +Thiram, 0.05%) were evaluated along with a control. The minimum disease score (1.0) was recorded in Rovral 80 WP treated plot and the highest disease score (4.0) was counted in control plot. Among the six fungicides Rovral 80 WP from the iprodione group gave the best performance in respect of plant height (35.50 cm), number of branch per plant (8.33), number of pod per plant (36.67), number of seed per pod (1.98), thousand seed weight (18.50 g) and grain yield (1280 kg/ha).