EFFECT OF SEED TREATING CHEMICALS AND BAU-BIOFUNGICIDE ON ALTERNARIA BLIGHT (Alternaria hrassicae) OF MUSTARD

Abstract

The effect of three seed treating chemicals viz. Provax, Brine solution, Rovral 50WP and one Biofungicide viz. BAU- Biofungicide were employed against Alternaria blight of mustard caused by Alternaria brassicae and Alternaria brassicicola. Three varieties viz. var. BARI-6, Tori-7 and SAUShorisha-l were used in this study. The field experiment was conducted in the farm of Sher-e-Bangla Agricultural University, Dhaka and laboratory experiment was conducted in the seed health Laboratory, Department of Plant Pathology, Sher-e-Bangla Agricultural University, Dhaka-1207 during the period of November 2008 to July 2009. Among the seed treating chemicals, Rovral 50WP showed the best performance in reducing disease incidence and severity as well as increase seed yield. Again application of Rovral 50WP gave best result in terms of for reduction of number of pod per plant, pod length (em), number of branch per plant, 100 siliqua weight (g) and 1000 seed weight (g). BAU- Biofungicide also showed promising performance in controlling Alternaria blight of mustard and reduced 36% and 53% disease incidence and disease severity respectively over untreated control. BAU-Biofungicide may be recommended for as an alternative means of chemical fungicide such as Rovral 50 WP for controlling Alternaria blight of mustard.