CO-FRIENDLY MANAGEMENT OF LEAF BLIGHT ( Bipolaris sorokiniana ) OF WHEAT

Abstract

The experiment was carried out to determine the effect of different ceo-friendly treatments against management of leaf blight (Bipo/aris sorokinianay of wheat during the period from December-2007 to March-2008 at the farm of Sher-eBangla Agricultural University. Twelve treatments were explored in this experiment namely farmer's saved seed (T1), apparently healthy seed (T2), fanner's saved seed treated with brine solution (T3), apparently healthy seed treated with brine solution (T4), sun drying of fanner's saved seed (Ts), sun drying of apparently healthy seed (T6), hot water treatment of farmer's saved seed (T7), hot water treatment of apparently healthy seed (Ts), polythene solarization of farmer's saved seed (T9), polythene solarization of apparently healthy seed (TIO), fanner's saved seed treated with Bavistin SOWP (T II) and apparently healthy seed treated with Bavistin SOWP (TI2)' The experiment was laid out in the Randomized Complete Block Design (RCBD) with three replications. The highest reduction of incidence of seed-borne Bipolaris sorokiniana was recorded in treatment T12. Among the eco- friendly treatments the highest reduction of incidence of Bipolaris sorokiniana as well as leaf infection and yield was found in treatment T8 which was closely related to Til' Among the rest of the seed treatments, T6 gave good result in reducing leaf infection, increasing seed germination as well as seed yield. Treatment T4 and TIO also increased seed germination, seed yield and reduced the leaf infection in field condition. Farmer's saved seeds treated with hot water, polythene solarization, brine solution and apparently healthy seeds showed moderate performances regarding over control (TI).