FUNGICIDAL MANAGEMENT OF SHEATH BLIGHT OF RICE

Abstract

A field experiment was carried at Hajee Mohammad Danesh Science & Technology University, Dinajpur during the period of July 2009 to December 2009 to find out the fungicidal management of sheath blight of rice. Three fungicides viz. Bavistin 50 WP, Tilt 250 EC and Folicour EW 250 were sprayed against R. solani causing sheath blight on three aman rice varieties viz. Hybrid Hera, BRRI Dhan-49 and BR-11.Control plot was sprayed with only water. The experiments were laid out in two factors Randomized Complete Block Design (RCBD) with three replications. The tallest plant height (116.80 cm) was recorded in Hybrid Hera variety and the shortest plants height (106.00 cm) was obtained from the BR-11 variety. The percent relative lesion height (% RLH) was found significantly in deferent with some extent. Comparatively, the lower % RLH (3.42) was recorded in Folicour EW 250 sprayed plot where the highest % RLH (4.16) was found in control plot. The percent decrease of relative lesion height (17.78%) was recorded in the Folicour EW 250 sprayed plot over control. Highest numbers of infected tiller/hill (5.28) were recorded in the control plot where the lowest numbers of infected tiller/hill (4.92) was recorded in Folicour EW 250 sprayed plot but incase of varieties the highest numbers of infected tiller/hill (8.31) was recorded in BR-11 variety and the lowest numbers of infected tiller/hill (3.31) was recorded in Hybrid Hera. The highest yield (t/ha) (5.81) was recorded in Folicour EW 250 sprayed plot and the lowest yield (t/ha) (4.24) was recorded in the control plot. Due to the spraying fungicides Folicour EW 250 it reduces the lower disease severity and increased yield (37.02%) than over control. In case of varieties, the highest yields (5.93 t/ha) was recorded in Variety BR-11 and the lowest yield (5.10 t/ha) was obtained from Hybrid Hera variety. From the present findings it may be concluded that Folicour EW 250 was a promising fungicide for lowering sheath blight incidence and BR-11 was the best variety among the three aman varieties in respect of yield.