Effect of Spraying Potassium Silicate at Different Crop Growth Stages on Brown Spot Incidence and Grain Yield of Rice

Abstract

A field experiment was conducted during Navarai season at Annamalai University Agricultural Experimental Farm using ADT 36 as test cultivar. The efficacy of potassium silicate (3%) was assessed by spraying it once, twice and thrice at different crop growth stages (15, 30 and 45 DAT-Days After Transplanting). The results indicated that the disease incidence was minimum in plots sprayed thrice with potassium silicate at 15, 30 and 45 DAT, followed by plots received two sprays at 15 DAT and 30 DAT which were statistically at par. The grain yield and straw yield were higher in plots sprayed thrice (15, 30 & 45 DAT) followed by plots receiving two sprays.