Screening of rice germplasm against yellow stem borer (Scripophaga incertulas walker) under shallow water rice ecosystem

Abstract

Eighteen rice germplasm were evaluated against yellow stem borer (Scripophaga incertulas Walker) infestation, to estimate the reaction under field condition during Kharif, 2007 and 2008. Based on pooled mean data, among the tested germplasm; check variety, Savita had shown higher YSB infestation in farm of 17.79 and 11.45 per cent Dead hearts (DH) and White Ears (WEs), respectively. Based on per cent DH infestations at late tillering stage, two germplasm viz., Purrendu (4.97) and IET 20042 (4.59) were found resistant and identified as the promising, ten germplasm including Swarna Sub 1((7.39) was moderately resistant, two viz., IET 20048 (14.61) and IET 19185 (12.16) moderately susceptible and remaining four were found to be susceptible. However, at maturity only on the bases of per cent WEs IET 19171(2.49) was identified as promising one being relatively low infestation, while six germplasm viz., IET 20093 (3.17), IET 20042 (3.27), IET 19186 (3.66), Purrendu (4.16), IET 20039 (4.70) and Swarna Sub 1 (4.82) were moderately resistant, seven moderately susceptible and the remaining four were found to be susceptible. None of the germplasm was highly resistant or highly susceptible against yellow stem borer infestation at both the crop stages.