Field evaluation of improved rice genotypes against yellow stem borer

Forty four rice cultivars were evaluated against yellow stem borer under field condition under two level of nitrogen i.e. at zero and 180 kg ha⁻¹. It was revealed that at high nitrogen level ADT 43 recorded 35% DH, 30%WEH, Saket 4 50%DH, 16% WEH, Annada 44% DH, 17% WEH where as at zero nitrogen level ADT 43 recorded 15%DH, 20% WEH, Saket 4 11%, DH, 3% WEH and Annada 14%DH, 7%WEH, respectively and were found susceptible to yellow stem borer. At high nitrogen level Surendra recorded 7%DH, 3%WEH, MTU 1071 6%DH, 2%WEH and PR 111 6%DH, 4%WEH whereas, at their zero level of nitrogen Surendra recorded 2%DH, 4% WEH, MTU 1071 6%DH, 4%WEH and PR 111 4%DH, 3% WEH, respectively. Under high N level invariably there was high incidence of DH and WEH in most of the genotypes than the zero N level.