Screening of rice landraces and their morpho-biochemical basis of resistance against Cnaphalocrocis medinalis

Host plant resistance is very important in contrast of spraying insecticide to manage leaf folder, Cnaphalocrocis medinalis. From wide germplasm rice, fifty rice landraces were screened and traits for are characterized against folder under natural climatic conditions. The occurrence % damage showed significant variation revealed the presence resistance-susceptibility status among tested land races rice. infestation recorded significantly less highly resistant landraces, viz. Rajboga, Kari kagga Mapilai samba -1 (0.55-0.90%) comparison susceptible genotypes, GK -5, Krishna leela, Kaggalikearona, Bangaragandu, Kundipullan, Puttabatta-2 Navara (66.03 74.77%). correlation analysis that height, length flag panicle had negative influence on offered resistance. amount total sugar reducing sugars, free amino acids, nitrogen phosphorus higher entries whereas, phenols, potassium tannins found genotypes.