SCREENING OF PADDY GENOTYPES AGAINST YELLOW STEM BORER, SCIRPOPHAGA INCERTULAS (WALKER)

摘要

Field screening of 231 paddy genotypes including one susceptible check (TN,) was carried out against rice yellow stem borer, Scirpophaga incertulas (Walker) at the Agricultural Research Station (Paddy), Sirsi during kharif 202 under ninfed ecosystem.Genotypes were evaluated based on the standard evaluation scale of 0-9. Per cent white ear produced by yellow stem borer at 80 days after transplanting (DAT) varied between 0.84 (resistant) and 25.96 (susceptible). Out of 231 genotypes, 74 genotypes proved to be resistant to yellow stem borer by recording less than 5 per cent white ears, 87 genotypes reacted as moderately resistant (6-10% white ear), 45 genotypes showed moderately susceptible by recording less tiian 15 per cent white ears and 25 genotypes showed susceptible reaction by recording a white ear per cent in between 16 to 25%. The susceptible check TN, recorded 25.96 per cent white ear. None of the genotypes were free from white ear, to be cttegorized as highly resistant (0% white ear). Similarly, none of the genotype reacted as highly susceptible (26-100% white ear).