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Not AvailableForty seven sweet sorghum genotypes were evaluated for resistance to stem borer during kharif 2007 - 2009. Principal component analysis (PCA) was performed considering five parameters viz., dead-hearts, stem, peduncle tunneling, exit holes/stalk, number of larvae/ stalk. Two principal components (PCs) were extracted explaining a cumulative variation of 71.5 %. PC1 explained 47.7 % of the variation while PC2 explained 23.7 % of variation. PC1 had the loadings for dead-hearts (0.85), stem tunneling (0.73), exit holes/ stalk (0.87) whereas peduncle tunneling (0.82) and larvae/ stalk (0.81) were loaded in PC2 . PCA brought out three characters/variables viz. dead-hearts, stem tunneling and exit holes/ stalk, as most important in explaining variability thus, aiding in deciding reaction to pest. Eleven genotypes viz., E 27, IS 18162, IS 18164, E 38, ICSV 700, ICSV 93046, NSSV 6, GGUB 50, IS 5353, KARS 95 and RSSV 9 were found resistant to stem borer, Chilo partellusNot Availabl