Assortment of Indigenous Sorghum Germplasm Based on their Reaction to Stem Borer, on their Reaction to Stem Borer, Chillo partellus Under Artificial Infestation

Thirty seven sorghum germplasm lines were evaluated for resistance to stem borer during kharif 2007 - 2009. Five different parameters viz., deadhearts, stem tunneling, exit holes per stalk, leaf damage score and larvae per stalk were assessed for evaluating resistance. None of these parameters were pronounced in the resistant cultivars. The cluster analysis brought out three discrete categories of entries viz., resistant, moderately resistant and susceptible based on reaction to C. partellus. The entries CJV 25 (IC 308619), GGUB 13 (IC 319859), EC 15 (IC 345717), ES 21 (IC 333366), E 63 (IC 333421), EP 61 (IC 343560), NSJB 6577 (IC 249042), E 56 (IC 333414), GGUB 50 (IC 319892), CJV 11 (IC 308607), NSJB 6585 (IC 249047), NSJB 6662 (IC 249093), GGUB 28 (IC 319871), SEVS 21 (IC 347587), CJV 19 (IC 308614), EG 21 (IC 541328), GGUB 27 (IC 319870), GGUB 61 (IC 319902) and EP 31 (IC 305912) were stable resistant sources, paving way for considering them in future breeding programs.