Evaluation of promising sorghum lines with wide gene pool for locating new sources of resistance against rice weevil, Sitophilus oryzae

Seed damage mean calculated for each genetic material ranged from 12.29% (279 B) to 38.42% (P 151). Four sorghum lines viz., 27 A, 279 A, UPMC 503, and P 311 recorded less than 15% seed damage. The means of seed weight loss for each genetic material showed that PC 9 recorded minimum seed weight loss (2.72%) followed by 27 A, 279 B, CSB 21F, UPMC 503 and MP Chari and were statistically not significant. Sorghum line P151 recorded the highest per cent seed weight loss (16.74%) while five lines viz., 279 A, PC 23, SPV 125, P 311 and SPV 1015 recorded less than 5% seed weight loss. Entries like 279 A, PC 23, SPV 125, P 311 and SPV 1015 can be new sources of resistance against S. oryzae.