MAN MOHAN SUNDRIA AND AKHIL KUMAR1

Twenty selected germplasm of groundnut were evaluated in the laboratory for their susceptibility to C. serratus infestation. Maximum eggs (96.13) were laid on ICGV- 93133 in free choice chamber tests, while the least preferred germplasm was BAU-13 with only (0.89 eggs). ICGV-92040, ICGV-93133, ICGV-93134 and ICGV-93388 were preferred for egg laying with 92.04, 67.23, 64.79 and 62.07 eggs, respectively in no choice test. Maximum incubation period was recorded on ICGV-92222 and ICGV-93420 showing 8.56 days on each. The developmental period varied from 39.82 to 59.72 days with maximum time being on ICGV-93420 and minimum on ICGV-92040. Similarly, maximum weight loss (18.17 per cent) was recorded for ICGV-92040 and minimum for ICGV-93420 (0.07 per cent), indicating that ICGV-93420 was relatively resistant to the damage of the bruchid.