author(s)
Pratap Divekar, Pradyumn Kumar and Suby SB

abstract
Ten different maize germplasm were evaluated for their relative resistance to maize stem borer Chilo partellus (Swinhoe). Several biological parameters of C. partellus viz., larval and pupal survival, larval and pupal recovery, larval and pupal weights and percent pupation and plant parameter i.e. leaf injury rating (1-9) were used to study the germplasm susceptibility level. Larval weight (10^th, 18^th and 25^th Days after Artificial Infestation) and pupal weights were significantly lower on the germplasm viz., BML-7 and HKI-323 as compared to the germplasm namely, HKI-1128 and HKI-193-1 indicating the germplasm susceptibility level. The pupae obtained from the relatively resistant germplasm were found deformed with lower weight indicates maximum antibiosis resulted from rearing the larvae on resistant germplasm. The adverse effects on biological parameters were found more pronounced in larval and pupal weight, and larval survival and percent pupation of C. partellus. Relatively higher percent pupation and larval survival were observed on highly susceptible germplasm HKI-1128 and HKI-193-1 as compared to resistant ones BML-7 and HKI-323.