A field experiment composed of 36 and 44 elite maize genotypes including OPV,QPM,
Hybrid an'd check were evaluated at NMRP, Rampur respectively during two consecutive
years, 2067/68 and 2068/69 to detect the resistance source of maize to maize stem borer
infestation. The study revealed that vegetative stage of crop was more wlnerable than older
stages. Visually (0-9 scale), none of the tested varieties showed immune to maize stem
borer infestation. Mean percent of insect damage during 2067/68 varied from 3.5 to 35.7%
whereas 1.5 to 32.2% damage was recorded in 2068/69. Maize genotypes POP 44XPOOL
15, HB-B, Rampur S03F02, Rampur S03F8, Upahar, SOOTL YQ-AB and
COTAXLA0024 during 2068/69 and POP 44XPOOL15, Rampur S03F02, Upahar,
COTAXLA0024, Narayani, S03TLYQ-AB-2 and SOOTLYQ-AB during 2067/68 were
found least damaged. Tunnel length and exit holes were also observed minimum and
relatively similar trend to above depicted parameters. Thus, it is apparent from two years
observations that POP44X POOL 15, Rampur S03F02, Upahar and COTAXLA 0024 from
OPV and SOOTL YQ-AB from QPM were recorded significantly less infestation and
considered as a promising against maize stem borer infes~tion.

A field experiment composed of 36 and 44 elite maize genotypes including OPV,QPM,
Hybrid an'd check were evaluated at NMRP, Rampur respectively during two consecutive
years, 2067/68 and 2068/69 to detect the resistance source of maize to maize stem borer
infestation. The study revealed that vegetative stage of crop was more wlnerable than older
stages. Visually (0-9 scale), none of the tested varieties showed immune to maize stem
borer infestation. Mean percent of insect damage during 2067/68 varied from 3.5 to 35.7%
whereas 1.5 to 32.2% damage was recorded in 2068/69. Maize genotypes POP 44XPOOL
15, HB-B, Rampur S03F02, Rampur S03F8, Upahar, SOOTL YQ-AB and
COTAXLA0024 during 2068/69 and POP 44XPOOL15, Rampur S03F02, Upahar,
COTAXLA0024, Narayani, S03TLYQ-AB-2 and SOOTLYQ-AB during 2067/68 were
found least damaged. Tunnel length and exit holes were also observed minimum and
relatively similar trend to above depicted parameters. Thus, it is apparent from two years
observations that POP44X POOL 15, Rampur S03F02, Upahar and COTAXLA 0024 from
OPV and SOOTL YQ-AB from QPM were recorded significantly less infestation and
considered as a promising against maize stem borer infes~tion.