Screening for Resistance against Northern Corn Leaf Blight (Exserohilum turcicum (Pass.) K.J. Leonard & Suggs) in Temperate Maize Lines

Abstract

Ten early duration maize lines, namely, CM 128, V 327, V 335, V 13, V 128, V 17, V 336, CM 129, V 53
and V 27, were screened against northern corn leaf blight (Exserohilum turcicum (Pass.) K.J. Leonard & Suggs)
under fi eld as well as under artifi cial epiphytotic conditions. Five inbreds, viz., V 335, V 13, V 336, V 53 and
V 27 were identifi ed as resistant while rest fi ve viz., CM 128, V 128, V 327, V 17 and CM 129 were found
susceptible. In the pooled disease scores across the three seasons, the highest mean score of 4.0 was recorded
for V 128, indicating high level of susceptibility, whereas, lowest mean score of 1.5 recorded for V 335, showed
high level of resistance across the locations. The promising inbreds can be utilized as a resistant donor in
breeding programme. These inbreds possess resistance to northern corn leaf blight, can be used successfully in
developing high yielding early maturing varieties for the hill region.