Author(s):

H Basavarajeshwari and Mruthunjaya C Wali

Abstract: The study was carried out at college of agriculture, Dharwad during kharif 2018, with the objective of identifying resistant sources of maize for turcicum leaf blight caused by Exserohilum turcicum. In this context 16 NBPGR lines were selected based on the per se peformance and 48 experimental single cross hybrids were developed using three testers in line x tester mating design. These hybrids were evaluated for disease reaction along with parents and checks (DKC-9144, GH-0727 and NK-6240). Artificial inoculation was done in whorl using grounded TLB mass multiplied sorghum seeds and scoring was done using 1-9 scale during silk drying stage. Among 70 genotypes, the tester CI-4 showed resistant reaction. The line NBPGR-9 and the hybrids GPBMH-1819, GPBMH-1820, GPBMH-1821, GPBMH-1824 and GPBMH-1839 showed moderately resistant reaction. This information can be useful for selection of parents or development of resistant hybrids or utilize them as resistant sources in breeding programme.

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