author(s)
Joshi AR, Chaudhari SJ, Patel JR and Chaudhary NJ

abstract
The investigations were carried out at the Agronomy Instructional Farm, C. P. College of Agriculture, S. D. Agricultural University, Sardarkrushinagar during kharif, 2017 on screening of 15 maize varieties/ genotypes for resistance to maize stem borer, chilo partellus infesting maize under field condition on basis of per cent damaged plants, per cent dead heart and leaf injury scale. Based on per cent damaged plants varieties/genotypes of maize GAYMH 1 and HQPM 1 was found to be resistant; GM 2, HQPM 5, P 3502, BYMH 14-18, BYMH 13-3, P 3507, P 740 and Prabal as moderately resistant; BYMH 14-20, BYMH 14-22 and BYMH 13-7 as moderately susceptible; BYMH 14-21 and BYMH 13-5 as susceptible to C. partellus. None of the varieties/genotypes were found highly resistant or highly susceptible to the pest. The leaf injury scale due to C. partellus was ranged from 3.06 to 4.27 among different varieties/genotypes. None of the varieties/genotypes were found highly resistant or highly susceptible. GM 2, GAYMH 1, HQPM 1 and HQPM 5 were found resistant; BYMH 13-5, P 3507, P 3502 and Prabal were found moderately resistant; BYMH 14-21, BYMH 13-3 and BYMH 13-7 were found moderately susceptible; BYMH 14-21, BYMH 14-20 and BYMH 14-22 were found susceptible to C. partellus. Based on per cent dead heart none of the varieties/genotypes were found highly resistant or highly susceptible to the pest. GAYMH 1, HQPM 1 were found resistant; GM 2, HQPM 5, P 3507 and P 740 were found moderately resistant; BYMH 14-20, BYMH 13-7, P-3502, BYMH 14-18, BYMH 13-3 and Prabal were found moderately susceptible; BYMH 14-22, BYMH 13-5 and BYMH 14-21 were found susceptible to C. partellus. Stem tunneling made by the C. partellus were comparatively higher in susceptible varieties than resistant varieties.