Biochemical basis of plant resistance in brinjal genotypes against shoot and fruit borer (Leucinodes orbonalis, Guenee)

The biochemical factors responsible for resistance in brinjal genotypes against shoot and fruit borer was investigated during kharif 2017-18 at college of Horticulture, Venkataramannagudem using sixty genotypes and three check cultivars. Among all the genotypes evaluated, IC 136061 registered lowest shoot infestation (9.01%) and fruit infestation (12.73%) due to the presence of high quantities of phenol, peroxidase, PAL in shoot (4.60 mg g-1, 6.62 units -1min-1g-1, 7.96 μmol -1 min -1 mg-1) and in fruit (5.31 mg g-1, 7.56 units -1min-1g-1, 8.26 μmol -1 min -1 mg-1) compared to Dommeru Local (Susceptible check-1) which received highest shoot infestation (34.99%), fruit infestation (46.77%) due to low phenol, peroxidase, PAL content in shoot (0.54 mg g-1, 1.62 units -1min-1g-1, 1.21 μmol -1 min -1 mg-1) and in fruit (0.61 mg g-1, 1.77 units -1min-1g-1, 1.43 μmol -1 min -1 mg-1). The brinjal genotypes IC 136061 with high phenol, peroxidase and PAL content in shoot-fruit could be used in breeding programmes for developing resistant cultivars against shoot and fruit borer.