Vol. 10, Issue 12 (2021)

Author(s):
G Gokulapriya, M Chandrasekaran, A Nithya Devi and K Indhumathi

Abstract:
The study was conducted to identify the biochemical basis of resistance in the brinjal accessions against shoot and fruit borer, Leucinodes orbonalis (Guenee). The experiment was laid out at Horticultural College and Research Institute (Women), Tamil Nadu Agricultural University, Trichy, Tamil Nadu, with thirty nine accessions and three varieties. The results of the screening revealed that, out of thirty nine entries only six brinjal accessions viz., IC 136451, IC 136231, IC 136061, IC 136296, IC 546016, IC 089964 were identified under moderately resistant category with 11- 20% mean fruit damage. Another twelve accessions namely IC 136249, IC 136309, IC 383099, IC 136250, IC 112341, IC 215021, IC 136302, IC 136546, IC 127023, IC 90982, IC 136299, IC 90925 were found to be tolerant with 21 - 30% damage intensity and remaining 12 accessions were identified in susceptible category with 31 - 40% fruit damage. Nine brinjal accessions with mean per cent damage intensity greater than 41 were graded as highly susceptible category. The biochemical analysis performed for each category indicated that the protein content ranged between 26 mg/g to 84 mg/g, total sugars varied from 5.58 mg/g to 18.25 mg/g and the phenol content found between 1.26 to 5.79 mg/g. It is obvious from the correlation studies which revealed that the total sugar (r = 0.76), and soluble protein (r = 0.48) were positively correlated whereas total phenol (r = - 0.96) was negatively correlated with the infestation of shoot and fruit borer.