Bio-chemical basis of resistance in brinjal genotypes to shoot and fruit borer, Leucinodes orbonalis Guen.

Five genotypes of brinjal designated as resistant (Sweta), fairly resistant (Shubham (02)), tolerant (Green Gold (EP-05)), susceptible (Soorakundu local) and highly susceptible (Bejo Sheetal) to Leucinodes orbonalis Guen. were estimated for bio-chemical constituents of leaf samples. Sweta recorded the highest ash content (12.3%) and total phenols (7.6 mg/g) and lowest moisture content (78.4%), total chlorophyll (1.2 mg/g) and total sugars (5.8 mg/g) while Bejo Sheetal, recorded the lowest ash content (10.1%) and total phenols (1.9 mg/g) and highest moisture (89.2%), total chlorophyll (1.9 mg/g) and total sugars (18.0%). There was significant positive relationship between total sugars, total chlorophyll and moisture content with shoot damage and negative relationship between total phenols and ash contents with shoot damage.