Investigations on biochemical mechanisms underlying resistance in tomato (Solanum lycopersicum L.) to Helicoverpa armigera

AbstractAmong the biochemical plant character, higher amount of total phenol, O-dihydroxy phenol, flavonols, total soluble sugar and reducing sugar were recorded in cultivars infested with Helicoverpa armigera as compared to uninfested condition. Significantly higher biochemical content was recorded in lower level of nitrogen 25, 50, 75 and 100 kg/acre. Tomato fruit borer had significant positive correlation with reducing sugar and negative correlation with total phenol, O-dihydroxy and flavonols in cultivars Roma, Sioux and Marglobe.