Antibiosis Mechanism in Eggplant Against Epilachna Beetle, Henosepilachna vigintioctopunctata (Fab.)

The laboratory studies on antibiosis mechanism of resistance in certain selected brinjal varieties against Epilachna beetle, Henosepilachna vigintioctopunctata (Fab.) revealed that the resistant varieties like Bhanjanagar Local, Pipili 5 and BB 60 C were accounted for increased egg, grub, pupal and adult duration than moderately resistant varieties like BB 26, Banki Local and BB 44. Male:female ratio was found to be more in both resistant and moderately resistant varieties than susceptible check, KB White. The check variety did not favour for egg, grub, pupal and adult development periods but caused for more female forms and accounted for comparatively more population build-up with higher growth index.