OVIPOSITION AND FEEDING BY LUCERNE WEEVIL, HYPERA POSTICA GYLL. IN LUCERNE GENOTYPES

Abstract

Prelerential oviposition and antibiosis are the two factors considered vital components ofhost plant resistance [1]. Beck [2] suggested that recognition and orientation ofthe host plant followed by selection of specific site, the deposition of eggs and insect feeding in a crop are governed by the inherent physical and chemical factors. Dosger and Hanson [3] reported significant differences among lucerne varieties against the weevil, Hypera postica, and these were attributed to differential tolerance behaviour of the varieties.