Mechanism of Resistance in Sesame genotypes to Antigastra catalaunalis Dup

Abstract

Twenty one species of sesame genotypes were evaluated to determine the mechanism of resistance to Antigastra catalaunalis, only four genotypes viz, ES 22, UMA, SI 250 and KMR 14 were less preferred for oviposition. The lowest number of eggs was laid on UMA (12.33 ± 2.33). The egg laying of A. catalaunalis was positively correlated (r = 0.749) with the trichome density in the leaf. The growth index of A. catalaunalis was low in the resistant genotypes ES 22, SI 250 and UMA and high in susceptible genotypes TMV 3, TMV 4, TMV 5, TMV 6 and TC 25 indicated antibiosis mechanism. The total phenols in the leaves, flowers and pods were negatively correlated with damage of A. catalaunalis.