부산대학교 도서관

Four introductions ofSolanum berthaultiiwild species and sevenS. tuberosumxS. berthaultiihybrids were evaluated by antibiosis and antixenosis laboratory tests with potato tuber moth. Some morphological and chemical traits related to the trichomes were analysed. Two clones of the wild speciesS. sparsipilumand five ofS. pinnatisectum, characterised by high tuber resistance, were tested for leaf resistance, both by antibiosis and antixenosis assays. The genotypes with high density of trichomes A and with high exudate PPO activity, showed a moderate negative effect on pupal weight and fecundity in the antibiosis tests. Trichomes B exudate showed a strong repulsive effect on oviposition of adult in the antixenosis tests. TheS. pinnatisectumclones revealed a good leaf resistance level, whereas theS. sparsipilumclones showed lower levels of antibiosis and antixenosis.