RESISTANCE MECHANISMS OF SOYBEAN GENOTYPE S - NON-PREFERENCE TEST OF ANTICARSIA-GEMMATALIS HUBNER, 1818 (LEP, NOCTUIDAE)

Dual choice tests were performed in Londrina, PR, during 1988 and 1989 to evaluate feeding preference of Anticarsia gemmatalis Hubner (Lepid optera: Noctuidae) for soybean (Glycine max (L.) Merrill) genotypes. C omparisons among six different lines, one cultivar and, three insect r esect introductions were made using standard cultivars, 'Davis', 'Boss ier' and 'Santa Rosa' on three simultaneous tests. The lines BR82-1254 7, IAC74-2832 and the plant introductions 227687, 229358 and 274454 we re rejected by the caterpillars, while lines BR79-15149 and GoBR83-370 04 were preferred. The other genotypes (BR80-25896,'IAC-100' and GoBR8 3-60040) did not differ from standards, in relation to caterpillar pre ference, based upon consumption index. Lines descending from introduce d plants (PI) 229358 and PI 274454 showed better non-preference perfor mance than those descending from PI 227687.