Adult and pre-adult survival rate
No significant genotypic effect on adult survival rates of
F. occidentalis was found (Table 1). However, significant
differences between resistant, intermediate, and susceptible
accessions were found for survival rates from the L1 to
L2 larval stage and from the L2 to pre-pupal stage. The
survival from the L1 to L2 stage varied from 0 to 100%.
High percentages (80–100%) were found for the three susceptible
accessions. In contrast, all resistant accessions
completely suppressed the development of L1 to L2 larvae.
On the leaves of moderately resistant accessions, development
of L1 to L2 was observed, but survival rates were low
(15–55%). Significant differences were also found within
the groups of susceptible and intermediate accessions.