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.
Large differences in survival were also observed for the
transition from the L2 larval stage to the pre-pupal
stage. Survival on the three susceptible accessions was high
(78–88%), but there was no significant variation within
this group. No pre-pupae developed on two of the moderately
resistant accessions (Capsicum frutescens L. Lombok
and C. annuum Laris), whereas 54% of the L2 larvae survived
on the third moderately resistant C. annuum BruinsmaWonder.
The development from pre-pupae to pupae and adults
could only be studied in the three susceptible accessions
and in the moderately resistant accession BruinsmaWonder,
as in the other accessions no pre-pupae were formed.
No significant genotypic differences were found for
survival in these stages. The survival rate frompre-pupa to
pupa varied from 77 to 83% and almost all (92–100%)
pupae developed into adults.