Abstract :
The life table parameters of Macrosiphum rosae L. (Hemiptera:
Aphididae) on five vermicompost-tea (tea-compost) concentrations (20, 40,
60, 80 and 100%) and control treatment (0%) on Rosa hybrida L. were
determined under laboratory conditions. There were significant differences
among pre-imaginal period and adult longevity of the aphid on the five teacompost
concentrations. The highest mortality occurred at first nymphal
instar on all treatments. The life expectancy (ex) of one-day-old adults was
estimated to be 30, 35, 37, 40, 42 and 20 days on various tea-compost concentrations
and control treatment, respectively. The net reproductive rate (R0)
significantly differed on different treatments, which was the highest on
control (29.12 ± 2.21 female offspring) and lowest on 100% of tea-compost
concentration (15.47 ± 2.12 female offspring). The highest and lowest values
of the intrinsic rate of increase (rm) were 0.736 ± 0.171 day-1 (on control) and
0.105 ± 0.005 day-1 (on 100% treatment), respectively. The finite rate of
increase (?) varied from 1.101±0.143 day-1 (on 100% treatment) to 1.853 ±
0.001 day-1 (on control). Doubling time ranged from 1.806 ± 0.023 (on
control) to 4.587 ± 0.161 days (on 100% treatment). The longest mean
generation time (T) of the rose aphid was obtained on 100% treatment. The
results showed that the 100% of tea-compost concentration had the highest
antibiotic effect on population growth of Macrosiphum rosae.
