Effect of Various Vermicompost-Tea Concentrations on Life Table Parameters of Macrosiphum rosae L. (Hemiptera: Aphididae) on Rose (Rosa hybrida L.) Flower

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. weredetermined under laboratory conditions. there were significant differencesamong pre-imaginal period and adult longevity of the aphid on the five teacompostconcentrations. the highest mortality occurred at first nymphalinstar on all treatments. the life expectancy (ex) of one-day-old adults wasestimated to be 30, 35, 37, 40, 42 and 20 days on various tea-compost concentrationsand control treatment, respectively. the net reproductive rate (r0)significantly differed on different treatments, which was the highest oncontrol (29.12 ± 2.21 female offspring) and lowest on 100% of tea-compostconcentration (15.47 ± 2.12 female offspring). the highest and lowest valuesof the intrinsic rate of increase (rm) were 0.736 ± 0.171 day-1 (on control) and0.105 ± 0.005 day-1 (on 100% treatment), respectively. the finite rate ofincrease (?) 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 (oncontrol) to 4.587 ± 0.161 days (on 100% treatment). the longest meangeneration time (t) of the rose aphid was obtained on 100% treatment. theresults showed that the 100% of tea-compost concentration had the highestantibiotic effect on population growth of macrosiphum rosae.