Table 2.
Effect of S. chamaecyparissus and T. patula essential oils (at a concentration of 0.2%) on the population parameters of M. persicae and R. padi.
| Aphid Species | Treatment | PRP | DF | rm |
|---|---|---|---|---|
| M. persicae | Control | 7.76 ± 0.41 b | 3.27 ± 0.43 bc | 0.31 ± 0.02 c |
| S. chamaecyparissus | 8.47 ± 0.51 a | 1.64 ± 0.56 d | 0.22 ± 0.04 d | |
| T. patula | 8.41 ± 0.43 a | 1.92 ± 0.53 d | 0.24 ± 0.03 d | |
| R. padi | Control | 5.96 ± 0.34 d | 5.95 ± 0.84 a | 0.44 ± 0.03 a |
| S. chamaecyparissus | 6.35 ± 0.38 cd | 2.93 ± 0.87 c | 0.33 ± 0.04 c | |
| T. patula | 6.53 ± 0.46 c | 3.98 ± 0.72 b | 0.37 ± 0.03 b | |
| H(5, 90) | 73.82 | 70.74 | 78.26 | |
| p | <0.0001 | <0.0001 | <0.0001 |
PRP—pre-reproductive period (days); DF—daily fecundity per apterous adult during the period equal to PRP; rm—intrinsic rate of natural increase. Means (±SD) within columns followed by different letters are significantly different at p < 0.05 (Tukey’s test).