Stage | Eupeodes frequens | Episyrphus balteatus | |||
---|---|---|---|---|---|
Mean duration (days ± SE) | Mean aphid consumption ± SE | Mean duration (days ± SE) | Mean aphid consumption ± SE | ||
Egg | 3.5 ± 0.22** (3–5)* | – | 3.8 ± 0.16 (3–5)* | – | |
Larva | 1st instar | 4.2 ± 0.20 (3–5) | 34.4 ± 2.38 (27–46)* | 4.8 ± 0.25 (4–6) | 39.6 ± 1.91 (29–47)* |
2nd instar | 3.4 ± 0.16 (3–4) | 67.2 ± 3.08 (52–85) | 3.3 ± 0.21 (3–4) | 114.8 ± 1.66 (103–124) | |
3rd instar | 4.8 ± 0.20 (4–6) | 184.4 ± 6.51 (164–221) | 5.6 ± 0.27 (4–7) | 237.0 ± 3.04 (220–251) | |
Total | 12.4 ± 0.27 (11–14) | 261.7 ± 4.37 (251–292) | 13.7 ± 0.45 (12–16) | 393.6 ± 3.44 (375–407) | |
F values | – | 152.99 | – | 163.42 | |
P values | – | < 0.001 | – | < 0.0001 | |
Pupal period | 11.9 ± 0.48 (9–13) | 8.8 ± 0.36 (8–11) | – | ||
Adult longevity | Male | 15.2 ± 0.74 (13–17) | 10.6 ± 0.51 (9–12) | – | |
Female | 17.6 ± 0.68 (16–19) | 12.6 ± 0.51 (11–14) | – | ||
t values | 0.0003 | 0.0009 |