Skip to main content

Table 1 Duration of different developmental stages and predatory potential of Eupeodes frequens

From: Larval feeding capacity and pollination efficiency of the aphidophagous syrphids, Eupeodes frequens (Matsmura) and Episyrphus balteatus (De Geer) (Diptera: Syrphidae) on the cabbage aphid (Brevicoryne brassicae L.) (Homoptera: Aphididae) on mustard crop

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  
  1. *Values in parentheses are the range values
  2. **Mean ± SE of 10 individuals
  3. t test for adult longevity (male-female)