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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)