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Table 1 Dose–mortality response (expressed as lethal dosages) of second, third and fourth instar larvae of Pectinophora gossypiella to Heterorhabditis indica under laboratory conditions

From: Biocontrol potential of entomopathogenic nematode, Heterorhabditis indica against pink bollworm, Pectinophora gossypiella (Saunders) (Lepidoptera: Gelechiidae)

Strain

Larval instar

dfa

Lethal dosages 48 h after treatment

Lethal dosages 72 h after treatment

Slope ± SEb

χ2c

LD50d (FL)e

Slope ± SEb

χ2c

LD50d (FL)e

CICR-HI-MN

2nd

6

2.08 ± 0.35

7.19

21.06  (14.72–30.15)

2.21 ± 0.36

10.11

17.04  (10.52–25.07)

 

3rd

6

2.42 ± 0.38

4.13

24.81  (20.11–31.22)

2.67 ± 0.40

6.50

18.53  (13.95–24.01)

 

4th

6

2.55 ± 0.40

2.67

30.22  (24.71–38.54)

2.58 ± 0.39

4.17

23.34  (19.07–28.85)

CICR-HI-CL

2nd

6

2.60 ± 0.51

8.53

8.75  (4.62–12.10)

2.07 ± 0.37

5.78

5.45  (3.52–7.23)

 

3rd

6

1.96 ± 0.32

4.92

6.57  (4.62–8.52)

1.81 ± 0.32

3.64

4.45  (2.69–6.10)

 

4th

6

1.59 ± 0.31

4.04

7.14  (4.68–9.68)

1.92 ± 0.33

5.18

4.60  (2.93–6.18)

  1. adf (degrees of freedom)
  2. bSlope ± SE (standard error)
  3. cχ2 indicates a good fit of the line to the data
  4. dlethal dosages are expressed in IJs per larva
  5. eFL (fiducial limits)