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Egyptian Journal of Biological Pest Control

Table 1 Larval bioassay with Spilosoma obliqua Nucleopolyhedrosis virus (SpobNPV) against 2nd, 3rd and 4th larval instars of Spilosoma obliqua

From: Characterization and field evaluation of Spilosoma obliqua nucleopolyhedrosis virus (SpobNPV) CRIJAF1 strain against jute hairy caterpillar, Spilosoma obliqua (Walker) infesting jute, Corchorus olitorius Linn.

Larval instar

Number of larvae

LC50 (POB’s/ml)

Fiducial limits

Slope

SE ± 

χ2

DF

Lower limit

Upper limit

2nd Instar

480

2.42 × 104

1.24 × 104

4.99 × 104

0.87

0.29

3.23

6

3rd Instar

480

3.09 × 106

9.75 × 105

1.03 × 107

0.56

0.04

4.11

6

4th Instar

480

5.05 × 107

4.11 × 106

9.23 × 107

0.31

0.11

2.76

6

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