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

Egyptian Journal of Biological Pest Control

Table 2 Field evaluation of Spilosoma obliqua Nucleopolyhedrosis virus (SpobNPV) against third instar larvae of Spilosoma obliqua (pooled mean data for the years 2020 and 2021)

Treatments	No. of larvae before treatments	No. of larvae/plant
		Days after spray
		2	4	7
SpobNPV (3.54 × 10⁸ POB’s/ml) @ 2 ml/l	46.67^A ± 5.24	23.00^C ± 3.46	18.67^B ± 0.88	9.67^B ± 1.20
Bacillus thuringiensis kurstaki NCIM2514 @ 2 ml/l	45.33^A ± 4.10	33.67^B ± 3.71	20.67^B ± 0.88	13.33^B ± 2.60
Chlorpyriphos 20EC @ 2 ml/l	47.67^A ± 2.40	19.33^C ± 0.88	11.33^C ± 0.88	3.33^C ± 0.33
Control	45.00^A ± 3.51	47.33^A ± 3.53	50.00^A ± 3.21	59.33^A ± 1.20

Means followed by different letters within a row indicate significant differences (P < 0.05; LSD)