Table 2 Potency of the ultraviolet protectant, octyl palmitate for increasing the toxicity of three bioinsecticides against the 4th instar larvae of S. littoralis under field-laboratory conditions.

Dipel DF

10 g

84 ± 1.73^a

72 ± 2.31^a

42 ± 2.31^a

15 ± 2.31^a

3 ± 0.58^a

0.00 ± 0.00^a

–

47.57

Dipel DF + Octyl palmitate

10 g + 1 g

90 ± 1.73^b

81 ± 1.73^b

63 ± 1.73^b

42 ± 3.46^b

21 ± 1.73^b

0.00 ± 0.00^a

1.38

65.41

Tracer

2.5 g

81 ± 16^a

66 ± 1.73^c

30 ± 1.16^c

9 ± 0.00^a

0 ± 0.00^c

0.00 ± 0.00^a

–

40.97

Tracer + Octyl palmitate

2.5 ml + 1 g

81 ± 2.31^a

81 ± 1.61^b

66 ± 2.89^b

36 ± 1.73^bc

24 ± 0.58^d

0.00 ± 0.00^a

1.55

63.43

Diacox

3 g

100 ± 0.00^c

96 ± 2.31^d

69 ± 2.89^b

30 ± 1.16^c

9 ± 0.58^e

0.00 ± 0.00^a

–

66.96

Diacox + Octyl palmitate

3 g + 1 g

100 ± 0.00^c

96 ± 1.73^d

90 ± 2.31^d

81 ± 2.89^d

60 ± 1.16^f

27 ± 0.58^b

1.49

100