Table 6 Probit analysis of Nicotiana tabacum leaf extracts against the adults of Sitophilus oryzae

Hexane

3.21(2.78–3.76)

5.24(4.55–6.31)

2.31(1.85–2.94)

4.12(3.38–5.46)

1.85(1.44–2.43)

3.62(2.92–4.97)

Petroleum ether

1.41(0.38–2.84)

3.45(2.29–8.56)

1.07(− 0.98–3.80)

2.84(1.68–21.00)

0.53(0.43–0.64)

0.85(0.72–1.07)

Dichloromethane

18.76(14.59–27.55)

32.04(24.46–50.22)

15.85(12.24–22.91)

28.55(21.87–43.97)

14.53(11.37–20.18)

27.04(21.08–39.64)

Chloroform

1.62(1.37–1.94)

2.85(2.43–3.54)

0.64(0.53–0.75)

0.99(0.86–1.22)

0.48(0.38–0.60)

0.80(0.68–1.02)

Ethyl acetate

3.26(2.88–3.72)

4.58(4.07–5.39)

2.62(2.27–3.08)

4.10(3.55–4.97)

2.25(1.96–2.66)

3.39(2.92–4.21)

Acetone

1.54(0.91–2.28)

4.02(3.05–6.18)

0.83(0.46–1.27)

1.73(1.28–2.86)

0.48(0.21–0.77)

0.80(0.57–1.49)

Methanol

12.77(9.69–18.43)

27.90(21.24–42.79)

5.68(3.25–9.06)

15.89(11.60–26.74)

3.40(0.20–8.58)

10.38(6.48–34.73)

Aqueous

17.36(14.05–23.20)

29.29(23.39–41.22)

9.63(8.27–11.52)

15.66(13.37–19.22)

9.11(7.76–11.00)

15.64(13.30–19.40)