The Journal of Basic and Applied Zoology

Table 4 Adulticidal activity of Nicotiana tabacum leaf extracts against Sitophilus oryzae at 48 h

From: Toxicity of tobacco Nicotiana tabacum Linnaeus (Solanaceae) leaf extracts to the rice weevil Sitophilus oryzae Linnaeus 1763 (Coleoptera: Curculionidae)

Solvent extracts	Concentration (mg/L)
Solvent extracts	UC	TC	0.625	1.25	2.50	5.00	10.00	20.00
Hexane	0.00 ± 0.00^a1	0.00 ± 0.00^a1	2.00 ± 2.64^a	2.33 ± 0.57^a12	6.33 ± 1.52^b23	9.33 ± 1.15^c23	10.0 ± 0.00^c3	10.0 ± 0.00^c2
Petroleum ether	0.00 ± 0.00^a1	0.00 ± 0.00^a1	6.33 ± 3.51^b2	8.66 ± 1.52^b3	8.66 ± 2.30^b23	9.33 ± 1.15^b23	10.0 ± 0.00^b3	10.0 ± 0.00^b2
Dichloromethane	0.00 ± 0.00^a1	0.00 ± 0.00^a1	0.00 ± 0.00^a12	1.00 ± 1.73^a1	1.33 ± 1.15^ab1	1.66 ± 0.57^abc1	5.00 ± 2.64^bc12	5.33 ± 2.51^c1
Chloroform	0.00 ± 0.00^a1	0.00 ± 0.00^a1	5.33 ± 2.51^b12	9.66 ± 0.57^c3	10.00 ± 0.00^c3	10.00 ± 0.00^c3	10.00 ± 0.00^c3	10.00 ± 0.00^c2
Ethyl acetate	0.00 ± 0.00^a1	0.00 ± 0.00^a1	0.66 ± 0.57^a1	1.00 ± 0.00^a1	5.00 ± 3.60^b12	9.66 ± 0.57^c3	10.00 ± 0.00^c3	10.00 ± 0.00^c2
Acetone	0.00 ± 0.00^a1	0.00 ± 0.00^a1	6.33 ± 0.57^b2	9.00 ± 1.00^c3	9.00 ± 1.00^c23	10.00 ± 0.00^c3	10.00 ± 0.00^c3	10.00 ± 0.00^c2
Methanol	0.00 ± 0.00^a1	0.00 ± 0.00^a1	3.00 ± 2.00^ab12	4.33 ± 1.15^bc2	5.00 ± 1.73^bcd12	6.33 ± 3.05^bcd2	8.33 ± 1.15^cd23	8.66 ± 0.57^d2
Aqueous	0.00 ± 0.00^a1	0.00 ± 0.00^a1	0.33 ± 0.57^a1	0.66 ± 0.57^a1	1.00 ± 0.00^a1	4.00 ± 0.57^a1	4.66 ± 3.05^ab1	5.00 ± 0.00^b1

Values are mean numbers expressed in mg/L. UC untreated control, TC treated control; values are mean of three replicates of three trials ± standard deviation; different superscript alphabets in rows indicate values significant than respective UC and TC, and different superscript numerical in columns indicate values significant between the extracts difference at p < 0.05 level by one-way ANOVA followed by Tukey test performed; similarity in superscript alphabets and numerical in rows and columns indicate no significant variation

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