Pesticidal Activity of Sundarban Mangrove Plant Extracts against Sitophilus Pests and Identification of Active Constituents Using LC-MS

Table 2

Insecticidal activity of the methanolic crude extract of Sundarban plants against S. oryzae and S. zeamais insects at 2.5 mg/disc concentration.

Name of plant extract	Plant part^¥	No. of insect	No of dead adult S. oryzae insects			No of dead adult S. zeamais insects
			Days after treatment			Days after treatment
			5^th	5^th	15^th	5^th	5^th	15^th
A. corniculatum (L.) blanco	B	10	6.0 ± 0.6	8.3 ± 0.3	9.6 ± 0.3	5.0 ± 0.5	6.0 ± 0.6	8.3 ± 0.8
E. agallocha (L.)	B	10	7.7 ± 0.3	9.0 ± 0.6	10 ± 0.0	4.3 ± 0.3	8.0 ± 0.5	9.3 ± 0.6
H. fomes (buch.)	B	10	4.6 ± 0.3	8.3 ± 1.6	10 ± 0.0	5.0 ± 0.6	6.3 ± 0.8	10 ± 0.0
	L	10	1.3 ± 0.3	2.3 ± 0.3	3.6 ± 0.8^∗	0.0 ± 0.0	1.3 ± 0.33	3.6 ± 0.3
X. granatum (K. D. Koenig)	B	10	1.0 ± 0.0	1.3 ± 0.3	2.0 ± 0.5	0.0 ± 0.0	0.33 ± 0.3	1.3 ± 0.33
X. moluccensis (lam.) M. Roem.	B	10	2.3 ± 0.3	3.0 ± 0.5	5.0 ± 0.6	0.33 ± 0.3	1.0 ± 0.0	1.6 ± 0.3
	L	10	0.3 ± 0.3	1.0 ± 0.6	1.6 ± 0.3	1 ± 0.6	2.6 ± 0.33	7.3 ± 1.4
	F	10	0.6 ± 0.3	1 ± 0.0	2.3 ± 0.3	0.0 ± 0.0	0.0 ± 0.0	1.3 ± 0.3
	P	10	0.0 ± 0.0	1 ± 0.6	2.3 ± 1.4	0.0 ± 0.0	1.3 ± 0.3	2.0 ± 0.5
Permethrin (2.0 mg/disc)	-	10	7.6 ± 0.3	8.3 ± 0.4	10 ± 0.0	8.0 ± 0.6	9.0 ± 0.5	10 ± 0.0
Control disc (vehicle)	-	10	0.0 ± 0.0	1.3 ± 0.3	1.3 ± 0.3	0.0 ± 0.0	1.3 ± 0.3	2.0 ± 0.6

¥ B= Bark, L = leaf, F = fruit, P = pneumatophore; results are expressed as mean ± SEM. vs. control.