Responses of two plant-derived bioinsecticides as protectants of smoke-dried catfish, Clarias gariepinus [Pisces: Clariidae] against hide beetle, Dermestes maculatus (De Geer) [Coleoptera: Dermestidae]

Bulletin of the National Research Centre

Table 5 Toxicities of V. amygdalina and T. diversifolia extracts on percentage inhibition, weight loss and adult emergence of D. maculatus

Conc. (g)	Plant extracts	Mean number of surviving larvae ± SE	% adult emergence ± SE	% IR ± SE	% Weight loss ± SE
1	T. diversifolia	1.00 ± 0.04^a	0.00 ± 0.00^a	100.00 ± 0.00^b	0.00 ± 0.00^a
	V. amygdalina	2.00 ± 0.00^a	0.00 ± 0.00^a	100.00 ± 0.00^b	0.00 ± 0.00^a
3	T. diversifolia	0.00 ± 0.00^a	0.00 ± 0.00^a	100.00 ± 0.00^c	0.00 ± 0.00^a
	V. amygdalina	0.00 ± 0.00^a	0.00 ± 0.00^a	100.00 ± 0.00^b	0.00 ± 0.00^a
6	T. diversifolia	0.00 ± 0.00^b	0.00 ± 0.00^a	100.00 ± 0.00^b	0.00 ± 0.00^a
	V. amygdalina	0.00 ± 0.00^a	0.00 ± 0.00^a	100.00 ± 0.00^b	0.00 ± 0.00^a
9	T. diversifolia	0.00 ± 0.00^a	0.00 ± 0.00^a	100.00 ± 0.00^b	0.00 ± 0.00^a
	V. amygdalina	0.00 ± 0.00^a	0.00 ± 0.00^a	100.00 ± 0.00^b	0.00 ± 0.00^a
12	T. diversifolia	0.00 ± 0.00^a	0.00 ± 0.00^a	100.00 ± 0.00^b	0.00 ± 0.00^a
	V. amygdalina	0.00 ± 0.00^a	0.00 ± 0.00^a	100.00 ± 0.00	0.00 ± 0.00^a
0.0	Control	20.00 ± 2.04^b	87.50 ± 3.25^b	0.00 ± 0.00^a	67.50 ± 3.25^b

Mean followed by the same letters within the same column are not significantly different (P >0.05)