Table 1.

Insecticidal activity of compounds 1–13and juvenile hormone analogue fenoxycarb against the larvae of S. littoralis (Boisd.), after 72 h of treatments.

2nd instar larvae				4th instar larvae
Comp.	LC50(ppm)	slope	Toxic ratio	LC50 (ppm)	slope	Toxic ratio
fenoxycarb	5.943	0.298 ± 0.0808	0.684	59.914	0.225 ± 0.0870	0.954
1	26.546	0.246 ± 0.0805	0.153	145.369	0.301 ± 0.0991	0.393
2	12.505	0.246 ± 0.0793	0.325	67.908	0.297 ± 0.0893	0.840
3	57.622	0.246 ± 0.0791	0.070	254.471	0.225 ± 0.0820	0.224
4	25.414	0.233 ± 0.0756	0.159	128.376	0.297 ± 0.0978	0.445
5	15.720	0.196 ± 0.0858	0.258	81.406	0.231 ± 0.0880	0.702
6	20.478	0.239 ± 0.0796	0.198	91.360	0.341 ± 0.0987	0.625
7	21.424	0.209 ± 0.0756	0.191	113.203	0.293 ± 0.0966	0.505
8	8.032	0.262 ± 0.0793	0.506	67.670	0.266 ± 0.0912	0.844
9	37.445	0.213 ± 0.0794	0.108	148.565	0.302 ± 0.0986	0.384
10	37.495	0.221 ± 0.0794	0.108	152.260	0.239 ± 0.0985	0.375
11	13.885	0.261 ± 0.0802	0.292	68.670	0.260 ± 0.0912	0.832
12	14.106	0.218 ± 0.0776	0.288	77.624	0.202 ± 0.0793	0.742
13	4.066	0.196 ± 0.0756	1	57.170	0.264 ± 0.0905	1