Table 1.

The average insecticidal activity for 15 tested compounds against the third larval instar of C. pipiens after 12 h. compared to the insecticidal activity of a conventional insecticide “Chlorpyrifos” at the same conditions. Confidence Interval (C.I) of 95%.

Compound No	LC25/ mg/mL ± SD	LC50/ mg/mL ± SD	LC90/ mg/mL ± SD	χ2cal./tab. (7.8)	r2	P value	Toxicity index
1a	169.2 ± 0.6	334.3 ± 0.1	1219.4 ± 0.22	2.4	0.87	0	23.3
1b	220.9 ± 0.4	361.8 ± 0.2	923.1 ± 0.26	1.1	0.94	0.009	21.5
3	217.7 ± 0.9	378.8 ± 0.12	1084.7 ± 0.14	0.9	0.99	0.008	20.5
5a	190.1 ± 0.75	342.7 ± 0.3	1050.1 ± 0.15	2.8	0.99	0.004	22.7
5b	108.3 ± 0.8	182.1 ± 0.42	488.4 ± 0.24	1.6	0.93	0.001	42.8
6	42.3 ± 0.2	78.0 ± 0.32	252.0 ± 0.36	1.5	0.99	0.006	100
7	77.2 ± 0.1	183.5 ± 0.4	950.2 ± 0.6	5.4	0.99	0.009	42.5
8	101.9 ± 0.95	191.6 ± 0.65	635.8 ± 0.29	1.4	0.92	0.001	40.7
9	88.9 ± 0.7	175.0 ± 0.25	633.7 ± 0.24	4.6	0.95	0.001	44.5
10	88.4 ± 0.5	139.9 ± 0.23	221.2 ± 0.61	4.1	0.95	0.002	55.7
11b	179.4 ± 0.6	308.8 ± 0.26	866.8 ± 0.68	3.6	0.87	0	25.2
12	112.1 ± 0.8	186.9 ± 0.34	649.9 ± 0.69	2.2	0.95	0	41.7
13	200.5 ± 0.65	386.1 ± 0.24	1341.4 ± 0.45	0.7	0.99	0.008	20.2
14	246.4 ± 0.1	357.8 ± 0.47	727.1 ± 0.25	1.8	0.97	0.002	21.7
16	80.2 ± 0.12	127.5 ± 0.36	307.2 ± 0.69	4.5	0.98	0.002	61.1
Chlorpyrifos	247.3 ± 0.31	588.3 ± 0.28	3052.4 ± 0.95	1.1	0.99	0.007	13.2

(LC (mg/L)) Lethal Concentration/ milligram per Litre.

(χ²cal./tab_.) Chi-square value calculated/tabulated.

(r²) Correlation coefficient.