Inheritance Pattern of Temephos Resistance, an Organophosphate Insecticide, in Aedes aegypti (L.)

Table 1

Inheritance pattern of temephos resistance in Aedes  aegypti.

S. number	Genetic crosses	Number of females tested	Number of larvae tested	Resistant		Susceptible
				Alive	%	Dead	%
	Parental
1	♂  ×  ♀	25	1824	—	—	1824	100	—
2	♂  ×  ♀	25	1707	1707	100	—	—	—
	generation
3	♂  ×  ♀	25	1744	992	56.88	752	43.11	0.94
4	♂  ×  ♀	25	1697	1014	59.75	683	40.24	1.90
	Backcrosses
5	♂  ×  ♀ (cross  3)	25	1762	968	54.93	794	45.06	0.48
6	♀  ×  ♂ (cross  3)	25	1809	1032	57.04	777	42.95	0.99
7	♂  ×  ♀ (cross  4)	25	1794	1022	56.96	772	43.03	0.97
8	♀  ×  ♂ (cross  4)	25	1846	996	53.95	850	46.04	0.31
	generation
9	♂  ×  ♀ (cross  3)	25	1872	1038	55.44	834	44.55	0.59
10	♂  ×  ♀ (cross  4)	25	1832	1097	59.71	730	40.28	1.88

: resistant; : susceptible. Nonsignificant ( > 0.05).
Late third instar larvae exposed to 0.02 mg/L for 24 h.
The expected percent mortality for cross 1 is 100, cross 2 is zero, and crosses 3–10 is 50%.