Table 2.
Amount of temephos sand granules (1%) utilized in Ceará for controlling Aedes aegypti larvae.
| Resistance ratio to temephos (RR95) |
||||
|---|---|---|---|---|
| Populations | Number of houses treated with temephos (2002 to 2009) |
Use of temephos from 2002 to 2009 (Kg) |
(2003)** | (2009) |
| Crato | 1059.507 | 60352.7 | 9.0 | 192.7 |
| Barbalha | 447.043 | 29219.0 | 7.5 | 30.0 |
| Juazeiro do Norte | 2093.937 | 0* | 10.4 | 7.2 |
* In this period temephos was substituted by Bacillus thuringienis israelensis (Bti).
** Resistance ratio evaluated by Lima et al., (2006).