Table 2 Spatial and season distribution of melanic and normal forms of An. arabiensis collected form Khartoum State (Sudan) in 1998–1999 and 2004-2006
Study area | Form | Dry season (Oct 1998-June 1999) | Rainy season (Jul-Sep 1998) | Dry season (Oct-2004-Jun-2005) | Rainy season (July-Sep 2005) |
|---|---|---|---|---|---|
El Tries (Irrigated) | Normal | 118 (92.9%) | 241 (97.6%) | 230 (94.3%) | 67 (78.8%) |
Melanic | 9 (7.1%) | 6 (2.4%) | 14 (5.7%) | 18 (21.2%) | |
Total | 127 | 247 | 244 | 85 | |
El Mowailih (Dry-irrigated) | Normal | 49 (41.2) | 312 (75.7%) | 42 (16.1) | 208 (66.5%) |
Melanic | 70 (57.8) | 100 (24.3% | 219 (83.9) | 105 (33.5%) | |
Total | 119 | 412 | 261 | 313 | |
Elrawakeeb (Very dry) | Normal | - | - | - | 2 (6.9%) |
Melanic | - | - | - | 27 (93.1%) | |
Total | - | - | - | 29 |