| Samples collection sites | Percentage of onion plants infected by Fusarium spp |
| Yako (Yk) | 90.00a |
| Titao (T) | 86.67a |
| Gassan (Ga) | 83.33a |
| Di (Di) | 80.00a |
| Kongoussi (Kg) | 80.00a |
| Korsimoro (Kr) | 76.67a |
| Mogtedo (Mg) | 76.67a |
| Dano (Da) | 73.33a |
| Reo (R.) | 66.67a |
| Loumbila (Lm) | 63.33ab |
| Ouayigouya (Oua) | 63.33ab |
| Donsin (Do) | 60.00ab |
| Koudougou | 56.67ab |
| Kokologho | 53.33ab |
| Tougan | 30.00bc |
| Soumasso | 13.30c |
| Bama | 10.00c |
| Average | 62.55 |
| CV (%) | 29.70 |
| P value | <0.0001 |