District | AFB1 range | Frequency of Aflatoxin B1 (AFB1) concentration (ppb) in grain samples | |
---|---|---|---|
Grain containing less than 20Â ppba | Grain containing more than 20Â ppbb | ||
Mzimba | 0.4–633.9 | 31.00 | 69.00 |
Mchinji | 0.0–42.9 | 74.00 | 26.00 |
Kasungu | 0.6–138.9 | 72.00 | 28.00 |
††Dowa | 0.0–191.4 | 50.00 | 50.00 |
Means | Â | 56.80 | 43.30 |
LSD (P < 0.05) |  | 9.96 | 26.39 |