Improving efficiency of knowledge and technology diffusion using community seed banks and farmer-to-farmer extension: experiences from Malawi

Table 10 Changes in aflatoxin contamination of groundnut samples from trained farmers in Mzimba, Mchinji and Kasungu districts during the learning phase

District	AFB₁ range	Frequency of Aflatoxin B1 (AFB1) concentration (ppb) in grain samples
District	AFB₁ range	Grain containing less than 20 ppb^a	Grain containing more than 20 ppb^b
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		56.80	43.30
LSD (P < 0.05)		9.96	26.39

^appb = parts per billion. 20 ppb is the Government of Malawi and generally accepted international upper limit for aflatoxin contamination of grain and or food products [39, 40]
^bFarmers from Dowa district did not benefit from research interventions and supplied control grain samples
n = 143

ISSN: 2048-7010