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Post-Harvest control of Aflatoxin, Ernest Moturi Ogwora, NCPB
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Post-Harvest control of Aflatoxin, Ernest Moturi Ogwora, NCPB

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Presentation from the Aflacontrol Conference on Aflatoxins, Food Safety and Food Security, Nairobi, Kenya January 2011

Presentation from the Aflacontrol Conference on Aflatoxins, Food Safety and Food Security, Nairobi, Kenya January 2011

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Post-Harvest control of Aflatoxin, Ernest Moturi Ogwora, NCPB Post-Harvest control of Aflatoxin, Ernest Moturi Ogwora, NCPB Presentation Transcript

  • Aflatoxin Control
    Post –Harvest
    Ernest Moturi Ogwora- NCPB
    13/01/2011
    1
    Alatoxin Control
  • Preparing for Storage
    Harvest early at physiological maturity (grain moisture content will be around 26%)
    Stook maize for two or more weeks to dry on the field (grain moisture will reduce to 18%).
    De husk and remove from field for shelling, conditioning, further drying to 13.5% m.c. and storage
    Ensure crop is not left on the ground and bare soil.
    Fungal spores are found on the soil
    13/01/2011
    2
    Alatoxin Control
  • Good Storage
    The grain must be properly dried (<13.5% M.C).
    Use tarpaulins or clean paved surface for drying the grain.
    Clean and sieve to remove broken, foreign matter, diseased and rotten grains.
    Dust for pests (apply the pesticide on cool grains).
    Weigh and bag in natural fibre bags for storage.
    Grain that is broken or with foreign matter attracts moisture and pests leading to spoilage and or fungal growth
    13/01/2011
    3
    Alatoxin Control
  • Storage
    The storage is very important at the farm, trader, transporter, processor or consumer level.
    Common practice farmers store grain in residential houses
    Grains stored in pp or plastic bags common
    Commingle new and old stocks or treated and untreated stocks.
    13/01/2011
    4
    Alatoxin Control
  • Good Storage
    Grading
    Orderly stacks - that depict uniformity
    Clear pathways
    Record keeping
    Regular sampling
    Timely pest control interventions
    Clear priority stock disposal
    13/01/2011
    Alatoxin Control
    5
  • MYTHS ABOUT AFLATOXIN
    Aflatoxin is just politics, we have eaten our maize and nothing has happened to us.
    Drying contaminated maize will control aflatoxin
    Drying of contaminated grain well will not reverse the effect of the poison.
    It may inhibit further growth of the mould-the poison produced remains
    13/01/2011
    6
    Alatoxin Control
  • Controlling Aflatoxin
    Cooking controls aflatoxin
    Cooking thoroughly will not eradicate aflatoxin
    Aflatoxin is not pathogen. It is a poison
    Blending will control aflatoxin
    Mixing - blending of contaminated grain with good grain is not advisable.
    It only dilutes
    13/01/2011
    7
    Alatoxin Control
  • Source of Aflatoxin Maize
    Aflatoxin comes only with grain from outside – UG or TZ and now from Eastern.
    The source is not important the handling and storage is
    The mould is naturally occurring and needs food, water, oxygen and heat to grow.
    13/01/2011
    8
    Alatoxin Control
  • Feeding Animals
    It is okay to feed suspect food to domestic animals – rather than waste it.
    It will harm the animals
    The toxin will find its way into humans through animal products e.g. meat and milk.
    13/01/2011
    9
    Alatoxin Control
  • Disposal of Contaminated Maize
    Any maize with aflatoxin must be disposed immediately through burning.
    13/01/2011
    10
    Alatoxin Control
  • Best Aflatoxin Control
    Dry the maize immediately upon harvesting
    Maintain a high standard of hygiene when handling maize as you would other foods.
    Control can be as simple as that.
    13/01/2011
    Alatoxin Control
    11
  • Thank You
    Contributions?
    13/01/2011
    Alatoxin Control
    12