New bag reduces post harvest losses
January 29th, 2014
<< back

Like metal drum silos used for grain storage, the PICS bag is sealed tightly and pests in the grains cannot survive for long as they are deprived of oxygen.


bag kills pest 1After every harvest, farmers usually have problems storing maize, beans, rice, sorghum, millet and other cereals. The problem is worsened by the fact that most of the pests have developed resistance to the common chemical pesticides in the market. Research has shown that in Africa, farmers lose more than 40 per cent of their crop harvest every year due to pests and lack of proper and efficient storage.


A new storage bag developed by Purdue University, which is being tested by icipe may be a solution to storage problems faced by thousands of farmers. The Purdue Improved Crop Storage (PICS) bag has been used by millions of farmers and consumers to protect the harvested grains in West and Central Africa. The bag has also been effective for storage of grains like maize and beans in East Africa.


The PICS bag is made of three layers of plastic material that deprive pests in stored grain of oxygen.  It consists of two inner bags made of high density polyethylene material and an outer sack composed woven bag. The inner liners have walls of 80 microns thickness, which prevents air from moving across the wall of the bag. The outer woven bag enables easy handling.


The bag works in the same way as metal silos that are used for grain storage- insects cannot survive without oxygen since they use it to digest food to get energy for growth, development and reproduction. When the bag is sealed, the insects in the grains use up all the oxygen in the container while raising the carbon dioxide level. When the oxygen level in the container goes down, the insects cannot feed, their growth, development and reproduction is stopped. They eventually stop growing and die. Insects at larvae and pupae stage are the first to die, leaving the stored grain free of any pests. PICS bags also help preserve the quality of grains. Even after several months of storage, the quality of grain is as good as when it was put in the bag. A PICS bag costs Ksh 200.


Interested farmers can purchase them through Bell Industries Ltd, P.O. Box 18603 -00500, Nairobi Tel 020 6535 828/9 23688 703, 0733 764 562.

more learning through sharing...

flattr this!

8 Responses to “New bag reduces post harvest losses”

  1. Paul says:


    I have read about this bag and it looks like it can be useful to me as I have had to battle with weevils and other pets devouring my maize, peas and green grams every time I harvest.

    Is it possible to get the bags? What is the current cost per bag?

    You can contact me on 0724840644



    • The Organic Farmer says:

      Paul: The last sentence of the article says that the price about KES 200. Talk to Bushell Industries on the numbers given Tel 020 6535 828/9 23688 703, 0733 764 562.

  2. Eric Baliat says:

    Who stocks them in Eldoret town?
    Urgently required.

    • The Organic Farmer says:

      Eric Baliat: In Eldoret town talk to Muguri Agri Supplies on 0725 075 065. You can also check out Farmlink Enterprises.

  3. Tuleto Kunkuru says:

    Am impressed. What is the size/capacity of the bag? What is the expected effective lifespan? Thanks

  4. The Organic Farmer says:

    Tuleto Kankuru: It’s lifespan depends on how well it is taken care of. If keep in a cool dry place away from such rodents as rats then you can use it for even 5 years. Rodents may make holes in the plastic bags. It is mainly dependent on care. There is no storage chemical used in/with the bag!!

    • Tuleto Kunkuru says:

      Thanks, the information is quite helpful. The part of capacity(quantity it can hold)though, seems to have slipped unnoticed.

  5. Murigi says:

    This sounds like a great and healthy alternative to using chemicals to preserve maize. Where can I buy the bags in Molo or Nakuru town? Can sms me on 0786626750

Leave a Reply