Sealed bag stack video
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CTA. 1997. Sealed bag stack video. Spore 71. CTA, Wageningen, The Netherlands.
Permanent link to this item: http://hdl.handle.net/10568/48861
Bag stacks are a familiar feature of grain storage systems in developing countries. The conventional means of preserving grain in such bag stacks involves fumigation under a gas-tight sheet, with the gases methyl bromide or phosphine, and surface...
Bag stacks are a familiar feature of grain storage systems in developing countries. The conventional means of preserving grain in such bag stacks involves fumigation under a gas-tight sheet, with the gases methyl bromide or phosphine, and surface spraying with insecticides. However, if grain is to be stored for longer periods, then a new technique is available that offers considerable improvements in quality preservation. This is achieved by sealing bag stacks into air-tight plastic envelopes. Good quality preservation is ensured by introducing carbon dioxide or phosphine into the envelopes at the time of sealing. As long as the envelopes remain sealed there is no need to add further gas and quality preservation is superior to the conventional system using fumigation under gas-tight sheets. Grain can be stored in sealed stacks for periods of at least two years. As a training aid for pest control personnel their managers, the Natural Resources Institute (NRI) has produced a 20-minute video on sealed stack storage. In addition, a poster has been prepared as an aide-memoire. The focus for these training materials is large-stack storage systems, where stocks of grain run into many hundreds of tonnes. Special attention is given to important management considerations for the planning and maintenance of sealed stack programmes and their cost-effectiveness compared with conventional techniques. Copies of the video and poster are available from NRI free-of charge to countries who are recipients of British aid; otherwise a charge of £20 is made for the video. R.J. Hodges, Food Storage Group NRI University of Greenwich, Chatham Maritime, Kent ME4 4TB, UK